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  • Prof. R. K. Dwivedi
Professor
rk.dwivedi@jiit.ac.in

Education

M. Tech. Ph.D. IIT, BHU 

Biography

Dr. R.K. Dwivedi did his M.Sc. in Physics from Kanpur University followed by M. Tech. and Ph.D. in Materials Science and Technology from IIT BHU, Varanasi. After completing Ph.D., Dr. Dwivedi has worked as a post doctoral fellow in the Department of Metallurgical Engineering and Materials Science, IIT Bombay.  Dr. Dwivedi has been working in the field of synthesis and characterization of advance materials for last 18 years. His research finding includes the development of materials for Barrier Layer Capacitor (BLC) applications and publication of a series in three parts on Valence Compensated Perovskite Oxides. Dr. Dwivedi is recipient of a best paper presentation award. He has received life membership of MRS India. He has collaboration with IIT BHU, SSPL, NPL and IISc Bangalore.  He has supervised 9 M. Tech. Dissertations and 5 Ph.D. theses.  He is a reviewer of several journals of international repute. Dr. Dwivedi has completed 3 research projects sponsored by DST, DRDO, AICTE and one National project on MEMS and Smart Systems sponsored by NPMASS as a Principal Investigator/Co-Investigator/Coordinator.

Sponsored R & D Projects

AICTE

PI: Prof. K.C. Mathur,  Co-PI: Dr. R.K. Dwivedi

Title: Modernization of Materials Science Lab

Amount: Rs.7.0 lacs

Duration:  03 years (2008-2011)

DRDO

PI: Dr. R.K. Dwivedi

Title: Investigations multifunctional properties of substituted Multiferroics

Amount: Rs.16.128 lacs

Duration:  02 years (2010-2012)

DST

PI: Dr. R.K. Dwivedi

Title: Investigations on alkaline and rare earth doped BiFe1-xTmxO3 Solid solutions

Amount:  Rs.51.31lacs

Duration:  03 years (2011-2014)

Publications

International Journals

  • Singh Vikash, Sharma Subhash and Dwivedi R.K., [2018]. Improved dielectric, magnetic and optical properties of Pr and Ti co-substituted BFO ceramics, J. alloy and Compounds, Vol. 747,  pp. 611-620.
  • Pal Vijayeta, Kumar A., Thakur O.P., Dwivedi R.K., [2018]. Structural investigation of Ca/Zr co-substituted BaTiO3 through XRD and Raman spectroscopy, J. Alloys and Compounds Vol. 732, pp. 666-673.
  • Sharma Subhash and Dwivedi R.K. {2017]. Substitutionally driven phase transition and enhanced multiferroic and electrical properties of (1-x) BiFeO3 – (x) Pb(Zr0.52Ti0.48)O3 ceramics (0.0 ≤ x ≤ 1.00), J. Alloys and Compounds, Vol. 692, pp. 770 – 773.
  • Jha Pardeep K., Jha Priyanka A., Singh Prabhakar, Ranjan Rajeev and Dwivedi R. K., [2017]. Sm/Ti co-substituted bismuth ferrite multiferroics: reciprocity between tetragonality and piezoelectricit, Physical Chemistry Chemical Physics, Vol. 19, pp. 2685-2695.
  • Pal Vijayeta, Kumar A., Thakur O.P., Dwivedi R.K., Prasad N.E., [2017]. Preparation, microstructure and relaxor ferroelectric characteristics of BLNT–BCT lead-free piezoceramics,  J. Alloys and Compounds, Volume 714, pp. 725–735.
  • Jha, P. K., Jha, P. A., Kumar, P., Asokan, K., & Dwivedi R.K.(2016). Gradient core-shell microstructure in mixed valence multiferroic: TM (Ti, Nb, W) substituted bismuth ferrite. Journal of Alloys and Compounds, 667, 178-183.
  • Sharma, S., Singh, V., & Dwivedi R.K.(2016). Electrical properties of (1− x) BFO - (x) PZT multiferroics synthesized by sol-gel method: Transition from relaxor to non-relaxor. Journal of Alloys and Compounds, 682, 723-729.
  • Gautam, C., Madheshiya, A., Sharma, P., & Dwivedi, R.K. (2016). Synthesis and Electrical Properties of (Pb, Bi) TiO 3 Ceramics. International Journal of Applied Ceramic Technology, 2(13), 340-351.
  • Dwivedi R.K., Jha, P. K., Jha, P. A., & Kumar, P. (2015). Structural–Electrical property correlation in defect induced nanostructured off-stoichiometric bismuth ferrite: A defect analysis. Materials Chemistry and Physics, 164, 15-22.
  • Jha, P. K., Jha, P. A., Singh, V., Kumar, P., Asokan, K., & Dwivedi R.K.(2015). Diffuse phase ferroelectric vs. Polomska transition in (1-x) BiFeO3-(x) Ba Zr0.025Ti0.975O3 (0.1≤ x≤ 0.3) solid solutions. Journal of Applied Physics, 117(2), 024102.
  • Pal, V., Thakur, O. P., & Dwivedi R.K.(2015). Investigation of MPB region in lead free BLNT-BCT system through XRD and Raman spectroscopy. Journal of Physics D: Applied Physics, 48(5), 055301.
  • Sharma, S., Singh, V., Kotnala, R. K., Ranjan, R., & Dwivedi R.K.(2014). Co-existence of tetragonal and monoclinic phases and multiferroic properties for x⩽0.30 in the (1− x) Pb(Zr0. 52Ti0.48)O3 - (x) BiFeO3 system. Journal of Alloys and Compounds, 614, 165-172.
  • Sharma, S., Singh, V., Dwivedi R.K., Ranjan, R., Anshul, A., Amritphale, S. S., & Chandra, N. (2014). Phase transformation, improved ferroelectric and magnetic properties of (1− x) BiFeO3 - xPb(Zr0. 52Ti0.48)O3 solid solutions. Journal of Applied Physics, 115(22), 224106.
  • Sharma, S., Singh, V., Kotnala, R. K., & Dwivedi R.K.(2014). Effect of Zr/Ti ratio on structural, vibrational, magnetic and dielectric properties of (0.95) PbZrxTi1− xO3 - (0.05) BiFeO3 ceramics. Journal of Materials Science: Materials in Electronics, 25(6), 2697-2702.
  • Jha, P. A., Jha, P. K., Jha, A. K., Kotnala, R. K., & Dwivedi R.K.(2014). Phase transformation and two-mode phonon behavior of (1− x)[Ba Zr0.025Ti0.975O3] - (x)[BiFeO3] solid solutions. Journal of Alloys and Compounds, 600, 186-192.
  • Sharma, S., Singh, V., Kotnala, R. K., & Dwivedi R.K.(2014). Comparative studies of pure BiFeO3 prepared by sol–gel versus conventional solid-state-reaction method. Journal of Materials Science: Materials in Electronics, 25(4), 1915-1921.
  • Pal, V., Dwivedi R.K., & Thakur, O. P. (2014). Effect of neodymium substitution on structural and ferroelectric properties of BNT ceramics. Materials Research Bulletin, 51, 189-196.
  • Jha, P. K., Jha, P. A., Kumar, P., Asokan, K., & Dwivedi R.K.(2014). Defect induced weak ferroelectricity and magnetism in cubic off-stoichiometric nano bismuth iron garnet: effect of milling duration. Journal of Materials Science: Materials in Electronics, 25(2), 664-672.
  • Jha, P. K., Jha, P. A., Srivastava, G., Jha, A. K., Kotnala, R. K., & Dwivedi R.K.(2014). Analytical comparison of magnetic and electrical properties using modified Landau theory in bismuth ferrite: Effect of milling. Journal of Magnetism and Magnetic Materials, 349, 95-99.
  • Singh, V., Sharma, S., Kumar, M., Kotnala, R. K., & Dwivedi R.K.(2014). Structural transition, magnetic and optical properties of Pr and Ti co-doped BiFeO3 ceramics. Journal of Magnetism and Magnetic Materials, 349, 264-267.
  • Singh, V., Sharma, S., Jha, P. K., Kumar, M., & Dwivedi R.K.(2014). Effect of Y3+ substitution on structural, electrical and optical properties of BiFeO3 ceramics. Ceramics International, 40(1), 1971-1977.
  • Pal, V., Dwivedi R.K., & Thakur, O. P. (2014). Synthesis and ferroelectric behavior of Gd doped BNT ceramics. Current Applied Physics, 14(1), 99-107.
  • Pal, V., Dwivedi R.K., & Thakur, O. P. (2013). Dielectric and Ferroelectric Properties of Lead-Free Ceramic System. Advances in Materials Science and Engineering, 2013.
  • Singh, V., Sharma, S., Dwivedi R.K., Kumar, M., & Kotnala, R. K. (2013). Multiferroic and optical properties of Pr‐substituted bismuth ferrite ceramics. physica status solidi (a), 210(7), 1442-1447.
  • Kumar, A., Dwivedi R.K., Baboo, S., & Parkash, O. (2013). Low Temperature Dielectric Relaxation in System. Journal of Materials, 2013.
  • Pal, V., Dwivedi R.K., & Thakur, O. P. (2012). Effect of processing on synthesis and dielectric behavior of bismuth sodium titanate ceramics. Journal of Ceramics, 2013.
  • Sharma, S., Singh, V., Parkash, O., & Dwivedi R.K.(2013). Effect of processing on dielectric properties of (0.95) PbZr0.52Ti0.48O3 – (0.05) BiFeO3. Applied Physics A, 112(4), 975-984.
  • Jha, P. A., Jha, P. K., Jha, A. K., & Dwivedi R.K.(2013). Dielectric behavior of (1− x) Ba Zr 0.025Ti0.975O3 – (x) BiFeO3 solid solutions. Materials Research Bulletin, 48(1), 101-105.
  • Singh, V., Sharma, S., Dwivedi R.K., Kumar, M., Kotnala, R. K., Mehra, N. C., & Tandon, R. P. (2013). Structural, dielectric, ferroelectric and magnetic properties of Bi0.80A0.20FeO3 (A= Pr, Y) multiferroics. Journal of superconductivity and novel magnetism, 26(3), 657-661.
  • Pal, V., & Dwivedi R.K.(2012). Effect of rare earth Gadolinium substitution on the structural, microstructure and dielectric properties of lead free BNT ceramics. In Advanced Materials Research (Vol. 585, pp. 200-204). Trans Tech Publications.
  • Kumar, A., Dwivedi R.K., & Pal, V. (2012). Dielectric Behavior and Impedance Spectroscopy of Ba1-xBixTi1-xFexO3 System. In Advanced Materials Research (Vol. 585, pp. 190-194). Trans Tech Publications.
  • Kumar, P., Prasad, R., Srivastava, A. K., Vijayan, N., Dwivedi R.K., & Singh, H. K. (2012). Microstructural and magnetotransport properties of La 1− xCa xMnO3 (0.45≤ x≤ 0.60) thin films. Journal of Alloys and Compounds, 531, 23-29.
  • Pawan, K., Dwivedi Rakesh K., Pawan  K., Ravikant, P., Praveen, K. S., & Hari, K. S. (2011). Magneto-transport Properties of La0. 80Sr0. 20Mn1-xCuxO3 Thin Films Fabricated by Using Spray Pyrolysis. Journal of Korean Physical Society, 58, 58.
  • Kumar, P., Prasad, R., Srivastava, A. K., Singh, H. K., Dwivedi R.K., & Singh, M. P. (2011). Anomalous Weak Ferromagnetism in Electron-doped Nd1− xSrxMnO3 (0.50≤ x≤ 0.62) Thin Films. Journal of the Korean Physical Society, 59(4), 2792-2796.
  • Kumar, P., Prasad, R., Srivastava, A. K., Singh, H. K., Dwivedi R.K., & Singh, M. P. (2011). Anomalous Weak Ferromagnetism in Electron-doped Nd1− xSrxMnO3 (0.50≤ x≤ 0.62) Thin Films. Journal of the Korean Physical Society, 59(4), 2792-2796.
  • Dwivedi R.K., Kumar, P., & Mishra, S. K. (2007). Nanosynthesis of Lead‐Doped Neodymium Manganite Powder and Characterization. Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 37(6), 443-446.
  • Dwivedi R.K., Parkash, O., Kumar, D., Srivastava, K. K., & Singh, P. (2007). Ferroelectric transitions in valence compensated Ba1− xLaxTi1− xCrxO3 ceramics. Journal of materials science, 42(1), 72-79.
  • Parkash, O., Kumar, D., Dwivedi R.K., Srivastava, K. K., Singh, P., & Singh, S. (2007). Effect of simultaneous substitution of La and Mn on dielectric behavior of barium titanate ceramic. Journal of materials science, 42(14), 5490-5496.
  • Dwivedi R.K., Raj, M. R., & Bahadur, D. (2005). Low temperature synthesis and magneto-electrical studies in Nd1− xPbxMnO3 system. Journal of materials science, 40(18), 4801-4805.
  • Srivastava, C. M., Dwivedi R.K., Asthana, S., Nigam, A. K., & Bahadur, D. (2004). Effect of Cr substitution on transport and magnetic ordering in. Journal of magnetism and magnetic materials, 284, 239-252.
  • Dwivedi R.K., Kumar, D., & Parkash, O. (2003). Grain and grain boundary relaxation in Sr1-xLaxTi1-xCrxO3 ceramics: impedance and modulus spectroscopy. British ceramic transactions, 102(1), 1-9.
  • Parkash, O., Kumar, D., Srivastav, K. K., & Dwivedi R.K.(2001). Electrical conduction behaviour of cobalt substituted BaSnO3. Journal of materials science, 36(24), 5805-5810.
  • Gautam, C. R., Dwivedi R.K., Kumar, D., & Parkash, O. (2001). Synthesis and electrical conduction behaviour of strontium yttrium titanium cobalt oxide (Sr 1− x Y x Ti 1− x Co x O 3, 0.01≤ x≤ 0.10). Materials Letters, 50(4), 254-258.
  • Dwivedi R.K., Kumar, D., & Parkash, O. (2001). Valence compensated perovskite oxide system Ca1-xLaxTi1-xCrxO3 Part I Structure and dielectric behaviour. Journal of materials science, 36(15), 3641-3648.
  • Dwivedi R.K., Kumar, D., & Parkash, O. (2001). Valence compensated perovskite oxide system Ca1-xLaxTi1-xCrxO3 Part II Electrical transport behavior. Journal of materials science, 36(15), 3649-3655.
  • Dwivedi R.K., Kumar, D., & Parkash, O. (2001). Valence compensated perovskite oxide system Ca1-xLaxTi1-xCrxO3 Part III Impedance spectroscopy. Journal of materials science, 36(15), 3657-3665.
  • Dwivedi R.K., Kumar, D., & Parkash, O. (2001). Structure and dielectric behaviour of valence compensated perovskite oxide Sr1-xLaxTi1-xCrxO3 ceramics. British ceramic transactions, 100(3), 115-119.
  • Gautam, C. R., Dwivedi R.K., Kumar, D., & Parkash, O. (2001). Synthesis and electrical conduction behaviour of strontium yttrium titanium cobalt oxide (Sr1-xYxTi1-xCoxO3, 0.01≤ x≤ 0.10). Materials Letters, 50(4), 254-258.
  • Dwivedi R.K., Kumar, D., & Parkash, O. (2000). Dielectric relaxation in valence compensated solid solution Sr0.65La0.35Ti0.65Co0.35O3. Journal of Physics D: Applied Physics, 33(1), 88.
  • Dwivedi R.K., Parkash, O., Kumar, D., Pandey, L., & Srivastav, K. K. (2000). Effect of processing route on the dielectric behavior of (Sr0.50Ca0.15La0.35)(Ti0.65Co0.35)O3 ceramic. Ceramics international, 26(1), 13-17.
  • Dwivedi R.K., Parkash, O., Christopher, C. C., Kumar, D., & Pandey, L. (1996). Effect of processing route and parameters on the dielectric properties of the valence compensated composition Sr0.65La0.35Ti0.65Co0.35O3. Journal of materials science letters, 15(21), 1865-1867.

National Journal

  • Gautam, C. R., Madheshiya, A., & Dwivedi R.K.(2015). Synthesis, crystallization, and dielectric behaviour of lead bismuth titanate borosilicate glasses with addition of 1% La2O3. Indian Journal of Materials Science, 2015
  • Pal, V., Thakur, O. P., & Dwivedi R.K.(2015). Effect of co-substitution of La/Li on structure, microstructure, dielectric and piezoelectric behavior of Bi0. 50Na0. 50TiO3 ceramics. Indian Journal of Physics, 89(2), 123-130.
  • Katare, R., Pandey, L., Dwivedi, R.K, Parkash, O., & Kumar, D. (1999). A novel approach based on impedance spectroscopy for measurement of magnetic permeability of ceramics. Indian journal of engineering & materials sciences, 6(1), 34-42.

International Proceedings

  • Pal, V., & Dwivedi R.K.(2015). Effect of Processing on Synthesis and Dielectric Properties of Lead free (Bi0. 98R0. 02) 0.5 Na0. 5TiO3 Ceramics. In IOP Conference Series: Materials Science and Engineering (Vol. 73, No. 1, p. 012121). IOP Publishing.
  • Pal, V., Kumar, A., Thakur, O. P., & Dwivedi R.K.(2016, May). Preparation, crystal structure and enhanced bipolar response of 0.90 BLNT-0.10 BCT lead-free piezoceramics., AIP Conference Proceedings (Vol. 1728, No. 1, p. 020571).
  • Singh, V., Sharma, S., Kumar, M., & Dwivedi R.K.(2014, April). Optical properties of Y and Ti co-substituted BiFeO3 multiferroics, AIP Conference Proceedings (Vol. 1591, No. 1, pp. 622-624).
  • Sharma, S., Singh, V., & Dwivedi R.K.(2014, April). Structural, vibrational and dielectric studies of (0.95) Pb(Zr xTi1− x)O3-(0.05) BiFeO3 nanoceramics, AIP Conference Proceedings (Vol. 1591, No. 1, pp. 680-682).
  • Singh, V., Subhash, Dwivedi R.K., & Kumar, M. (2013, February). Structural and optical properties of Pr doped BiFeO3 multiferroic ceramics, AIP Conference Proceedings (Vol. 1512, No. 1, pp. 462-463).
  • Sharma, S., Singh, V., & Dwivedi R.K.(2013, June). Structural, optical and dielectric properties of (0.95) PbZr0.52Ti0.48O3−(0.05) BiFeO3 solid solution, AIP Conference Proceedings (Vol. 1536, No. 1, pp. 849-850).
  • Singh, V., Sharma, S., Kumar, M., & Dwivedi R.K.(2013, June). Synthesis and optical properties of Y3+ doped BiFeO3 multiferroics., AIP Conference Proceedings (Vol. 1536, No. 1, pp. 1027-1028).
  • Pal Vijayeta Pal and Dwivedi R.K. 2012. Dielectric properties of La modified BNT Ceramics for MEMS Applications, International conference on Smart Structures and Smart Systems (ISSS-2012), IISc  Bangalore, P-27,
  • Agrawal S. L, Dwivedi R.K. and Singh R.P.  (1991, Feb.).  Thermally deposited WO3 thin film for PEC applications, VIth International conference on Photo Voltaic Science and Engineering, NPL, New Delhi, Pp. 321-324.

International Conferences

  • Pal Vijayeta and Dwivedi R.K. 2013. Structural, micro structural and ferroelectric properties of (BiNd)0.5(NaTi)0.5O3 ceramics , IUMRS-ICA - 2013, IISc Banglore Dec. 17-20, 2013.
  • Jha Pardeep and Dwivedi R. K. 2012. A comparative study of dielectric and magnetic   properties of nano bismuth ferrite, International Conference and Workshop on Nanostructured Ceramics and Other Nanomaterials (ICWNCN-2012), P-348, March13-16, 2012, University of Delhi, Delhi, India
  • JhaPriyanka, A. K. and Dwivedi R. K. 2012. Structural and electrical characterization of 0.6BZT-0.4BFO solid solutions, International Conference and Workshop on Nanostructured Ceramics and other Nanomaterials, (ICWNCN-2012) March13-16, 2012, p-347, University of Delhi, Delhi, India.
  • Subhash and  Dwivedi R.K. 2012. Structure and dielectric behaviour of (1-x)Pb(Zr0.52Ti0.48)-xBiFeO3 system,  International Conference and Workshop on Nanostructured Ceramics and other Nanomaterials,  (ICWNCN-2012) p-424, March13-16, 2012, University of Delhi, Delhi, India.
  • Jha Pardeep and Dwivedi R.K. 2011. Effect of Milling duration on electrical properties of nano bismuth ferrite by high energy ball milling”, International Conference on Nanomaterials and Nanotechnology (ICNANO-2011), p-196 , Dec.18-21, 2011, University of Delhi.                                     
  • Baboo S., Dwivedi R.K., Kumar Ravi, and Prakash Om, 2009.  High frequency dielectric relaxation in Ba1-xBixTi1-xFexO3 system, International conference on Electro-Ceramics, p-179, Dec.13-17, 2009, Delhi University.                                                                                                                           
  • Kumar Arvind, Baboo S., Prakash Om and Dwivedi R.K. 2009. Studies on Impedance Spectroscopy of Ba1-xBixTi1-xFexO3 system”, International conference on Electro-Ceramics, p-183, Dec.13-17, 2009, Delhi University.                                                                                                                
  • KumarPawan, Prasad,  Ravikant, SiwachP. K., Singh H. K. and DwivedR. K. 2009. Structural and transport properties of B-site Cu doped La0.80Sr0.20MnO3 thin film on LaAlO3 by spray Pyrolysis, International conference on electro-ceramics,  p-292,Dec. (2009), Delhi University.
  • Gupta1 Anubha, KumarPawan, Prasad Ravikant, Singh H. K. and DwivediR. K. 2009. Compositional tuning of magneto-transport properties in Pb doped NdMnO3, International conference on electro-ceramics, p-373, Dec. 2009, Delhi University.                                                                
  • Parkash Om, Baboo S., Dwivedi R.K., Kumar Ravi and Kumar D. 2009. Ferroelelectric to paraelectric transition in the system Ba1-xLaxTi1-xCrxO3, International conference on Materials for advanced Technologies, p-D117, Jun 29-Jul.3, 2009, NUS Singapore.                                                         
  • Kumar Pawan, Singh Vikash, Dwivedi R.K., Prasad R. and Singh H.K. 2009. Magneto-electrical studiesin LSMO –BTO bulk and nano composites, International conference on Materials for advanced Technologies, p-D117, Jun 29-Jul.3, 2009,  NUS Singapore.                                           
  • Mishra S.K., Nyati G.R., Achar P.C., Agarwal Nikhil and Dwivedi R.K. 2007. Archival life of phase change re-writable compact optical discs I – Effect of nitrogen” (In collaboration with Moser Baer India Ltd.), International workshop  on Advanced Materials and Technologies for Nano and Oxide Electronics (AMNTOE-2007), Feb. 19 – 22, IIT Delhi 2007.                                        
  • DwivediR.K., Parkash Om and Kumar, D.2007. Dielectric relaxation in valence compensated  (Sr0.50Ca0.15La0.35)(Ti0.65Co0.35)O3 perovskite oxide,  International workshop on Advanced Materials and Technologies for Nano and Oxide Electronics (AMNTOE-2007), Feb, 19 – 22, IIT Delhi.                         
  • Dwivedi R.K.2006. International conference on Nano materials for electronics, Nov. 27 – 29, 2006, C-MET Pune.                                                                            
  • Dwivedi R.K., Kumar D. and Parkash Om, 2006. Dielectric characterization of La and Cr substituted barium titanate  perovskite oxide, International symposium on Advanced Functional Materials-2006 (AFM-06), IIT Bombay, Feb.9-10, 2006.                                                                                 
  • Dwivedi R.K.and Bahadur D. 2006. Nano synthesis of lead doped neodymium manganite powder and characterization, International conference on Nano science and Technology (ICONSAT-06), Mar.,16-18, 2006, IIT Delhi.                                                                                             
  • Dwivedi R. K., Kumar Devendra, Parkash Om, Pandey L. and Srivastav K.K. 1998. Effect of processing route on dielectric behaviour of valence compensated Sr0.50Ca0.15La0.35Ti0.65Co0.35O3 ceramic, CIMTEC-98, World Ceramic Conference and Forum on New Materials, Faenza Italy, Jun.14-19, 1998.

National Conferences

  • Jha Pardeep and Dwivedi R.K. 2011. Electric cal characterization of  Nano Bismuth Ferrite”, 2nd National Conference on Advanced Materials and Radiation Physics (AMRP-2011),  SLIET, Sangrur, p-21, Nov. 04-05.
  • Pal Vijayeta, Dwivedi R.K. and Thakur O.P. 2010. Ferroelectric Behavior in (Bi1-xLax)0.50Na0.50TiO3 Ceramics”, 16th  National Conference of Dilectrics and Ferroelectrics (NSFD-XVI), held at GGU Bilashpur, Dec. 02-04,.
  • Dwivedi R.K.2007. Attended National workshop on Smart materials for the design of intelligent systems by IIT Kanpur, 23-24th March, (Invitee).
  • Dwivedi R.K., Nigam A.K. and Bahadur D. 2002. Magnetic instability inNd0.50Sr0.50Mn1-xCrxO3 system, National seminar on “Research in Advanced Inorganic Materials ( RAIM-02), organized at IITB Mumbai, Dec. 7-8.
  • Dwivedi R. K. 2001.  Attended a Workshop on “Advanced Materials” organized at JNCASR, Bangalore, India, Dec. 3-4.
  • Dwivedi R.K., Parkash Om and Kumar D. 2000. Structural studies of CaTiO3 – LaCrO3 solid solution perovskite oxide (Published in Proceedings), SRTCRA – 2000, IACS, Sept. 16-17, Jadavpur, Calcutta.
  • Dwivedi R. K., Parkash Om and Kumar Devendra, , 2000. AC conduction behavior in valence compensated Ca1-xLaxTi1-xCrxO3 ceramic system, XIth Annual General Meeting MRSI, Baroda Gujarat, Feb.3-5.
  • Dwivedi R. K., Parkash Om and Kumar Devendra, 1999 . Compositional dependence of ferroelectric to paraelectric phase transition in BaTiO3 – LaCrO3 solid solution, Symposium for condensed Matter Physics,  Jadavpur Calcutta, India, Dec. 4-6.
  • Srivastav K.K., Dwivedi R. K., Kumar Devendra and Parkash Om, 1999. Electrical conduction behaviour of valence compensated system BaSn1-xCoxO3, National Seminar on Ceramic engineering – challenges of 21st Century, Institute of Technology, BHU, India, Feb.18 - 19.
  • Dwivedi R. K., Kumar Devendra and Parkash Om, 1999 . Paraelectric to ferroelectric transition in valence compensated perovskite system Ba1-xLaxTi1-xMnxO3, National Seminar on Ceramic engineering – challenges of 21st Century, Institute of Technology, BHU, Feb. 18-19.
  • Dwivedi R. K., Pandey L., Kumar Devendra and Parkash Om, 1999, Impedance spectroscopic studies in Sr0.50Ca0.15La0.35Ti0.65Co0.35O3 ceramic, Xth Annual General Meeting MRSI, RRL Bhopal, Feb. 9-11.  
  • Dwivedi R. K., K.K. Srivastav, Devendra Kumar and Om Parkash, 1999. Low temperaturedielectric behaviour in valence compensated perovskite Ba1-xLaxTi1-xCrxO3 system, Xth Annual General Meeting MRSI,  RRL Bhopal, Feb. 9-11.
  • Dwivedi R.K., Christopher C.C., Kumar Devendra and Parkash Om, 1996. Barrier layer formation in the system Sr1-xLaxTi1-xCoxO3, VIIIth National Seminar on Ferroelectrics and Dielectrics, Nagpur, Oct. (Best paper presentation award).
  • Dwivedi R.. K., Kumar Devendra, Pandey L. and Parkash Om, 1998. Dielectric behaviour in valence compensated system Ba1-xLaxTi1-xCrxO3, IXth National Seminar on Ferroelectrics and Dielectrics, NPL New Delhi, October 7-11.
  • Dwivedi R. K., Kumar Devendra and Parkash Om, 1998. Synthesis, structure and dielectric behaviour in valence compensated Ca1-xLaxTi1-xCrxO3 system, IXth Annual General Meeting, MRSI, IIT Chennai, February 11-13.