Effect of Microwave Sintering on Electrical Properties of PLZT Ceramics

doi:10.15541/jim20140431

Abstract

Abstract:

Lead lanthanum zirconate titanate(PLZT) powders synthesized by partial co-precipitation method were used to fabricate PLZT ceramics by conventional muffle furnace or by microwave muffle furnace. The crystal structure, microstructure, electrical properties of PLZT ceramics prepared by these two methods were investigated. The results show that the PLZT ceramics sintered by these two methods are pure perovskite structure. Microwave sintered PLZT ceramics possess smaller grain, more uniform size and less holes than do the conven tional prepared. The microwave sintering temperature is much lower than that by the conventional method, and the duration time is also much less, while the electrical properties of the ceramics sintered by these two methods are similar. The best properties of PLZT ceramics can be gained by microwave sintering at 1000℃ with dielectric constant and piezoelectric constant of 2512 and 405 pC/N. The remnant polarization is 16.5 kV/cm, and the coercive field is 8.2 μC/cm². The dielectric constant and piezoelectric constant of PLZT ceramics sintered by conventional method at 1250℃ reach the maximum values of 2822 and 508 pC/N. The remnant polarization is 21.6 kV/cm and the coercive field is 9.6 μC/cm².

null

Key words: lead lanthanum zirconate titanate, microwave sintering, piezoelectric, dielectric

CLC Number:

TQ174

LONG Lian-Jun, XU Jian-Mei, GONG Yan-Sheng, WU Ming-Yang, CUI Xin-You. Effect of Microwave Sintering on Electrical Properties of PLZT Ceramics[J]. Journal of Inorganic Materials, 2015, 30(5): 500-504.

References

[1] ROCA R A, BOTERO E R, GUERRERO F, et al. Grain growth kinetics and electrical properties of lanthanum modified lead zirconate titanate?(9/65/35) based ferroelectric ceramics. Journal of Applied Physics, 2009, 105(1): 014110.
[2] XU L, CHEN W, ZHOU J, et al. Fabrication and performance of lead lanthanum zirconate titanate piezoelectric ceramic fibre. Journal of the Chinese Ceramic Society, 2010, 38(3): 419–424.
[3] DE QUEIROZ T B, MOHR D, ECKERT H, et al. Preparation and structural characterization of rare-earth doped lead lanthanum zirconate titanate ceramics. Solid State Sciences, 2009, 11(8): 1363–1369.
[4] GOVINDAN A, SHARMA A, PANDEY A K, et al. Piezoelectric and pyroelectric properties of lead lanthanum zirconate titanate (PLZT) ceramics prepared by sol gel derived nano powders. Indian Journal of Physics, 2011, 85(12): 1829–1832.
[5] WEI WEI, YAO PINGPING, LUO FENGHUA. Study on microstructures and properties of PLZT piezoelectric ceramics at MPB. Powder Metallurgy Technology, 2010, 28(30): 163–166.
[6] LONKAR C M, KHARAT D K, KUMAR H H, et al. Effect of La on piezoelectric properties of Pb(Ni1/3Sb2/3)O3-Pb(ZrTi)O3 ferroelectric ceramics. Journal of Materials Science: Materials in Electronics, 2013, 24(1): 411–417.
[7] ZHU BAOCHENG, LI YUPING, GAO PENGZHAO. Effect of sintering method on microstructure and electrical properties of doped Lead zirconate titanate piezoelectric ceramics. Materials for Mechanical Engineering, 2011(11): 36–39.
[8] HEUGUET R, MARINEL S, THUAULT A, et al. Effects of the susceptor dielectric properties on the microwave sintering of alumina. Journal of the American Ceramic Society, 2013, 96(12): 3728–3736.
[9] WANG F, ZHOU X, YU J, et al. Development of microwave sintering of ceramic materials. Materials Review, 2011, 25(10): 28–31.
[10] GAO P, PU Y, WU Y, et al. A comparative study on positive temperature coefficient effect of BaTiO3-K0.5Bi0.5TiO3 ceramics by conventional and microwave sintering.?Ceramics International, 2014, 40(1Part A): 637–642.
[11] DEMIRSKYI D, CHENG J, AGRAWAL D, et al. Densification and grain growth during microwave sintering of titanium diboride. Scripta Materialia, 2013, 69(8): 610–613.
[12] CAI W, FU C, HU W, et al. Effects of microwave sintering power on microstructure, dielectric, ferroelectric and magnetic properties of bismuth ferrite ceramics. Journal of Alloys and Compounds, 2013, 554: 64–71.
[13] CHOCKALINGAM R, CHOCKALINGAM S, AMARAKOON V R W. The electrical properties of microwave sintered gadolinia doped ceria-alumina nano-composite electrolyte. Journal of Power Sources, 2011, 196(4): 1808–1817.
[14] ZHOU YUAN, LI YU-XIANG, ZHANG MEI, et al. Research progress on microwave technology and its application in piezoelectric materials. Bulletin of the Chinese Ceramic Society, 2012, 31(4): 896–904.
[15] LI BO, LIAO XIAOLING, ZHU XIANGDONG, et al. Preparation of porous carbonated hydroxyapatite nanoceramics based on microwave sintering approach. Journal of The Chinese Ceamic Society, 2011, 39(12): 29–34.
[16] RAJU K, VENUGOPAL REDDY P. Synthesis and characterization of microwave processed PZT material. Current Applied Physics, 2010, 10(1): 31–35.
[17] VASUDEVAN R, KARTHIK T, SELVAKUMAR D, et al. Effect of microwave sintering on the structural, optical and electrical properties of BaTiO3 nanoparticles. Journal of Materials Science: Materials in Electronics, 2014, 25(1): 529–537.
[18] OKAZAKI K, NAGATA K. Effects of grain size and porosity on electrical and optical properties of PLZT ceramics. Journal of the American Ceramic Society, 1973, 56(2): 82–86.