微波烧结对PLZT陶瓷电学性能的影响

doi:10.15541/jim20140431

无机材料学报 ›› 2015, Vol. 30 ›› Issue (5): 500-504.DOI: 10.15541/jim20140431 CSTR: 32189.14.10.15541/jim20140431

微波烧结对PLZT陶瓷电学性能的影响

龙廉骏¹, 徐建梅¹, 公衍生¹, 武明阳¹, 崔新友²

(1. 中国地质大学(武汉) 材料与化学学院, 武汉 430074; 2. 武汉烽火富华电气有限责任公司, 武汉 430074)

收稿日期:2014-08-25 修回日期:2014-11-11 出版日期:2015-05-20 网络出版日期:2015-04-28
作者简介:龙廉骏(1990–), 男, 硕士研究生. E-mail: xlong627@126.com
基金资助:
国家自然科学基金(61271141); 武汉市应用基础研究项目(2015010101010009)

Effect of Microwave Sintering on Electrical Properties of PLZT Ceramics

LONG Lian-Jun¹, XU Jian-Mei¹, GONG Yan-Sheng¹, WU Ming-Yang¹, CUI Xin-You²

(1. Faculty of Materials and Chemistry, China University of Geosciences(Wuhan), Wuhan 430074, China; 2.?Wuhan FiberHome Fuhua Electric Co., Ltd, Wuhan 430074, China)

Received:2014-08-25 Revised:2014-11-11 Published:2015-05-20 Online:2015-04-28
About author:LONG Lian-Jun. E-mail: xlong627@126.com
Supported by:
National Natural Science Foundation of China(61271141); Wuhan Basic Researchfor Application(2015010101010009)

摘要/Abstract

摘要：

采用部分共沉淀法制备锆钛酸铅镧(PLZT)粉体, 分别用普通马弗炉和微波马弗炉进行烧结成瓷, 对比分析不同烧结方法对PLZT陶瓷的晶体结构、微观形貌和电学性能的影响。结果表明: 微波烧结和常规烧结均成功制备出钙钛矿相PLZT陶瓷。采用微波烧结得到的PLZT陶瓷样品比常规烧结的晶粒细小, 尺寸更均匀, 孔洞较少; 在电学性能相近时, 微波烧结温度远低于常规烧结, 且保温时间远小于常规烧结。在1000℃进行微波烧结, 陶瓷的介电常数ε_r和压电常数d₃₃最大, ε_r为2512, d33为405 pC/N, 此时, 剩余极化强度为16.5 kV/cm, 矫顽场为8.2 μC/cm²; 在1250℃常规烧结, 陶瓷的介电常数最大, 为2822, 压电常数最大, 为508 pC/N, 剩余极化强度为21.6 kV/cm, 矫顽场为9.6 μC/cm²。

null

关键词: 锆钛酸铅镧, 微波烧结, 压电性能, 介电性能

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.

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

中图分类号:

TQ174

龙廉骏, 徐建梅, 公衍生, 武明阳, 崔新友. 微波烧结对PLZT陶瓷电学性能的影响[J]. 无机材料学报, 2015, 30(5): 500-504.

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.

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微波烧结对PLZT陶瓷电学性能的影响

Effect of Microwave Sintering on Electrical Properties of PLZT Ceramics

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