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MnO2掺杂LiTaO3陶瓷的烧结机理与力学性能
作者:王烨1 张有凤1 任江伟1 孔海娟1 陈学锋2 
单位:1. 上海工程技术大学材料工程学院 上海 201620  2. 中国科学院上海硅酸盐研究所 中国科学院无机功能材料与器件重点实验室 上海 200050 
关键词:烧结机理 二氧化锰掺杂 钽酸锂 硬度 
分类号:TQ17471
出版年,卷(期):页码:2018,46(12):0-0
DOI:10.14062/j.issn.0454-5648.2018.12.10
摘要:

 采用无压烧结法制备了添加MnO2粉末的LiTaO3基陶瓷复合材料,研究无压烧结后样品的显微组织和力学性能,结果表明:MnO2能够有效促进晶粒的长大,改善LiTaO3基陶瓷复合材料烧结性;1 300 ℃保温3 h无压烧结后,随着MnO2质量分数的增加,LiTaO3基陶瓷复合材料的烧结性增强,添加4% (质量分数) MnO2制备的陶瓷复合材料烧结性较好;陶瓷复合材料的收缩率和Vickers硬度都先增大后减小,并在4% MnO2时达到最大,分别为25.7%和392.5 MPa;MnO2在烧结后以Mn3O4的形式存在。

  LiTaO3 based ceramics with a manganese oxide powder were prepared via pressureless sintering. The microstructure and mechanical properties of the composites were investigated. The grain growth and sinterability of ceramics are promoted by adding MnO2. The sintering properties of LiTaO3 based ceramics sintered at 1 300 ℃ for 3 h increase with the increase of MnO2 content (in mass fraction). The optimum sinterability of ceramics prepared by adding MnO2 content of 4% can be obtained. The shrinkage of ceramic composites and the Vickers hardness first increase and then decrease, and the maximum values are 25.7% and 392.5 MPa when the MnO2 content is 4%. MnO2 presents as Mn3O4 after sintering.

基金项目:
国家自然科学基金(11604204;51603120),中国科学院无机功 能材料与器件重点实验室开放课题(KLIFMD201601),上海工 程技术大学研究生科研创新项目(17KY0518)。
作者简介:
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