Al_2O_3对LiTaO_3陶瓷烧结性能和微观组织的影响  

Influence of Al_2O_3 Particles on Sintering Properties and Microstructure of LiTaO_3 Ceramics

作　　者：赵凯[1] 刘艳改[1] 房明浩[1] 黄朝晖[1] 姜斌[1] 安志彤 

机构地区：[1]中国地质大学矿物材料国家专业实验室,中国地质大学(北京)材料科学与工程学院,北京100083 [2]河北大唐国际王滩发电有限责任公司,河北唐山063611

出　　处：《稀有金属材料与工程》2007年第A01期295-297,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50602041);矿物材料国家专业实验室开放基金课题(A05003)

摘　　要：把Al2O3添加到LiTaO3陶瓷中,研究了Al2O3对LiTaO3陶瓷烧结性能的影响,通过制备Al2O3/LiTaO3复相陶瓷,对其微观结构和LiTaO3晶粒内的电畴结构进行了观察。研究结果表明:Al2O3的加入对LiTaO3陶瓷的烧结起到了烧结助剂的作用,随着Al2O3含量的提高,复相陶瓷试样的相对密度随之增大,实验中1300℃无压烧结制备的含有9%Al2O3(体积分数,下同)颗粒的Al2O3/LiTaO3复相陶瓷的致密度最高,组织结构更为致密。在Al2O3/LiTaO3复相陶瓷的LiTaO3晶粒中观察到了90°电畴。Al2O3/LiTaO3 composite ceramics were fabricated by adding Al2O3 particles into LiTaO3 ceramics. The influence of Al2O3 particles on sintering properties of LiTaO3 ceramics was studied. Also, the microstructure of Al2O3/LiTaO3 composite ceramics and domain configurations in LiTaO3 grains were investigated. The results showed that the addition of Al2O3 particles was contributed to the sintering of LiTaO3 ceramics as aid. With the increase of Al2O3 content, the relative density of Al2O3/LiTaO3 composite ceramics enhanced. The relative density of 9vol% Al2O3/LiTaO3 composite ceramic prepared by pressureless sintering at 1300 ℃ was the highest in the experiment. 90° domains were also observed in LiTaO3 grains in the prepared Al2O3/LiTaO3 composite ceramics.

关 键 词：Al2O3/LiTaO3复相陶瓷 烧结性能 致密度 微观组织 90°电畴 

分 类 号：TQ174[化学工程—陶瓷工业]