文献类型：期刊文献

中文题名：纳米MgTiO3对Mg(Ca)TiO3微波介质陶瓷烧结行为及介电性能的影响

英文题名：Effects of Nano-Scale MgTiO_3 on Sintering Behavior and Dielectric Properties of Mg(Ca)TiO_3 Microwave Dielectric Ceramics

作者：郭娜[1];胡一晨[1];王中俭[1];徐杰[1];夏冬[1]

机构：[1]华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海市先进聚合物材料重点实验室,上海200237

年份：2010

卷号：36

期号：4

起止页码：535

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：上海市重点学科和重点实验室项目(B502、08DZ2230500)

语种：中文

中文关键词：微波介质陶瓷;溶胶-凝胶法;低温烧结;介电性能

外文关键词：microwave dielectric ceramics; sol-gel method; low temperature sintering; dielectric prop erties

摘要：为了降低MgTiO3-CaTiO3陶瓷体系的烧结温度,以钛酸丁酯、醋酸镁为原料,采用溶胶凝胶法制备MgTiO3陶瓷纳米粉体。通过DTA、XRD、FT-IR、SEM等观察到纳米MgTiO3陶瓷粉体颗粒分布均匀,粒度约为100 nm,并且成相良好。以MgTiO3纳米粉体按不同比例掺入固相合成的MgTiO3-CaTiO3陶瓷体系中,并对该纳米复相陶瓷的烧结性能和介电性能进行了研究。结果表明:当MgTiO3纳米粉体的掺杂摩尔分数为20%时,体系的烧结温度从1 350℃降至1 250℃,体积密度达到理论密度的97%以上,并且具有良好的介电性能:rε=19.3,tanσ=1.31×10-3(1.23 MHz)。
To lower the sintering temperature of MgTiO3-CaTiO3 ceramics, nano-scale magnesium titanate powder was synthesized by sol gel method, using butyl titante and magnesium nitrate as precursors. The properties of the dried powder were examined by DTA, XRD, FT-IR and SEM. The powder particles were uniformly distributed with average size of 100 nm. The effects of nano-scale MgTiO3 powder additive on sintering behavior and microwave dielectric properties of as-synthesized MgTiO3- CaTiO3 were investigated. Results showed that when 20% （mol fractcon） nanometer MgTiO3 powder was added, the sintering temperature of MgTiO3-CaTiO3 was reduced from 1 350 ℃ to 1 250 ℃, while the bulk density reached 97% of the theoretical value. Excellent dielectric properties were achieved with dielectric constant εr of 19.3, and loss tan a of 1.31×10^-3（1.23 MHz）.