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85瓷的低温烧结及其介电性能
严嵩,唐媚,林聪毅,邹成龙,李蔚,赵文茹
0
(华东理工大学材料科学与工程学院, 上海 200237;上海三思电子工程有限公司, 上海 200050)
摘要:
通过添加多元助剂降低85瓷的烧结温度,并探讨了TiO2与CaO质量比的变化对85瓷致密化过程、结构及介电性能的影响。结果发现,添加多元助剂可以有效降低85瓷的烧结温度至1 350 ℃,适当调节TiO2与CaO的质量比可进一步提高其致密度,当m(TiO2):m(CaO)=0.5时,85瓷在相同温度下烧结的致密度最高。研究同时发现,通过调节TiO2与CaO的质量比,85瓷的介电常数在8.0~8.8的区间内能可控地调节,其变化规律与密度变化趋势一致;另一方面,85瓷的Q×f值较低,且其变化与密度无关,可能与烧结助剂较多且其成份变化较复杂有关。
关键词:  85瓷  低温烧结  介电性能
DOI:10.14135/j.cnki.1006-3080.2017.03.009
投稿时间:2016-09-13
基金项目:
Low Temperature Sintering and Dielectric Properties of 85 Alumina Ceramic
YAN Song,TANG Mei,LIN Cong-yi,ZOU Cheng-long,LI Wei,ZHAO Wen-ru
(School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China;Shanghai Sansi Electronics Engineering Co. Ltd, Shanghai 200050, China)
Abstract:
Using multicomponent additives,85 alumina ceramics were sintered at a relatively low temperature.The effects of TiO2/CaO ratio on the densification,structure and dielectric properties of Al2O3 ceramics were investigated.It is found that the appropriate multiomponent additives can reduce the sintering temperature of 85 alumina ceramics to 1 350℃ and the bulk density can be increased by changing TiO2/CaO ratio where the maximum density reaches at the TiO2/CaO ratio of 0.5.Besides,by adjusting the ratio of TiO2/CaO,the dielectric constant can be controlled between 8.0-8.8 and the variation of dielectric constant has the same trend with that of the bulk density.On the other hand,the Q×f values of 85 alumina ceramics are low and their change trend has nothing to do with the dielectric constant,which is probably due to the large amount and complex composition of the sintering additives.
Key words:  85 alumina ceramics  low temperature sintering  dielectric properties

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