文献类型：期刊文献

中文题名：烧结工艺对纳米SrTiO_3陶瓷介电性能的影响

英文题名：Effects of Sintering Technology on Dielectric Properties of Nanocrystalline SrTiO_3 Ceramics

作者：徐云龙[1];余蓉蓉[1];钱秀珍[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200237

年份：2005

卷号：24

期号：2

起止页码：16

中文期刊名：电子元件与材料

外文期刊名：Electronic Components And Materials

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD_E2011_2012】；

基金：上海市重点学科建设资助项目;上海微纳科技有限公司资助项目

语种：中文

中文关键词：无机非金属材料;钛酸锶陶瓷;烧结工艺;介电性能;纳米SrTiO3陶瓷

外文关键词：inorganic non-metallic materials; SrTiO_3 ceramic; sintering technology; dielectric properties

摘要：采用 sol-gel 方法制备 SrTiO_3陶瓷粉体,利用 TG-DTA 分析 SrTiO_3干凝胶粉的分解、化合反应,初步确定了SrTiO_3陶瓷预烧和烧结温度,采用 SEM 研究了 SrTiO_3陶瓷的内部结构,重点探讨了不同烧结制度对 SrTiO_3陶瓷介电性能的影响。研究表明,当采用在空气气氛下以 5 ℃/min 的升温速率直接升温至 1 000℃,保温 0.5 h,再降温至 750℃保温 0.5 h 后随炉冷却的烧结工艺,SrTiO_3陶瓷纯度高,致密性好,晶粒粒径小于 100 nm,且具有良好的介电性能,低频下相对介电常数高达 3 000 左右。
SrTiO3 ceramic powders were prepared by sol-gel method, Decomposition and synthesis behaviors of the compound of SrTiO3 dry-gel powders were analyzed by TG-DTA. And calcine and sintering temperature was confirmed initially. Interior structure of SrTiO3 ceramic was studied by SEM. The effects of different sintering systems on dielectric properties of SrTiO3 ceramic were mainly discussed. The results indicate that the high quality, including high purity, good compact degree, its grain size is less than 100 nm, and in low- frequency its dielectric constant can be higher than 3 000 or so. SrTiO3 ceramics which have good dielectric characteristics can be obtained by the sintering system, as follows: sintering temperature is 1 000℃ for 0.5 h, rate of ascending temperature is 5℃/min, directly promoting temperature under air atmosphere, falling temperature system is to cool 750℃ for 0.5 h with furnace cooling, then reducing to the room temperature.