物理化学学报 >> 2000, Vol. 16 >> Issue (12): 1067-1072.doi: 10.3866/PKU.WHXB20001203

研究论文 上一篇    下一篇

微波场对SrTiO3化学合成中热过程的影响

刘韩星, 赵世玺, 刘志坚, 欧阳世翕   

  1. 武汉工业大学材料复合新技术国家重点实验室 武汉 430070
  • 收稿日期:2000-03-05 修回日期:2000-06-05 发布日期:2000-12-15
  • 通讯作者: 刘韩星 E-mail:LHXHP@public.wh.hb.cn

Study on the Influence of Microwave Field on Heating in SrTiO3 Synthesis

Liu Han-Xing, Zhao Shi-Xi, Liu Zhi-Jian, Ouyang Shi-Xi   

  1. State Key Labratory of Advanced Technology for Materials Synthesis and Processing,Whhan University of Technology,Wuhan 430070
  • Received:2000-03-05 Revised:2000-06-05 Published:2000-12-15
  • Contact: Liu Han-Xing E-mail:LHXHP@public.wh.hb.cn

摘要:

在分析微波场中SrTiO3化学合成体系与电磁场相互作用的基础上,探讨合成体系在微波场中的加热机制和影响升温的主要因素(如合成体系的介电性质、保温材料的结构、生还的致密度等),结果表明,TiO2和SrCO3在低温阶段对体系的升温速率的贡献相接近;高温阶段体系升温主要是TiO2的贡献,同时产物对升温有较大的影响。微波合成与常规合成再加热方式上的明显不同,对合成过程、合成时间等影响较大。

关键词: SrTiO3, 微波加热, 介电性质, 固体化学合成

Abstract:

Base on the analyses of the interaction between synthesis system materials and microwave field,the heating mechanism in the microwave field was studied.The heating rates of the synthesissystem were mainly determined by SrCO3 and TiO2 during low temperature range,and by TiO2 and SrTiO3 at high temperatures.The results show that the heating effects in microwave field are guite different from that in conventional furnace.The heating effect of the system in the microwave field which was influenced by several factors including dielectric properties of the synthesis's system and thermal insulate structures was discussed in detail.

Key words: SrTiO3, Microwave heating, Dielectric property, Solid chemical reaction