引用本文:
李东升, 吴淑荣, 熊为淼, 王文亮. BaTiO3基PTCR陶瓷材料的Sol-Gel制备方法的改进[J]. 应用化学,
2002, 19(10): 932-935.
Citation: LI Dong-Sheng, WU Shu-Rong, XIONG Wei-Miao, WANG Wen-Liang. An Improved Sol-Gel Method for Preparation of BaTiO3-based PTCR Ceramic Materials[J]. Chinese Journal of Applied Chemistry, 2002, 19(10): 932-935.
Citation: LI Dong-Sheng, WU Shu-Rong, XIONG Wei-Miao, WANG Wen-Liang. An Improved Sol-Gel Method for Preparation of BaTiO3-based PTCR Ceramic Materials[J]. Chinese Journal of Applied Chemistry, 2002, 19(10): 932-935.
BaTiO3基PTCR陶瓷材料的Sol-Gel制备方法的改进
English
An Improved Sol-Gel Method for Preparation of BaTiO3-based PTCR Ceramic Materials
Abstract:
The BaTiO3-based PTCR(Positive Temperature Coefficient Resistant) nanopowder was prepared by a modified sol-gel process. XRD, DSC, SEM and BET techniques were used to investigate the characteristics of the nanopowder and their effects on the properties ceramics thereof. The results showed that the sphere-shaped nanopowder of narrow size distribution has an average crysta llite size of 30~40 nm with specific surface area 26.20 m2/g. Its crystal structure is cubic perovskite phase at room temperature. The nanopowder was pressed into pellets and sintered by an improved technique to fabricate PTCR ceramic materials with much better electrical properties than that reported in the previous paper.
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Key words:
- BaTiO3
- / positive temperature coefficient resistant
- / sol-gel process
- / nanopowder
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