（毕业设计论文）《PTC特性对纳米基质BaTiO3及掺杂粒径的依赖性研究》.doc

编号 本科生毕业设计 PTC特性对纳米基质BaTiO3及掺杂粒径的依赖性研究 Matrix BaTiO3 PTC properties on nano particle size and the dependence of doping 学 生 姓 名 专 业 无机非金属材料科学与工程（光学材料） 学 号 指 导 教 师 学 院 材料科学与工程学院 2011年 6 月 摘 要 本文详尽地论述了制备BaTiO3基PTC热敏电阻陶瓷材料的工艺过程。着重讨论了掺杂粒径对PTC热敏电阻材料工艺性能的影响。并且分别以固相法和溶胶—凝胶法进行了系统研究。从理论上解释了两者对烧成制度及热敏电阻PTC特性的影响；比较深入地讨论了影响PTC热敏电阻材料特性的因素。 分别采用固相法和液相法工艺，以分析纯BaCO3和化学纯TiO2为原材料，适当掺杂Y等元素，制备出PTC陶瓷材料。并且通过实验探索了PTC热敏电阻材料的配方组成以及制备工艺对PTC热敏电阻陶瓷材料性能的影响，得出了两种制备方法下的不同工艺参数，为制备PTC陶瓷材料提供了比较可靠的工艺制度。 关键词:烧成温度 升阻比 电阻温度系数 掺杂 ABSTRACT This article discusses in detail the preparation of BaTiO3-based PTC thermistor ceramics process. Focused on the doping PTC thermistor material particle size on process performance. And solid phase respectively and sol - gel method has been systematically studied. Explained both theoretically and on the sintering characteristics of PTC thermistor; more in-depth discussion of the impact of PTC thermistor material properties of the factors. Respectively and the liquid phase solid state technology, with analytically pure BaCO3 and chemical pureTiO2 as raw materials, doped with Y and other elements appropriate to prepare the PTC ceramic material. Explored by experiments PTC thermistor materials composition and preparation of formulations PTC thermistor properties of ceramic materials, obtained under the two different preparation parameters for the preparation of PTC ceramic material provides a more reliable Process system. Key words: sintering temperature resistance temperature coefficient doping 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc295833203 摘 要 PAGEREF _Toc295833203 \h 1 HYPERLINK \l _Toc295833204 第一章 绪 论 PAGEREF _Toc295833204 \h 1 HYPERLINK \l _Toc295833205 1.1 引言 PAGEREF _Toc295833205 \h 1 HYPERLINK \l _Toc295833206 1.2 产生PTC效应的条件 PAGEREF _Toc295833206 \h 2 HYPERLINK \l _Toc295833207 1.3 PTC特性原理 PAGEREF _Toc295833207 \h 2 HYPERLINK \l _Toc295833208 第二章 PTC热敏电阻的制备及参数测试 PAGEREF _Toc295833208 \h 6 HYP