摘要
采用一次烧成工艺制备了 Mn掺杂的 Sr Ti O3电容 -压敏复合功能陶瓷 ,采用 SEM观察了 Sr Ti O3复合功能陶瓷的微观结构 ,测量了不同氧化热处理温度下 Sr Ti O3陶瓷的电学特性 ,采用 XPS研究了 Sr Ti O3复合功能陶瓷中 Mn的化学状态 ,并分析了 Mn的掺杂行为。研究结果表明 :一次烧成的 Sr Ti O3陶瓷达到较高的烧成致密度 ,Mn主要以 Mn2 + 的形式存在于晶界。氧化热处理过程中 Mn低价取代晶粒表面的 Ti4+ ,对于 Sr Ti O3陶瓷中产生复合功能特性具有重要影响。
Mn doped SrTiO 3 capacitor varistor multifunction ceramics were fabricated by a single sintering process.The microstructure of the ceramics was investigated by SEM,and the electrical properties of the ceramics with different oxidizing annealing temperatures were measured.XPS was used to examine the chemical condition of Mn in the ceramics.Moreover,the doping behavior of Mn during the single sintering was analyzed.The results indicate that dense microstructures were produced in the single sintered ceramics,in which Mn is mainly in form of Mn 2+ ions.The substitution of Mn segregating at grainboundaries for Ti 4+ ions on grain surfaces during the oxidizing annealing contributes greatly to the generation of multifunction characteristics in the ceramics.
出处
《压电与声光》
CSCD
北大核心
2000年第6期401-404,共4页
Piezoelectrics & Acoustooptics
基金
武汉工业大学材料复合新技术国家重点实验室开放基金资助项目
关键词
复合功能
一次烧成
锰
钛酸锶陶瓷
半导体陶瓷
SrTiO_3 ceramics
capacitor varistor multifunction
single sintering process
Mn
doping
