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化学学报
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化学学报 ›› 1999, Vol. 57 ›› Issue (7): 797-800. 上一篇    下一篇

研究论文

Ba~1~-~1~.~5~yLa~ySn~xTi~1~-~xO~3固溶体的合成、结构与性能

丁士文;翟永清;马广成;王志强;李金龙   

  1. 河北大学化学系.保定(071002)
  • 发布日期:1999-07-15

Synthesis, structure and properties of Ba~1~-~1~.~5~yLa~ySn~xTi~1~- ~xO~3 solid solutions

Ding Shiwen;Di Yongqing;Ma Ancheng;Wang Zhiqiang;Li Jinlong   

  1. Hebei Univ, Dept Chem.Baoding(071002)
  • Published:1999-07-15

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用软化学合成方法,在100^oC以下制备了一系列Ba~1~-~1~.~5~yLa~ySn~xTi~1~-~xO~3固溶体纳米粉末,XRD物相分析和d间距-组成图证明,产品为完全互溶取代固溶体.TEM观察,粒子为均匀球形,平均粒径70nm.通过制陶实验,分别测定了该系列固溶体的室温介电常数,结果发现,用化学方法在BaTiO~3中掺入适量锡和镧,引起T~c降低,当x=0.2,y=0.08时,室温介电数高达28000,比BaTiO~3纯相提高20倍.

关键词: 钛酸钡, 镧化合物, 锡化合物, 固溶体, 掺杂, 纳米相材料, Ｘ射线衍射分析, 介电常数

A series of Ba~1~-~1~.~5~yLa~ySn~xTi~1~-~xO~3 (0≤x≤0.3,0≤y≤0.3) solid solutions were synthesized by means of soft chemical method below 100^оC. XRD and d-spacing-component figures of the series of the solid solutions indicated that the products were substitutional ones. TEM showed that the product was substantially spherical particles with an average diameter of 70nm. The ceramics prepared from the solid solutions showed that adulterating with tin and lanthanum in pure BaTiO~3 phase obviously improved the dielectric constant at room temperature.

Key words: TITANIC ACID BARIUM, LANTHANUM COMPOUNDS, TIN COMPOUND, SOLID SOLUTION, DOPE, NANOPHASE MATERIALS, X-RAY DIFFRACTION ANALYSIS, DIELECTRIC CONSTANT

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