摘要
钛酸钡是一种非常重要的电子陶瓷材料．具有优异的介电、压电性能。它被广泛应用于制作体积小、容量大的微型电容器、多层基片、各种传感器、半导体材料、敏感元件和电子计算机的记忆元件等。但是，由于晶体结构的原因．使得BaTiO3的居里点偏高，即在120℃的居里点才有最大的介电常数值r约10^4），而室温下的介电常数仅为居里点的1／6（约为1800），从而大大影响了它的使用性能。根据理论推测，若BaTiO3中半径较大的Ba^2＋部分被半径较小的Sr^2＋取代．
Barium strontium titanate nanoparticles with spherical and rod-like morphologies were synthesized in water/Triton X-100/n-hexanol/cyclohexane quaternary reverse microemulsion solution. The influences of the molar ratio of water to surfactant （ω0） and the concentration of reactants on the morphology and size of barium strontium titanate nanoparticles were studied. The structure, compositions and morphology of the prepared products were characterized by XRD, SAED, ICP, EDS and TEM. The results show that the obtained Ba0.7Sr0.3TiO3 spherical nanoparticles with diameters of 20-100 nm and the Ba0.7Sr0.3TiO3 nanorods with diameters of 70-120 nm and lengths up to 600-800 nm are a single crystal, with a cubic phase. The molar ratio for barium, strontium and titanate in products is about 0.7：0.3：1.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2007年第3期558-562,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.50472080)
湖南省教育厅科学研究资助项目(No.06C829)
关键词
水
油微乳液
钛酸锶钡
纳米棒
W/O microemulsion
barium strontium titanate
nanorods
