Nd(OH)_3-Co_3O_4-Nb_2O_5纳米复合掺杂BaTiO_3基陶瓷研究

Study of Nd(OH)_3-Co_3O_4-Nb_2O_5 nano-doped barium titanate ceramics

钛酸钡(BaTiO3)材料具有铁电、压电、热电、介电等特性,广泛用于制造高介电容器、热敏电阻和换能器等,特别是用作多层陶瓷电容器(MLCC)的基质材料。目前,MLCC向高可靠性、高比容(小尺寸大容量)、低成本的趋势发展。因此,制备高纯超细的BaTiO3粉体以及掺杂改性的研究,是该领域研究的热点。本文制备了Nd(OH)3、Co3O4和Nb2O5纳米粒子以及Nd(OH)3-Co3O4-Nb2O5纳米复合掺杂BaTiO3基陶瓷,研究了掺杂剂的粒径对BaTiO3基陶瓷的微观形貌和介电性能的影响。

Barium titanate（BaTiO3）is widely used in preparation of capacitance,thermal resistor,energy conversion device,for their exceptional ferroelectric,piezoelectric,pyroelectric and dielectric properties.Especially,it is mostly applied in making multilayer ceramic capacitor（MLCC） materials.At present,MLCC has a trend of high credibility,specific votume（small size and large capacity）and low cost.So,researchers have paid their attention to the preparation of high pure BaTiO3 nanopowders,and doped BaTiO3.In this paper,the monodisperse Nd（OH）3,Co3O4,Nb2O5 and nano complexly doped BaTiO3 ceramics was prepared and the effect of particle size of nano-dopant on the microstructure and dielectric properties of nano-doped BaTiO3 was investigated.