改进的工艺路线制备化学计量比的PZN基钙钛矿陶瓷(英文)  

Stoichiometric PZN-Based Perovskite Ceramics Prepared by Modified Processing Route

作　　者：云斯宁[1] 王晓莉[1] 

机构地区：[1]西安交通大学理学院,陕西西安710049

出　　处：《稀有金属材料与工程》2006年第A02期267-271,共5页Rare Metal Materials and Engineering

基　　金：Supported by the National Nature Science Foundation of China(50272052)

摘　　要：采用改进的工艺路线制备了化学计量比的Pb(Zn1／3Nb2/3)O3-PbTiO3-BaTiO3陶瓷,二氧化钛和碳酸钡不经过预烧,与预反应粉体混合球磨,成型后直接烧结,在1100℃和1120℃分别保温1 h,2 h,4 h获得了100％钙钛矿结构的PZN-PT-BT陶瓷,最大密度7．418 g／cm3,最大介电常数7672。Stoichiometric Pb（Zn1/3Nb2/3）O3-PbTiO3-BaTiO3（PZN-PT-BT） perovskite ceramics prepared by modified processing route were investigated. Without calcination of TiO2 and BaCO3, a mixture of pre-reaction powders （PbO＋ZnNb2O6） and TiO2 and BaCO3 was pressed and sintered directly. Stoichiometric PZN-PT-BT ceramics sintered at 1100℃ and 1120℃ for 1, 2 and 4 h, respectively, with 100% perovskite phase were obtained. PZN-PT-BT ceramics with density 7.418 g/cm^3 （92.6% of theoretical density 8.01 g/cm^3） and dielectric constant Kmax, 7672 at 1 kHz were prepared. As far as energy-saving and time-saving of processing are concerned, it is a simplified and effective route to prepare PZN-PT-BT ceramics.

关 键 词：PZN-PT-BT陶瓷 预烧 改进的工艺 介电性能 

分 类 号：TM28[一般工业技术—材料科学与工程]