稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2006年
z1期
267-271
,共5页
PZN-PT-BT陶瓷%预烧%改进的工艺%介电性能
PZN-PT-BT陶瓷%預燒%改進的工藝%介電性能
PZN-PT-BT도자%예소%개진적공예%개전성능
PZN-PT-BT%calcination%modified processing route%dielectric properties
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.
採用改進的工藝路線製備瞭化學計量比的Pb(Zn1/3Nb2/3)O3-PbTiO3-BaTiO3陶瓷,二氧化鈦和碳痠鋇不經過預燒,與預反應粉體混閤毬磨,成型後直接燒結,在1100℃和1120℃分彆保溫1 h,2 h,4 h穫得瞭100%鈣鈦礦結構的PZN-PT-BT陶瓷,最大密度7.418 g/cm3,最大介電常數7672.
채용개진적공예로선제비료화학계량비적Pb(Zn1/3Nb2/3)O3-PbTiO3-BaTiO3도자,이양화태화탄산패불경과예소,여예반응분체혼합구마,성형후직접소결,재1100℃화1120℃분별보온1 h,2 h,4 h획득료100%개태광결구적PZN-PT-BT도자,최대밀도7.418 g/cm3,최대개전상수7672.
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 TiO2and 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/cm3 (92.6% of theoretical density 8.01 g/cm3) 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.
