WO_3-B_2O_3复合掺杂钛酸锌陶瓷的低温烧结和相转变  

Phase-transformation and Low-temperature Sintering of WO_3 and B_2O_3 Doped Zinc Titanate Ceramics

作　　者：刘向春[1] 高峰[1] 田长生[1] 

机构地区：[1]西北工业大学材料学院,西安710072

出　　处：《无机化学学报》2006年第11期1982-1988,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.60501015);西北工业大学博士论文创新基金(No.CX200408)资助项目。

摘　　要：采用传统氧化物混合法结合半化学工艺制备了钛酸锌陶瓷,研究了WO3-B2O3复合掺杂对陶瓷低温烧结行为、低烧机制和相转变的影响。研究结果表明:WO3-B2O3掺杂将陶瓷烧结温度从1100℃降至900℃;WO3和B2O3的降温机制不同,前者主要是固相反应烧结机制,而后者应为液相烧结机制;WO3促进了六方相ZnTiO3的分解,对其原因进行了探讨;测试了不同频段下试样的介电性能,发现不同频段下,极化机制不同。Zinc titanate ceramics were prepared by conventional mixed-oxide method combined with a semichemical processing. The effects of WO3-B2O3 addition on the low-temperature sintering behavior and phasetransformation of zinc titanate ceramics were studied; and low-temperature sintering mechanism was suggested. The results show that the firing temperature of zinc titanate ceramics can be reduced from 1 100 to below 900 ℃ by WO3-B2O3 addition. The low-temperature sintering mechanism of WO3 is different from that of B2O3, the former one is believed to be corresponding to the solid phase reaction, while the latter is related to liquid phase sintering mechanism. WO3 accelerates the decomposition of hexagonal ZnTiO3 phase, the reason for which was investigated. The dielectric properties of zinc titanate ceramics were measured at different frequencies, and the results indicate that the main polar behavior varies with the frequency.

关 键 词：钛酸锌 半化学法 低温烧结 相转变 

分 类 号：O614.411[理学—无机化学] O614.241[理学—化学]