【摘要】 采用化学法结合传统的氧化物固相烧结法合成钛酸锌(ZnTiO3)粉体,掺杂V2O5作为烧结助剂降低陶瓷的烧结温度,研究了原料活性对钛酸锌陶瓷低温烧结的影响,以及V2O5对钛酸锌陶瓷低温烧结行为和微结构的影响。结果表明:钛酸锌陶瓷低温烧结对所选取的原料极为敏感,TiO2对陶瓷烧结影响很大;V2O5有效的将钛酸锌陶瓷的烧结温度从1100℃降到875℃,900℃烧结样品的相对密度达96．1％;同时,V2O5的加入降低了六方相ZnTiO3的分解温度,并导致晶粒异常长大;异相的产生严重影响了陶瓷的介电性能,在微波频段下,900℃烧结掺杂0．75％V2O5(质量分数,下同)钛酸锌陶瓷的Q×f=8873GHz,εr=21．3。更多还原

【Abstract】 Zinc titanate ceramics were prepared by conventional mixed-oxide method combined with a semi-chemical processing. The influences of raw materials upon the low-temperature sintering of ceramics and the effects of V2O5 addition on the microstructures and dielectric properties of ZnTiCh ceramics were investigated. The results showed that the low-temperature sintering of ceramics were very sensitive to raw materials, especially for TiO2. Another result showed that the densification temperature of ZnTiO3 ceramics could be reduced from 1100℃to 875℃with increasing of V2O5 addition. The phase transition temperature from hexagonal ZnTiO3 phase to cubic Zn2TiO4 was also lowed by adding of V2O5, and the presented second phase affected the dielectric properties of ceramics seriously. The quality factor (Q) of V2O5-doped zinc metatitanate-based ceramics in microwave region decreased significantly compared to that of the single-phase hexagonal ZnTiO3 ceramics, while the dielectric constant (εr) increased.更多还原