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首页> 外文期刊>Journal of materials science >Phase transitions of low-temperature sintering tungsten-doped ZnO-TiO_2 ceramics
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Phase transitions of low-temperature sintering tungsten-doped ZnO-TiO_2 ceramics

机译：低温烧结钨掺杂ZnO-TiO_2陶瓷的相变

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摘要

WO_3-doped zinc titanate ceramics were prepared by conventional mixed-oxide method combined with a chemical processing. The effects of WO_3 addition on the low-temperature sintering behavior, phase transition and dielectric properties of zinc titanate ceramics were investigated. The results show that the densification temperature of ZnTiO_3 ceramics can be reduced from 1150 to 900℃ with WO_3 addition and chemical processing. Small amount of WO_3 ( < 1.00wt %) accelerated the decomposition of hexagonal ZnTiO_3 phase to cubic Zn_2TiO_4 phase, while excessive addition (for example, 3.00wt %) restrained the decomposition. At the same time, the phase transition temperature from hexagonal ZnTiO_3 phase to cubic Zn_2TiO_4 is lowered by adding WO_3. WO_3 addition affects the dielectric properties of ceramics. The dielectric properties of WO_3-doped zinc titanate ceramics were measured at different frequencies. The results showed the decreasing tendency with the increasing measuring frequencies for both the dielectric constants and the loss tangents, and there existed the best dielectric properties for 1.0% WO_3-doped ceramics.
机译：WO_3掺杂钛酸锌陶瓷是通过常规的混合氧化物法结合化学工艺制备的。研究了WO_3的添加对钛酸锌陶瓷低温烧结行为，相变和介电性能的影响。结果表明，加入WO_3和化学处理可使ZnTiO_3陶瓷的致密化温度从1150降低至900℃。少量的WO_3（<1.00wt％）促进了六方晶ZnTiO_3相向立方Zn_2TiO_4相的分解，而过量的添加（例如3.00 wt％）则抑制了分解。同时，通过加入WO_3降低了六方晶ZnTiO_3相到立方晶Zn_2TiO_4的相变温度。 WO_3的添加会影响陶瓷的介电性能。在不同的频率下测量了WO_3掺杂的钛酸锌陶瓷的介电性能。结果表明，介电常数和损耗角正切均随测量频率的增加而减小，并且掺杂1.0％WO_3的陶瓷具有最佳的介电性能。

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