Structural Transition and Microwave Dielectric Properties of ZnNb2O6–TiO2 Sintered at Low Temperatures
Structural Transition and Microwave Dielectric Properties of ZnNb2O6–TiO2 Sintered at Low Temperatures
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DOI：
10.1143/jjap.41.1465
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发表时间：
2002-03
影响因子：
1.5
通讯作者：
Dong‐Wan Kim;H. B. Hong;K. Hong
中科院分区：
文献类型：
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作者：
Dong‐Wan Kim;H. B. Hong;K. Hong
在ZnNb 2 O 6-TiO 2中加入CuO后，烧结温度显著降低至1200 °C，而未加入CuO的样品烧结温度为1200°C。利用X射线粉末衍射和网络分析仪研究了CuO对0.42ZnNb_2O_6 - 0.58TiO_2陶瓷相变和微波介电性能的影响。从铌铁矿和金红石到尖晶石的结构转变受烧结温度以及CuO的量的影响。然而，这些影响是相互竞争的。因此，可以认为，由于增加烧结温度或CuO的量，ZnNb_2O_6-TiO_2样品的晶体结构的不同构成导致微波介电性能的相当大的变化。由于相组成随组成的变化而变化，τf被修改为100 ppm/°C。
The addition of CuO to ZnNb2O6–TiO2 significantly lowered the sintering temperature to ∼900°C in comparison to ∼1200°C for samples without CuO. The effect of CuO additions on the phase transitions and microwave dielectric properties of 0.42ZnNb2O6–0.58TiO2 has been investigated using X-ray powder diffraction and a network analyzer. The structural transition from columbite and rutile to ixiolite was influenced by both the sintering temperature as well as the amount of CuO. These influences, however, were competing. Therefore, it is assumed that the different constitutions of crystal structure of ZnNb2O6–TiO2 samples due to increase either the sintering temperature or the amount of CuO lead to considerable variation in the microwave dielectric properties. The τf was modified to ∼0 ppm/°C, as a result of the variation in phase constitutions as a function of composition.