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首页> 外文期刊>Key Engineering Materials >Preparation and Characterization of Citrate Sol-gel Derived CaLa_4Ti_4O_(15) Microwave Dielectric Ceramics
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Preparation and Characterization of Citrate Sol-gel Derived CaLa_4Ti_4O_(15) Microwave Dielectric Ceramics

机译：柠檬酸盐溶胶-凝胶CaLa_4Ti_4O_（15）微波介电陶瓷的制备与表征

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摘要

In this work hexagonal perovskite powders of CaLa_4Ti_4O_(15) were prepared by citrate sol-gel method. The calcined temperature was 1150℃, which is lower than that of the conventional solid method. Dense CLT ceramics were produced at sintering temperature of 1600℃. The crystal structures and microstructures were investigated by XRD, TEM and SEM, respectively. Compared with samples produced by solid method, the sol-gel derived CLT ceramics exhibited a near zero temperature coefficient of resonant frequency (τ_f) of-6 ppm/℃, and other microwave properties , ε_r～ 43, Q × f ～ 42000 GHz were also obtained. Moreover, the sintering temperature of the CLT ceramics could be reduced to 1400℃ by addition of B_2O_3-ZnO.
机译：在这项工作中，通过柠檬酸溶胶-凝胶法制备了CaLa_4Ti_4O_（15）的六方钙钛矿粉末。煅烧温度为1150℃，低于常规固相法。在1600℃的烧结温度下生产致密的CLT陶瓷。分别通过XRD，TEM和SEM研究了晶体结构和微观结构。与固态法制备的样品相比，溶胶-凝胶衍生的CLT陶瓷的谐振频率（τ_f）接近零温度系数为-6 ppm /℃，其他微波特性ε_r〜43，Q×f〜42000 GHz也获得了。另外，通过添加B_2O_3-ZnO可以将CLT陶瓷的烧结温度降至1400℃。

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