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目的改进(Ba0.87Sr0.04Ca0.09)(Ti0.94-xZrxSn0.06)O3基(BSCTZS)纳米粉体及其陶瓷的制备方法,研究Zr含量对BSCTZS粉体及陶瓷相组成、微观结构及其介电性能的影响,得到细晶高介电常数Y5V陶瓷材料。方法采用溶胶-凝胶法制备了一系列BSCTZS基(0.04≤x≤0.12)纳米粉体及其陶瓷,通过TG-DTG,XRD,TEM和SEM对样品进行表征,并测试陶瓷的介电性能。结果 BSCTZS粉体为立方相钛酸钡,其平均粒径小于100nm。随着Zr含量的增大,陶瓷的居里峰移向低温,介温谱ε-T趋于平缓,容温变化率得到改善,当Zr摩尔分数为8%时,陶瓷的室温介电常数达13200以上,并满足EIAY5V标准。结论溶胶-凝胶法工艺简单、均匀性好、纯度高、配方容易控制、粉体烧结活性较好,采用该方法可以得到满足Y5V标准的BSCTZS基陶瓷材料。
Aim To improve the preparation method of (Ba0.87Sr0.04Ca0.09) (Ti0.94-xZrxSn0.06) O3-based (BSCTZS) nanopowders and their ceramics, and to study the effects of Zr content on the composition, microstructure and microstructure of BSCTZS powders and ceramics The dielectric properties of fine grain high dielectric constant Y5V ceramic material. Methods A series of BSCTZS-based (0.04≤x≤0.12) nano-powders and their ceramics were prepared by sol-gel method. The samples were characterized by TG-DTG, XRD, TEM and SEM, and their dielectric properties were tested. Results BSCTZS powder was cubic phase barium titanate with an average particle size of less than 100 nm. With the increase of Zr content, the Curie temperature of the ceramic is shifted to low temperature, the temperature profile ε-T tends to be gentle and the rate of change of the temperature is improved. When the Zr mole fraction is 8%, the dielectric constant of the ceramic reaches 13200 or more, and meet the EIAY5V standard. Conclusion The sol-gel method has the advantages of simple process, good uniformity, high purity, easy control of the recipe and good sintering activity. BSCTZS-based ceramic materials meeting the Y5V standard can be obtained by this method.