BCZT无铅压电陶瓷的水热法制备及其性能

发布时间：2018-05-02 20:32

  本文选题：水热反应法 + 锆钛酸钡钙　； 参考：《硅酸盐学报》2017年09期

【摘要】：通过水热反应法低温烧结制备Ba_(0.85)Ca_(0.15)Zr_(0.1)Ti_(0.9)O_3(BCZT)无铅压电陶瓷,研究了烧结温度和时间对BCZT陶瓷的晶体结构和电学性能的影响。与固相反应法相比,由于水热法制备的BCZT前驱体的高活性,可以低温烧结制备BCZT陶瓷,低温烧结制备的BCZT陶瓷呈现纯钙钛矿结构、较为均匀的小晶粒微观形貌(小于10μm)和更高的致密度。通过水热法制备的BCZT陶瓷呈现优良的电学性能,其介电响应特征接近正常铁电体、又呈现一定的频率色散现象。1 340℃烧结18 h制备的BCZT陶瓷的剩余极化强度最大,Pr=6.84μC/cm2。1 320℃烧结18 h制备的BCZT陶瓷压电性能最佳,d33达到最大值213 p C/N。
[Abstract]:Lead-free BCZT piezoelectric ceramics were prepared by hydrothermal sintering at low temperature. The effects of sintering temperature and time on the crystal structure and electrical properties of BCZT ceramics were studied. Compared with solid state reaction, BCZT ceramics can be sintered at low temperature because of the high activity of BCZT precursor prepared by hydrothermal method. The BCZT ceramics prepared by low temperature sintering have pure perovskite structure. The smaller grain morphology (less than 10 渭 m) and higher density were obtained. The BCZT ceramics prepared by hydrothermal method have excellent electrical properties and the dielectric response characteristics are close to those of normal ferroelectrics. The maximum residual polarization strength of BCZT ceramics sintered at 1.340 鈩，

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