Barium titanate piezoelectric ceramics manufactured by two-step sintering
Barium titanate piezoelectric ceramics manufactured by two-step sintering
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DOI：
10.1143/jjap.46.7035
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发表时间：
2007-10-01
期刊：
影响因子：
--
通讯作者：
Adachi, Masatoshi
中科院分区：
文献类型：
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作者：
Karaki, Tomoaki;Yan, Kang;Adachi, Masatoshi
以水热合成的100 nm颗粒为原料，采用两步烧结法制备了细晶钛酸钡(BaTiO3)压电陶瓷。扫描电子显微镜(SEM)显示样品中有一个小而不规则的磁畴结构。烧结条件依赖于密度、介电常数、。并对其压电性进行了研究。在最佳工艺条件下，致密样品的平均晶粒尺寸约为1.6微米，且具有较大的介电常数和良好的压电性能。用d(33)仪测量了d(33)=460pC/N的大压电常数。居里相和正交相到四方相的转变温度分别为126℃和24℃。这些结果表明，用低成本工艺制造的非铅基BaTiO_3陶瓷有可能应用于室温下工作的超声波发生器、致动器、压电振荡器和传感器。
Two-step sintering was applied to manufacture fine-grain barium titanate (BaTiO3) piezoelectric ceramics from hydrothermally synthesized 100 nm particles. Scanning electron microscopy (SEM) revealed a small and irregular domain structure in the samples. The sintering condition dependences of density, dielectric constants,. and piezoelectric properties were investigated. Under the optimal conditions, dense specimens had an average grain size of approximately 1.6 mu m, and showed large dielectric constants and excellent piezoelectric properties. The large piezoelectric constant of d(33) = 460pC/N was measured using a d(33) meter. The Curie-and orthorhombic-to-tetragonal phase transition temperatures were 126 and 24 degrees C, respectively. These results indicated the possibility of applying non-lead-based BaTiO3 ceramics manufactured by a low-cost process to ultrasonic generators, actuators, piezoelectric vibrators, and sensors working at room temperature.