(K, Na) NbO3 based piezoceramics prepared by a two-step calcining and ball milling route
(K, Na) NbO3 based piezoceramics prepared by a two-step calcining and ball milling route
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DOI：
10.1016/j.matlet.2014.03.027
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发表时间：
2014-05
影响因子：
3
通讯作者：
Renlong Gao;Xiangcheng Chu;Y. Huan;Xiao-hui Wang;Long-tu Li
中科院分区：
文献类型：
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作者：
Renlong Gao;Xiangcheng Chu;Y. Huan;Xiao-hui Wang;Long-tu Li
在传统固相法的基础上，采用两步煅烧成球法制备了Li，Sb，Ta共掺杂（K，Na）NbO 3（KNN）陶瓷粉体。在两步法中，在常规工艺中增加了煅烧和球磨的进一步步骤。对每步反应的粉体进行了表征，并与传统的一步法制备的块体陶瓷进行了比较。两步反应可得到细小均匀的粉末，促进固相反应。通过两步工艺制备的块体陶瓷的压电常数从252 pC/N提高到292 pC/N，介电常数从1873提高到2060。结果表明，采用两步煅烧成球法制备KNN基压电陶瓷粉体是一种有效的方法，特别是在未来的大规模生产情况下。
A novel two-step calcining and balling route based on conventional solid state process was introduced to prepare the powder of Li, Sb, Ta co-doped (K, Na) NbO3(KNN) ceramics. In the two-step route, a further step of calcining and ball milling was added to the conventional process. Powders in each step were characterized and the bulk ceramics were prepared to compare with the conventional one-step route. Fine and homogeneous powders were obtained and the solid state reaction was promoted after the two-step route. The electrical properties of the bulk ceramics were enhanced by the two-step route with piezoelectric constantd33of about 292 pC/N form 252 pC/N, dielectric constant of 2060 from 1873. The results show that the two-step calcining and balling route is an effective way for powder preparation of KNN-based piezoceramics, especially in the future mass production case.