Improvement in the sintering process of Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃ ceramics by the replacement of Zr by Hf

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• 作者：A. Di Loreto ; R. Machado ; A. Frattini…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：588-594
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

We investigate the effects of replacing Zr4+ ions by Hf4+ on the sintering and electrical properties of Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃ (BCZT) lead-free piezoceramics. For that purpose, Ba_0.85Ca_0.15Hf_0.1Ti_0.9O₃ ceramics were sintered at different temperatures and their properties were compared to those of BCZT fabricated under the same conditions. We show that Hf as B-site dopant facilitates the formation of the perovskite phase during the calcination process and improves the electrical properties of the ceramics due to the development of a denser microstructure with greater grain size and lower porosity.