New method for fabrication of lead-free BaTiO3 piezoelectric ceramics

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI:10.1109/SPAWDA.2008.4775862

K. Zhu, Likui Su, H. Ji, J. Qiu

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Abstract

BaTiO3 (BT) powders were synthesized by hydrothermal method for fabricating lead-free barium titanate piezoelectric ceramics. The effect of the two washing methods (distilled water and acetic acid solutions) on the piezoelectric properties of the BT ceramics was studied. BT ceramics with the higher piezoelectric properties (d33 value is over 190 pC/N) was obtained from the powders washed by acetic acid solution. The BaTiO3 ceramics from three types (BT01, BT03 and BT05) of hydrothermally synthesized BaTiO3 powders were sintered using traditional sintering method and microwave sintering method separately. Their piezoelectric properties were investigated and compared. The results indicate that only the specimens sintered by traditional sintering method from BT03 powders have better structure and higher piezoelectric properties (d33 value about 350 pC/N), all the specimens sintered by the microwave method exhibit high d33 value (over 350 pC/N). Our work shows that hydrothermal method and microwave sintering is very useful to enhance the piezoelectric properties of BT ceramics.

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制备无铅BaTiO3压电陶瓷的新方法

采用水热法制备无铅钛酸钡压电陶瓷用BaTiO3 (BT)粉末。研究了两种洗涤方法(蒸馏水和醋酸溶液)对BT陶瓷压电性能的影响。用醋酸溶液洗涤得到了具有较高压电性能的BT陶瓷(d33值大于190 pC/N)。采用传统烧结法和微波烧结法分别对水热合成的BaTiO3粉体(BT01、BT03和BT05)制备的BaTiO3陶瓷进行了烧结。对它们的压电性能进行了研究和比较。结果表明:BT03粉末只有传统烧结法制备的试样具有较好的结构和较高的压电性能(d33值约为350 pC/N)，微波法制备的试样均具有较高的d33值(大于350 pC/N)。研究表明，水热法和微波烧结是提高BT陶瓷压电性能的有效方法。

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2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications

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