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水基凝胶注模成型PZT压电陶瓷的形变控制
作者:郭怀兵1 2 蔡锴3 陈拥军1 郭栋2 
单位:1. 广西大学化学化工学院 南宁 530004 2. 中国科学院声学研究所 北京 100190 3. 北京市理化分析测试中心 北京 100089 
关键词:凝胶注模 锆钛酸铅 变形率 
分类号:TM282
出版年,卷(期):页码:2013,41(6):745-750
DOI:
摘要:

采用凝胶注模成型工艺,在控制温度和湿度条件下制备出锆钛酸铅(PZT)压电陶瓷。研究了凝胶体系化学成分对陶瓷大圆片形变的影响规律,并将其微观结构与干压成型工艺制备的陶瓷进行对比。结果表明,固定单体与交联剂比例,随单体浓度增加,凝胶时间不断减小,素坯变形率先减小后增大,单体浓度为210 g/L时,素坯变形率最小。在此单体浓度下,随单体与交联剂比例增大,凝胶时间不断减小,但素坯变形率变化不规律。固定单体与交联剂比例,引发剂用量较少时,素坯无法成型,而引发剂用量较大则导致素坯更大变形。这些复杂的形变变化均与凝胶网络结构形成的聚合及交联反应有关。在最佳单体浓度、单体与交联剂比例及引发剂用量条件下,通过高温低湿的干燥工艺,制备出直径约为180 mm的无翘曲大面积PZT陶瓷。与干压成型工艺制备的PZT陶瓷相比,采用凝胶注模成型工艺制备的PZT陶瓷具有类似的微观结构及电学性能。通过工艺优化可将凝胶注模工艺用于制备无变形大面积压电陶瓷材料,以及特种换能器等声学器件。

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The thin large lead zirconate titanate (PZT) ceramic plates were prepared by a gelcasting process at controlled temperature and humidity. Effects of parameters (i.e., the monomer concentration, the monomer/cross-linker ratio, initiator content) on the warpage rage and gelation time were investigated. The gelcast PZT green bodies show a minimum warpage rate at an optimum fixed acrylamide (AM) concentration of about 210 g/L and a fixed AM/methylenebisacrylamide (AM/MBAM) ratio. The warpage rate exhibits a complicated dependence on AM/MBAM ratio at the optimum monomer concentration. It is difficult to form a strong gelcast green body at a rather low initiator concentration, while the green body with the excessive amount of initiator has a great warpage rate. The variation of warpage rate was analyzed in terms of the three dimensional macromolecular gel network structure formed under different conditions. The large flat PZT plate samples with a diameter of 180 mm were gelcast under the optimum conditions at controlled temperature and humidity. In addition, the gelcast PZT ceramics showed similar microstructure and electric performance as that of the dry pressed one, indicating that the ceramics are promising for transducer applications.

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基金项目:
国家“973”计划(2013CB632900);国家自然科学基金(11074277) 资助项目。
作者简介:
第一作者:郭怀兵(1987—),男,硕士研究生。 通信作者:郭 栋(1974—),男,研究员。
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参考文献:
[1] Omatte O O, Janny M A, Strehiow R A. Gelcasting–a new ceramic forming process [J]. Am Ceram Soc Bull, 1991, 70(10): 1641–1649.
[2] Young A C, Omatete O O, Janney M A, et al. Gelcasting of alumina [J]. J Am Ceram Soc, 1991, 74(03): 612–618.
[3] 杨金龙, 谢志鹏, 汤强, 等. α-Al2O3悬浮体的流变性及凝胶注模成型工艺的研究[J]. 硅酸盐学报, 1998, 26(1): 41–46.
Yang Jinlong, XiE Zhipeng, Tang Qiang, et al. J Chin Ceram Soc, 1998, 26(1): 41–46.
[4] Dai Jianqing, Xie Zhipeng, Huang Yong. The contributing factor and elimination of macropores in Si3N4 green bodies formed by water-based gelcasting [J]. J Mater Sci Lett, 1999, 18(21): 1739–1742.
[5] Vlajic M D, Krstic V D. Strength and machining of gelcast SiC ceramics [J]. J Mater Sci, 2002, 37: 2943–2947.
[6] Guo Dong, Cai Kai. Application of gelcasting to the fabrication of piezoelectric ceramic parts [J]. J Eur Ceram Soc, 2003, 23: 1131–1137.
[7] 金晓, 余娟丽, 杨金龙, 等. 凝胶注模固化应力的研究[J]. 硅酸盐学报, 2012, 40(9): 1271–1277.
Jin Xiao, Yu Juanli, Yang Jinlong, et al. J Chin Ceram Soc, 2012, 40(9): 1271–1277.
[8] Gilissen R, Erauw J P, Smolders A, et al. Gelcasting, a near net shape technique [J]. Mater Des, 2000, 21: 251–257.
[9] Yu Juanli, Wang Hongjie, Zeng Hong, et al. Effect of monomer content on physical properties of silicon nitride ceramic green body prepared by gelcasting [J]. Ceram Int, 2009, 35: 1039–1044.
[10] Adolfssonw E. Gelcasting of zirconia using agarose [J]. J Am Ceram Soc, 2006, 89: 1897–1902.
[11] Ghosal S, Emami N, Harn Y, et al. A physical model for the drying of gelcasting ceramics [J]. J Am Ceram Soc, 1999, 82(3): 513–520.
[12] Guo Dong, Cai Kai, Li Longtu, et al. Investigation of the additive induced doping effects in gelcast soft lead zirconate titanate ceramics [J]. J Appl Phys, 2009, 106: 054104(1–7).
[13] Zheng P, Zhang J L, Tan Y Q, et al. Grain-size effects on dielectric and piezoelectric properties of poled BaTiO3 ceramics [J]. Acta Mater, 2012, 60: 5022–5030.
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