用二步合成法制备了（１－ｘ）Ｐｂ（Ｍｇ１／３Ｎｂ２／３）Ｏ３－ｘＰｂＴｉＯ３原料，并制成了纯钙钛矿结构压电陶瓷．研究了三方－四方相界附近组份（ｘ＝０．２５～０．４０）及工艺与性能的关系．结果表明，在ｘ＝０．３２～０．３５间材料具有较大的介电常数，压电常数，耦合系数以及较低的品质因数．材料以１２００℃附近保温１５０ｍｉｎ为佳．材料性能表明，有希望成为新型压电陶瓷．
(1 - x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) ceramics with x near morphotropicphase boundary (x=0.25~0.40) were prepared by Columbite technique. The influences of PT content and preparation process on dielectric, ferroelectric and piezoelectric properties were studied.The results show that ceramics with x between 0.32 and 0.35 possess higher dielectric constant,piezoelectric constant, coupling factor and lower mechanical figure of merite. The properties arecomparable to best soft PZT ceramics.
参考文献
| [1] | Shrout T R, et al. Ferroelectric Lett., 1990, 12: 63--65. [2] Kelly J, et al. J. Am. Cer. Soc., 1997, 80 (4): 957--964. [3] Choi S W, et al. Mater. Letter., 1989, 8 (6,7): 253--255. |
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