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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Processing of Piezoelectric (Li,Na,K)NbO_3 Porous Ceramics and (Li,Na,K)NbO_3/KNbO_3 Composites
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Processing of Piezoelectric (Li,Na,K)NbO_3 Porous Ceramics and (Li,Na,K)NbO_3/KNbO_3 Composites

机译：压电（Li，Na，K）NbO_3多孔陶瓷和（Li，Na，K）NbO_3 / KNbO_3复合材料的加工

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摘要

Porous Li_(0.06)(Na_(0.5)K_(0.5))_(0.94)NbO_3 (LNKN-6) ceramics with different pore volumes have been prepared using preceramic powder and phenol resin fiber (Kynol~(™)) as a pore former. It was confirmed that the porous ceramics synthesized by the "two-stage firing method" suppressed the loss of alkali elements from the porous body during heat treatment. The porous LNKN-6 ceramics were then converted to LNKN-6/KNbO_3 composites through soaking and heat treatment using a sol-gel precursor source composed of KNbO_3 to form 3-3-type composites. The microstructure, dielectric, and piezoelectric properties of the porous LNKN-6 ceramics and LNKN-6/KNbO_3 composites were characterized and compared. The LNKN-6/KNbO_3 composites had a hollow structure whose pores in the region near the surface were filled and coated with KNbO_3 precipitates; however, a large amount of residual air was trapped in the pores inside the composites. As a result, the LNKN-6/KNbO_3 composites fabricated using 30 vol% Kynol~(™) showed an enhanced piezoelectric voltage output coefficient (g_(33)) of 63.0 × 10~(-3) V-m/N, compared with monolithic LNKN-6 ceramics having a g33 of 30.2 × 10~(-3) V-m/N.
机译：以陶瓷粉末和酚醛树脂纤维（Kynol〜（TM））为孔，制备了具有不同孔容的多孔Li_（0.06）（Na_（0.5）K_（0.5））_（0.94）NbO_3（LNKN-6）陶瓷前任的。可以确认，通过“两阶段烧成法”合成的多孔质陶瓷抑制了热处理时多孔质体中的碱元素的损失。然后通过使用由KNbO_3组成的溶胶-凝胶前体源通过浸泡和热处理将多孔LNKN-6陶瓷转变为LNKN-6 / KNbO_3复合材料，从而形成3-3-型复合材料。表征并比较了多孔LNKN-6陶瓷和LNKN-6 / KNbO_3复合材料的微观结构，介电性能和压电性能。 LNKN-6 / KNbO_3复合材料具有中空结构，其表面附近区域的孔被填充并覆盖有KNbO_3沉淀物。但是，大量的残留空气被捕获在复合材料内部的孔中。结果，与整体式相比，使用30％体积的Kynol〜（™）制成的LNKN-6 / KNbO_3复合材料显示出63.0×10〜（-3）Vm / N的增强的压电电压输出系数（g_（33））。 L33N-6陶瓷的g33为30.2×10〜（-3）Vm / N。

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