中文摘要：

采用传统的固相反应法和普通的烧结工艺，分别制备了（Ko.48Nao．52）1-χ。（LiSb）χNb1-O3（χ=0．055，0．060，0．065）和χ=0．055，0=0．065按摩尔比1：1复合的无铅压电陶瓷样品（55-65），并对样品的压电、介电等性能进行了测试研究．实验结果表明：55-65不等同于χ=0．060的组分，其压电性能远低于χ=0．060的样品，进一步研究表明，相同烧结温度下，55-65样品的损耗较高，晶粒难以生长，相对较小，较小的晶粒可能在样品形变时产生的应力较大，这可能是55—65样品压电性能较低的原因．

英文摘要：

Lead-free Piezoelectric ceramics （K0.48Na0.52）l-χ（LiSb）xNbl-xO3 （x=0. 055,0. 060,0. 065）, the composition compounded with x=0.055, x=0. 065 in mol ratio 1：1 （55-65） are fabricated by con- ventional solid-state sintering method, and the dielectric and piezoelectric characteristics are investiga- ted. It is found that the piezoelectric properties of 55-65 is much lower than that of the sample with x= 0. 060. Further investigations show that the sample 55-65 has relatively high dielectric loss and small grains. The smaller grains may lead to stronger stress with the same strain and this may be the reason for the sample 55-65 exhibiting low piezoelectric activities.