中文摘要：

无铅的压电的陶艺 Lix (K0.46Na0.54 ) 1-xNb0.86Ta0.1Sb0.04O3 (与从 0 ～ 0.1 的 x ) 被常规稳固的州的 sintering 综合方法。为在 A 的 K 和 Na 的李的 cationic 替换的效果结构，阶段转变行为和电的性质上的 perovskite 格子的地点被调查。在斜方晶、四角形的阶段之间的 Morphotropic 阶段边界(MPB ) 在 0.06x0.08 的作文范围被发现。类似于 Pb (Zr， Ti ) O3，电介质和压电的性质在 morphotropic 阶段边界附近为作文被提高。Li0.06 (K0.46Na0.54 )0.94- Nb0.86Ta0.1Sb0.04O3 陶艺表演优秀电的性质，也就是说压电的经常的 d33=215 pC/N，平面机电的联合因素 kp=41% ，绝缘的常数，和绝缘的损失晒黑 =2.45% 。结果显示那 Lix (K0.46Na0.54 ) 1-x Nb0.86 Ta0.1Sb0.04O3 陶器是有希望的无铅的压电的材料。

英文摘要：

Lead-free piezoelectric ceramics Lix（K0.46Na0.54）1-xNb0.86Ta0.1Sb0.0403 （with x ranging from 0 to 0.1） were synthesized by conventional solid state sintering method. The effect of cationic substitution of Li for K and Na in the A sites of perovskite lattice on the structure, phase transition behavior and electrical properties were investigated. Morphotropic phase boundaries（MPB） between orthorhombic and tetragonal phase are found in the composition range of 0.06≤x≤0.08. Analogous to Pb（Zr, Ti）O3, the dielectric and piezoelectric properties are enhanced for the composition near the morphotropic phase boundary. The Li0.06（K0.46Na0.54）0.94- Nb0.86Ta0.1Sb0.04O3 ceramics show excellent electrical properties, that is, piezoelectric constant d33=215 pC/N, planar electromechanical coupling factor kp=41%, dielectric constant ε33^T /ε0=1 303, and dielectric loss tan δ=2.45%. The results indicate that Lix（K0.46Na0.54）1 -xNb0.86Ta0.1Sb0.0403 ceramic is a promising lead-free piezoelectric material.