当某些各向异性的晶体材料承受外部的机械力作用时,其相应的表面会出现电荷,这一现象称为压电效应。反之当这种晶体置于电场下时,晶体会出现几何变形,这被称为逆压电效应。具有压电效应的材料称为压电材料。钛酸钡陶瓷的发现促进了压电材料的发展,它不但使压电材料从压电单晶发 When some anisotropic crystal material under external mechanical force, the corresponding surface will appear charge, a phenomenon called piezoelectric effect. Conversely when this crystal is placed in the electric field, the crystal will appear geometric deformation, which is called the inverse piezoelectric effect. Materials that have piezoelectric effects are called piezoelectric materials. The discovery of barium titanate ceramics has promoted the development of piezoelectric materials, which not only make the piezoelectric material from the piezoelectric single crystal