Among the size effect researches particular concern is the ferroelectricity critical size, because when the grain size reduces to the critical size, the ferroelectricity will disappear.

• 尺寸效应研究中有关钛酸钡陶瓷保持铁电性临界尺寸的内容尤其受到关注, 因为当晶粒尺寸减小到临界尺寸时，铁电性将消失。