The aging properties of lead metaniobate piezoelectric ceramics have been investigated . the result indicated that the additives accumulate in grain boundary caused the material having good aging properties 对偏铌酸铅压电陶瓷的老化性能作了一些探讨，实验表明，掺杂改性后的偏铌酸铅显微结构发生了变化，晶界处有杂质分凝使得该材料老化性能好。
