Sensitive materials mainly composed of ZnO and their multi-functional prope
rties were investigated. The temperature extent of linear resistance, non-l
inear deviation and endurance ability of surge energy were further discusse
d. The effect of Mg2+, Al3+ and Si4+: which could be solid solutioned in Zn
O grain and the function of Y3+ ion segregated out in grain boundary were s
tudied as well. The function of Ti was analyzed emphatically.