<正>Zn O-Bi_2O_3 varistorfilms doped with two kinds of rare earth element oxides(Lu_2O_3,Yb_2O_3)were prepared by the sol-gel method.The effects of Lu_2O_3/Yb__
<正>Along with the electronic products entering peo-ple’s life,the electromagnetic radiation is becom-ing a serious problem threatening human health.Consequent