MnO_2掺杂对ZnO-B_2O_3-P_2O_5-R_nO_m玻璃性能的影响

Influence of MnO_2 doping on property of ZnO-B_2O_3-P_2O_5-R_nO_m glass

在ZnO-B2O3-P2O5-RnOm玻璃中掺杂摩尔分数0～5%的MnO2,分析了MnO2掺杂对该玻璃线膨胀系数αl、密度ρ、电阻率Rv的影响,通过DTA、红外、拉曼光谱和XRD分析了玻璃的结构。结果表明:x(MnO2)>3%时,随着x(MnO2)的增加,tg和αl的值增高,而Rv和ρ的值降低。x(MnO2)≤3%时,Mn主要作为玻璃网络的形成体存在,x(MnO2)>3%时,Mn主要作为玻璃网络修饰体存在。掺杂MnO2后BPO4晶相衍射峰强度增强,并随MnO2的增多而减弱,Zn2P2O7主晶相衍射峰强度随MnO2的增多而减弱。

ZnO-B203-P2Os-RnOm glasses containing different mol fractions of MnO2 （0-5%） were prepared. Influences of MnO2 doping on αl, density p, resistance rate Rv of the glasses were analyzed by DTA, infrared. Raman and XRD spectra. Results show that when x（MnO2）〉3%, the value of tg and αl increase with increasing x（MnO2）, however, the value of Rv and p decrease. When x（MnO2）≤3%, Mn is as one of network formations in the glass network, when x（MnO2）〉3%, Mn exists in the glass network as the modifier. The XRD results reveal that the strengths of BPO4 crystalline phase diffractive peaks in the glass increase first, then decrease with increasing x（MnO2）. The strengths of Zn2P2O7 major crystalline phase diffractive peaks decrease with increasing x（MnO2）.