氧化锆对微通道板用铅硅玻璃结构和性能的影响

Effect of ZrO2 on Structure and Properties of Lead Silicon Glass for Microchannel Plate

通过X射线衍射(XRD)分析、拉曼光谱(Raman)分析、热膨胀系数以及维氏硬度等测试,探究了ZrO2对微通道板铅硅玻璃的结构和性能等方面的影响。研究表明,引入8%(质量分数,下同)以内的ZrO 2可实现无析晶微通道板用铅硅玻璃的制备。玻璃中桥氧键的振动强度随ZrO2含量的增加出现先增加后降低的变化趋势,对应热膨胀系数呈先降低后增加的变化趋势。ZrO2含量为2%时,玻璃中桥氧含量达到最大,对应玻璃的热膨胀系数最小为80.5×10^-7℃^-1,此时微通道板耐离子轰击能力比无锆微通道板提高了33%。玻璃的维氏硬度随ZrO2含量的增加逐渐变大,且ZrO2含量低于5%时,维氏硬度变化较为明显。ZrO2含量为8%时,玻璃的维氏硬度最大为5.1 GPa。

The effects of ZrO2 on the structure and performance of the microchannel plate lead silicon glass were investigated by X-ray diffraction(XRD),Raman spectroscopy(Raman),thermal expansion coefficient and Vickers hardness.The results show that the lead silicon glass for nondevitrification microchannel plate is prepared by adding ZrO2 within 8%(mass fraction,the same below).With the increase of ZrO2 content,the vibration intensity of bridging oxygen bonds in glass increases first and then decreases,and the corresponding thermal expansion coefficient decreases first and then increases.When the content of ZrO2 is 2%,the content of bridge oxygen in the glass reaches the maximum,and the thermal expansion coefficient of the corresponding glass is 80.5×10^-7℃^-1.At this time,the ion bombardment resistance of the microchannel plate is 33%higher than that of the normal microchannel plate.Vickers hardness of glass increases with the increase of ZrO2 content.When the content of ZrO2 is lower than 5%,the change of Vickers hardness is more obvious.When the content of ZrO2 is 8%,the maximum Vickers hardness of glass is 5.1 GPa.