在还原气氛中熔制了SnCl2-MgO-P2O5系统无铅封接玻璃;用X射线衍射分析(Xrd)、差热分析(dTA)、红外光谱分析(fT-Ir)、热膨胀分析、粉末失重法等研究了玻璃形成区、玻璃结构、特征温度(转变温度Tg和软化温度Tf)、热膨胀系数、耐水侵蚀性等。结果表明,实验制得了一系列特征温度较低的玻璃样品,通过分析样品的dTA曲线,得到了一较低的Tg,其值为231℃;fT-Ir图分析结果证明了玻璃结构的存在,但Xrd图分析结果显示该玻璃易结晶。玻璃样品的Tf随SnCl2/(SnCl2+P2O5)的摩尔比值的增加而下降,随MgO含量的增加而升高。MgO能有效提高玻璃样品的耐水侵蚀性、降低玻璃的晶化能力,但玻璃样品的耐水侵蚀性还未能达到封接要求。Lead-free sealing glasses in the SnCl2-MgO-P2O5 system were prepared in reducing atmosphere.The glass-forming region, structure, characteristic temperature(transition temperature Tg and softening temperature Tf), coefficient of thermal expansion,as well as the water erosion of the glasses were investigated by XRD analysis, differential thermal analysis, Fourier transform infrared spectroscopic analysis, thermal expansion analysis, and grain mass loss method.The results show that a series of glass samples were prepared with a low characteristic temperature.The DTA curve shows a low Tg of a sample at 231℃.The FT-IR spectra indicate the glass structure of the sample, but the XRD pattern shows that the glass tends to crystallize.With the molar ratio of SnCl2 /(SnCl2 +P2O5) increases, the Tf of the glasses decreases, whereas the Tf increases with the increasing of the content of MgO.Meanwhile, with the addition of MgO, the crystallization ability and of the glasses decrease, and the water erosion resistance of the glasses is improved which still can not meet the minimum requirement for stealing.中国国家重点基础研究发展计划(编号:2012CB933103
