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本文叙述了普通高压钠灯用玻璃焊料,在800℃温度下钠汞蒸气中的抗钠腐蚀性能。给出了Al_2O_3-CaO-BaO-MgO—Y_2O_3系在120h后钠腐蚀渗透层厚度为25～35μm;1000h后为80～90μm。按照d=At~(1/2)公式推算该玻璃焊料经10000h后钠腐蚀渗透层的厚度也仅约为300μm左右。
This article describes the common high-pressure sodium lamp glass solder, sodium vapor at 800 ℃ sodium corrosion resistance of sodium vapor. The results show that the thickness of sodium penetration layer in Al_2O_3-CaO-BaO-MgO-Y_2O_3 system is 25 ~ 35μm after 120h and 80 ~ 90μm after 1000h. According to the formula of d = At ~ (1/2), the thickness of sodium penetration layer of the glass solder after 10000h is only about 300μm.