Effect of Kovar alloy oxidized in simulated N2/H2O atmosphere on its sealing with glass

Dawei Luo, Wenbo Leng, Zhuoshen Shen

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    Dawei Luo, Wenbo Leng, and Zhuoshen Shen, Effect of Kovar alloy oxidized in simulated N2/H2O atmosphere on its sealing with glass, J. Univ. Sci. Technol. Beijing , 15(2008), No. 3, pp.267-271. https://dx.doi.org/10.1016/S1005-8850(08)60050-X
    Dawei Luo, Wenbo Leng, and Zhuoshen Shen, Effect of Kovar alloy oxidized in simulated N2/H2O atmosphere on its sealing with glass, J. Univ. Sci. Technol. Beijing , 15(2008), No. 3, pp.267-271. https://dx.doi.org/10.1016/S1005-8850(08)60050-X
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    Effect of Kovar alloy oxidized in simulated N2/H2O atmosphere on its sealing with glass

    • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

      通信作者:

      Dawei Luo E-mail: luodave@163.com

    中文摘要

    The effect of Kovar alloy oxidized in simulated field atmosphere on its sealing with glass was studied in this article. After Kovar plates and pins were preoxidized in N2 with 0℃, 10℃ and 20℃ dew points at 1000℃ for different times, Fe304 and Fe203 existed in the oxidation products on Kovar surface, and the quantity of Fe203 increased with increasing dew point and oxidation time. Then they were sealed with borosilicate glass insulator at 1030℃ for 20 rain. The results indicated that the type and quantity of oxidation products would directly influence the quality of glass-to-metal seals. With the increase of oxidation products, gas bubbles in the glass insulator were more serious, the climbing height of glass along the pins was higher, and corrosion of Kovar pins caused from the molten glass was transformed from uniform to the localized.

     

    Materials

    Effect of Kovar alloy oxidized in simulated N2/H2O atmosphere on its sealing with glass

    Author Affilications

      • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

    • Received: 20 May 2007;
    The effect of Kovar alloy oxidized in simulated field atmosphere on its sealing with glass was studied in this article. After Kovar plates and pins were preoxidized in N2 with 0℃, 10℃ and 20℃ dew points at 1000℃ for different times, Fe304 and Fe203 existed in the oxidation products on Kovar surface, and the quantity of Fe203 increased with increasing dew point and oxidation time. Then they were sealed with borosilicate glass insulator at 1030℃ for 20 rain. The results indicated that the type and quantity of oxidation products would directly influence the quality of glass-to-metal seals. With the increase of oxidation products, gas bubbles in the glass insulator were more serious, the climbing height of glass along the pins was higher, and corrosion of Kovar pins caused from the molten glass was transformed from uniform to the localized.

     

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