封着유리의 製造에 關한 硏究 = Studies on Preparation of Solder Glass

다국어 초록 (Multilingual Abstract)

The purpose of these studies are to prepare low melting devitrifiable solder glass for high termal expansion seal and to find out solder glass which is the optimum condition in terms of thermal properties among others.
Then five kinds of frits were prepared by quenching after melting of solder glass in the Pt-crucible at 1,100℃, which contained 2wt% of ZrO₂ as a neucleation agent with being control led by the concentration of mother glass of PbO-ZnO-B₂O₃-SiO₂ system.
For probing the characteristics of the solder glass, DTA, X-ray powder diffraction, thermal, expansion, sealability, fluidity and activation energy were examined.
The results are as follows:
1. It was possible in sealing of low temperature that the sealability ＆ crystallization temperature was lowered and the fludity was good owing to an increase in PbO wt% but it was inadquate in sealing of color TV tube for 80.5wt% PbO and over because thermal expansion was increased.
2. The optimum holding time was 60 minutes.
3. In the sample contained 80.5wt% PbO, the thermal expansion coefficient was 101.8×10^-7/℃, the crystallization temperature was 443℃, flow button diameter was 27.7㎜, the sealability was 25.15㎏f/㎠, It is better than the existing solder glass.
4. The crystals proved in process of melting and crystallization were Pb_8Zn(Si₂O_7)₃, PbZrO, Zn₂SiO₁ etc.
5. The activation energy needed for crystallization was 87.13kJ/mol.