The Effects of Tin in Bottom Surface to Ion Exchange of Float Glasses

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J. Korean Ceram. Soc. > Volume 27(6); 1990 > Article

Journal of the Korean Ceramic Society 1990;27(6): 763.

Float 판유리에 있어서 바닥면의 Tin성분이 이온교환에 미치는 영향

이동인, 이용근, 이희수

연세대학교 요업공학과

The Effects of Tin in Bottom Surface to Ion Exchange of Float Glasses

ABSTRACT

The gradient and depth of tin at the side of glasses by float process were measured. The effects of tin to ion exchanged of glasses in the molten salt of KNO3 and AgNO3 were presented by means of Ag+ ion penetration depth, diffusion coefficient variation, spectral transmittance and color coordinates. The diffusion coefficient of Ag+ ion of tin side was higher than air side, and the activation energy of tin side was 0.2-0.6Kcal/mole lower than air side. Therefore Ag+ ion penetration depth of tin side is 2-10$mutextrm{m}$ deeper, hence it can be seen that tin promote Ag+ ion diffusion. The same treatment of ion exchange, reddish-brown oflong wavelength in case of tin present, yellowish-amber of short wavelength in case of tin absence were revealed.