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Journal of the Korean Ceramic Society 1996;33(8): 855. |
| Ge-Se-Te계 Chalcogenide 유리의 결정화 및 결정화가 물성에 미치는 영향 |
| 송순모, 최세영, 이용근 |
| 연세대학교 세라믹공학과 |
| Controlled Crystallization and its Effects on Some Properties of Ge-Se-Te Chalcogenide Glass |
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| ABSTRACT |
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The nucleation and the crystal growth rates of Ge-Se-Te chalcogenide glass by two step heat-treatment and its effect on the mechanical optical properties and water-resistance were determined. The maximum nuclea-tion and crystal growth rate were 2.1$times$103/mm3 .min at 28$0^{circ}C$ and 0.4${mu}{textrm}{m}$/min at 33$0^{circ}C$ respectively. When the crystal volume fraction with crystal size $1.5mutextrm{m}$ was about 4% the (hardness and fracture toughness were about 117kg/mm2 and 6.0 MPa.mm1/2)respectively. The weight loss of crystallized glass in water was lower than parent glass($25^{circ}C$ for 32 hrs : 0.03% 8$0^{circ}C$ for 16 hrs : 0.1%) as 0.01% at $25^{circ}C$, 0.03% at 8$0^{circ}C$ for 16 hrs : 0.1%) at $25^{circ}C$ 0.03% at 8$0^{circ}C$ respectively. The IR-transmittance decreased with increasing crystal size and crystal volume fraction. The IR-transmittance of crystallized glass with the crystal size of $1.5mutextrm{m}$ (crystal volume fraction : 4%) presented 56% which was about 4% lower than that of parent glass. |
| Key words:
Chalcogenide glass, Controlled crystallization, IR-transmittance, Microhardness, Fracture toughness, Wa-ter-resistance |
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