| 발전소의 석탄재로부터 결정화유리의 제초 및 물리적 특성 |
| 김형순, 김재명, 김석원1, 허증수1 |
순천대학교 재료·금속공학과
1경북대학교 금속공학과 |
| Development and Physical Properties of a Glass-ceramic from Fly Ash of Power Station |
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| ABSTRACT |
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Coal fly ash, produced from a power plant in Korea was used for the production of glass-ceramics and the physical properties of glass-ceramics were evaluated. CaO and TiO$_2$ were added into the fly ash during the melting process to reduce the viscosity of molten glass and to induce internal crystallization of glass, respectively. Glass-ceramic was produced through a single stage heat treatment (at 950∼1050$^{C}$ for 37∼240 min) after preparing glass (iota fly ash powder. As a result, a new tiny rod type crystals (a=7.4480, b=10.7381, c=4.3940 A, $alpha$=94.9, $beta$=98.6, γ=108.5°) was found in the glass-ceramics, which showed attractive mechanical properties, high hardness (7.1∼7.6 GPa) and wear resistance (by erosion test). Thus a glass-ceramic produced from thermal power plant fly ash and cell as a source for CaO exhibits a suitable treatment for the recycling and exploitation of waste materials and would be acceptable for a new application far building materials. |
| Key words:
Fly ash, Glass-ceramic, Hardness, Crystallisation, Wear resistance |
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