| 국내산 납석을 이용한 저팽창성 Machinable Ceramics의 제조 |
| 김재국, 양삼열, 정창주 |
| 전남대학교 공과대학 무기재료공학과 |
| Fabrication of Low TEC Machinable Ceramics using Domestic Pyrophillite |
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| ABSTRACT |
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Machinable ceramics containing ${beta}$-spodumene crystal was fabricated by melting method using domestic pyrophyllite. Raw materials were batched by molar ratio of 8:2, 7:3, 6:4, and 5:5 for fluorophlogopite and ${beta}$-spodumene. These compounds were melted at 1450$^{circ}C$ for 1 hr and formed in graphite mold. Base glasses were heat-treated according to 2-step schedule which was determined from DTA, XRD analysis and SEM observation. Fabricated machinable ceramics have excellent themal, chemical properties and machinability. |
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