지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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Purpose: Waste parts of zirconia blocks and powders were remained after CAD/CAM process. In order to make these residual zirconia fit for practical use, zirconia single cores were produced by drain casting process. Methods: Remained zirconia blocks were reduced to powders with zirconia mortar, and screened with 180 mesh sieve. Zirconia slip was prepared from waste parts of zirconia by ball milling. Plaster molds for forming cores by slip casting were also prepared. Formed cores were removed from mold after partial drying. Dried cores were biscuit fired at $1,100^{\circ}C$ for 1hour. Biscuit fired cores were treated with tools to control the fitness and thickness. Finished cores were $2^{nd}$ fired at $1,500^{\circ}C$ for 1hour. Microstructure of cross section of core was observed by SEM. Results: When mill pot was filled with 100g of zirconia and alumina mixed powder, 300g of zirconia ball, and 180g of distilled water, the optimum slip for drain casting was obtained. Gypsum plaster for ceramic forming was more suitable then yellow stone plaster for casting process. SEM photograph showed the microstructure of fully dense with uniform grain size of zirconia and well dispersed alumina grains into the zirconia matrix. Conclusion: Zirconia single cores were produced by drain casting process. Drain casting is useful process to make these residual zirconia fit for practical use. Further study will be focused on the preparation of the bridge type cores by casting.
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참고문헌 (16)
참고문헌 신청
Becher / 1987 / Advanced Structural Ceramics / Advanced Structural Ceramics 123
Boening KW / 2000 / Clinical fit of procera Allceram crowns / J Prosthet Dent 84:419~424
D. Jiles / 1994 / Introduction to the Electronic Properties of Material / Chapman & Hall :3~7
이동윤 / 2012 / 주입성형한 지르코니아 소결체의 기계적 성질에 미치는 알루미나 첨가의 영향 / 대한치과기공학회지 34(2):113~119
D.s Adock / 1957 / The Mechanism of Filter Pressing and Slip Casting
Boening KW / 2000 / Clinical fit of procera Allceram crowns / J Prosthet Dent 84:419~424
D. Jiles / 1994 / Introduction to the Electronic Properties of Material / Chapman & Hall :3~7
이동윤 / 2012 / 주입성형한 지르코니아 소결체의 기계적 성질에 미치는 알루미나 첨가의 영향 / 대한치과기공학회지 34(2):113~119
D.s Adock / 1957 / The Mechanism of Filter Pressing and Slip Casting
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