Earticle

초록

영어

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 for 1hour. Biscuit fired cores were treated with tools to control the fitness and thickness. Finished cores were 2nd fired at 1,500 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.

목차

Abstract
 Ⅰ. 서론
 Ⅱ. 연구 방법
  1. 출발원료
  2. 석고 몰드의 제조
  3. 슬립제조
  4. 코어의 제조
  5. 소성
  6. SEM 관찰
 Ⅲ. 결과
  1. 코어의 성형
  2. 코어의 수축 제어
  3. 코어의 적합 및 소성
  4. 소성한 코어의 단면 SEM 관찰
 Ⅳ. 고찰
 Ⅴ. 결론
 REFERENCES

키워드

저자

• 조준호 [ Jun-Ho Jo | 진주보건대학 치기공과 ]
• 서정일 [ Jeong-Il Seo | 경상대학교 나노신소재공학부 ]
• 배원태 [ Won-Tae Bae | 경상대학교 나노신소재공학부 ] 교신저자

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한치과기공학회지 [THE JOURNAL OF KOREAN ACADEMY OF DENTAL TECHNOLOGY]

• 간기

  계간

• pISSN

  1229-3954

• eISSN

  2288-5218

• 수록기간

  1979~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 515 DDC 617