Earticle

초록

영어

Purpose: Zirconia blocks for all ceramic dentures are divided into two groups. One is pre-heated block and the other is binder added block. In this study, the possibility of recycling the remained parts of binder added block after CAD/CAM machining with slip casting process was investigated. Methods: Owing to the binder added block contain large amount of organic matter, Binder burn-out was must be carried out before ball milling for preparing the casting slip. Binder burn-out was accomplished at 600 for 10 hours. Ball milling was performed with 5 zirconia ball and 60 polyethylene bottle. From 0% to 5% at 1% intervals of alumina was added to zirconia powder for preparing slip. Solid casting was achieved with plaster mold. Cast bodies were dried and sintered at 1,500 for 1 hour. Linear shrinkage, apparent porosity, water absorption, bulk density, and flexural strength were tested. Microstructures were observed by SEM, EDS and XRD analysis were executed. Results: Optimum slips for casting was prepared with 300g ball, 100g powder, and 180g distilled water. Cast body without alumina showed 26% of linear shrinkage, 6.07 of apparent density, and 470 of three point bend strength. On the other hand, as received zirconia block, which was sintered at the same conditions, showed 23% of linear shrinkage, 6.10 of apparent density, and 680 of three point bend strength. When 3% of alumina was added to zirconia, sintered body showed 23% of linear shrinkage, 6.10 of apparent density, and 780 of three point bend strength. SEM photomicrographs and EDS analysis showed alumina particles uniformly dispersed in zirconia matrix, and XRD analysis showed no phase transformation of tetragonal zirconia particles was occurred when alumina was added. Conclusion: According to the all of this experimental results, 3% of alumina added cast zirconia body showed excellent mechanical properties more than as received binder containing zirconia block

목차

[Abstract]
 Ⅰ. 서론
 Ⅱ. 연구 방법
  1. 출발원료
  2. 제조 공정
  3. 시험 항목
 Ⅲ. 결과
  1. 예비실험
  2. 알루미나 첨가에 따른 물성 변화
  3. 알루미나 첨가에 따른 SEM 관찰
  4. EDS 분석
  5. XRD 분석
 Ⅳ. 고찰
 Ⅴ. 결론
 참고문헌

키워드

저자

• 이동윤 [ Dong Yoon Lee | 진주보건대학 치기공과 ]
• 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