인슐레이터용 알루미나의 치밀화에 미치는 MgO의 함량과 소결 온도의 영향
Effects of the Content of MgO Additive and Sintering Temperature on the Densification of Alumina Insulator
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The influence of MgO addition on the densification and microstructure of alumina (Al2O3) was studied. Compacted alumina specimens were manufactured using ball-milling and one-directional pressing followed by sintering at temperatures below 1700oC. Relative density, shrinkage, hardness, and microstructure were investigated using analytical tools such as FE-SEM, EDS, and XRD. When the MgO was added up to 5.0 wt% and sintered at 1500oC and 1600oC, the relative density exhibited an average value of 97% or more at both temperatures. The maximum density of 99.2% was with the addition of 0.5 wt% MgO at 1500oC. Meanwhile, the specimens showed significantly lower density values when sintered at 1400oC than at 1500oC and 1600oC owing to the relatively low sintering temperature. The hardness and shrinkage data also showed a similar trend in the change in density, implying that the addition of approximately 0.5 wt% MgO can promote the densification of Al2O3. Studying the microstructure confirmed the uniformity of the sintered alumina. These results can be used as basic compositional data for the development of MgOcontaining alumina as high-dielectric insulators.
Abstract
The influence of MgO addition on the densification and microstructure of alumina (Al2O3) was studied. Compacted alumina specimens were manufactured using ball-milling and one-directional pressing followed by sintering at temperatures below 1700oC. Relative density, shrinkage, hardness, and microstructure were investigated using analytical tools such as FE-SEM, EDS, and XRD. When the MgO was added up to 5.0 wt% and sintered at 1500oC and 1600oC, the relative density exhibited an average value of 97% or more at both temperatures. The maximum density of 99.2% was with the addition of 0.5 wt% MgO at 1500oC. Meanwhile, the specimens showed significantly lower density values when sintered at 1400oC than at 1500oC and 1600oC owing to the relatively low sintering temperature. The hardness and shrinkage data also showed a similar trend in the change in density, implying that the addition of approximately 0.5 wt% MgO can promote the densification of Al2O3. Studying the microstructure confirmed the uniformity of the sintered alumina. These results can be used as basic compositional data for the development of MgOcontaining alumina as high-dielectric insulators.
참고문헌 (19)
- Y. Meng, , Ceram Int, 40, pp.10677~ (2014)
- R. H. Piva, , Ceram Int, 39, pp.7323~ (2013)
- J. M. Amigó, , J. Eur. Ceram. Soc, 25, pp.1479~ (2005)
- M. Touzin, , J. Eur. Ceram. Soc, 30, pp.805~ (2010)
- N. A. Andreeva, , Refract. Ind. Ceram, 44, pp.277~ (2003)
- M. Sathiyakumar, , J. Mater. Process Technol, 133, pp.282~ (2003)
- 김경민, "MgO-CaO-Al2O3-SiO2 glass 첨가제 함량이 AlN의물성에 미치는 영향", 한국분말재료학회지, 25(6), pp.494~500 (2018), 한국분말재료학회[DOI]
- D. C. N. Fabris, , Mater. Sci. Eng. A, 781, pp.139237~ (2020)
- E. Medvedovski, , Ceram Int, 32, pp.369~ (2006)
- J. Forrester, , J. Aust. Ceram. Soc, 44, pp.47~ (2008)
- R. L. Coble, , Prog. Ceram. Sci, 3, pp.197~ (1963)
- P. J. Jorgensen, , J. Am. Ceram. Soc, 47, pp.332~ (1964)
- I. B. Cutler, , J. Am. Ceram. Soc, 40, pp.134~ (1957)
- 이정아, "MgO 및 TiO2가 첨가된 알루미나의 치밀화와 입성장 거동", 한국세라믹학회지, 39(11) (2002), 한국세라믹학회
- S. J. Bennison, , J. Am. Ceram. Soc, 68, pp.22~ (1985)
- W. J. Smothers, , J. Am. Ceram. Soc, 37, pp.588~ (1954)
- H. P. Cahoon, , J. Am. Ceram. Soc, 39, pp.337~ (1956)
- M. P. Harmer, , J. Mater. Sci, 15, pp.3017~ (1980)
- A. Krell, , Int. J. Appl. Cerm. Technol, 8, pp.1108~ (2011)