Effect of MgO-CaO-Al2O3-SiO2 glass additive on densification of Al2O3 ceramics
2
조회
0
다운로드
6
인용
0
참고문헌
키워드
초록
We investigated the effect of the MgO-CaO-Al2O3-SiO2 (MCAS) additive on the densification of Al2O3 ceramics. MCAS wassynthesized using a polymeric-complex method. We analyzed the densification behavior, using dilatometric analysis up to1600 oC, and the results showed that sinterability increased with increasing MCAS content. Al2O3 samples were prepared byisothermal sintering at 1400, 1500, and 1600 oC. The microstructure, phase formation, and hardness of the samples wereanalyzed and discussed in relation to both the MCAS content and sintering temperature. The density of the MCAS-dopedsamples sintered at 1500 and 1600 oC was over 98%, and the maximum relative density was 99.7%. The highest hardness (18GPa) was achieved for the sample prepared with 3 wt.% MCAS and sintered at 1500 oC for 1 h because further dopingresulted in excessive grain growth. These results elucidate the conditions required for pressure-free sintering.
Abstract
We investigated the effect of the MgO-CaO-Al2O3-SiO2 (MCAS) additive on the densification of Al2O3 ceramics. MCAS wassynthesized using a polymeric-complex method. We analyzed the densification behavior, using dilatometric analysis up to1600 oC, and the results showed that sinterability increased with increasing MCAS content. Al2O3 samples were prepared byisothermal sintering at 1400, 1500, and 1600 oC. The microstructure, phase formation, and hardness of the samples wereanalyzed and discussed in relation to both the MCAS content and sintering temperature. The density of the MCAS-dopedsamples sintered at 1500 and 1600 oC was over 98%, and the maximum relative density was 99.7%. The highest hardness (18GPa) was achieved for the sample prepared with 3 wt.% MCAS and sintered at 1500 oC for 1 h because further dopingresulted in excessive grain growth. These results elucidate the conditions required for pressure-free sintering.
참고문헌 (28)
- M. P. Harmer, , J. Mater. Sci, 15, pp.3017~3024 (1980)
- M. P. Harmer, , J. Br. Ceram. Soc, 5, pp.147~148 (1981)
- C. Nivot, , Ceram. Int, 34, pp.1595~1602 (2008)
- K. Liu, , Int. J. Adv. Manuf. Technol, 67, pp.2511~2519 (2013)
- G. Maizza, , J. Asian Ceram. Soc, 2, pp.215~222 (2014)
- P. Guyot, , Scr. Mater, 84-85, pp.35~38 (2014)
- Alireza Moradkhani, "Effect of Sintering Temperature on the Grain Size and Mechanical Properties of Al2O3-SiC Nanocomposites", 한국세라믹학회지, 56(3), pp.256~268 (2019), 한국세라믹학회[DOI]
- Jieguang Song, "Sintering densification and properties of Al2O3", Al cermet materials via powder metallurgy method, 2018, pp.19(2), 142~145[DOI]
- K. Shigeno, , Ferroelectrics, 356, pp.189~196 (2007)
- H. Unno, , J. Electron Microsc, 59, pp.107~115 (2010)
- 변태훈, "Thermal Expansion and Dielectric Properties of CaO-ZnO-B2O3-SiO2 Glass-Added Al2O3 Composites for LTCC Applications", 한국세라믹학회지, 47(4), pp.325~328 (2010), 한국세라믹학회
- I. J. Induja, , Ceram. Int, 41, pp.13572~13581 (2015)
- X. Luo, , Ceram. Int, 44, pp.6354~6361 (2018)
- 조범래, "Effect of composition change on sintering and metallizing of alumina ceramics", Journal of Ceramic Processing Research, 10(1), pp.121~123 (2009), 청정에너지연구소[DOI]
- W. R. Rao, , J. Am. Ceram. Soc, 56, pp.588~593 (1973)
- J. Zhao, , J. Am. Ceram. Soc, 70, pp.860~866 (1987)
- Z. Harun, , Adv. Mat. Res, 488-489, pp.335~339 (2012)
- S. Lei, , J. Alloys. Compd, 632, pp.78~86 (2015)
- C. M. Cheng, , J. Eur. Ceram. Soc, 20, pp.1061~1067 (2000)
- H. J. Lee, , Int. J. Refract. Met. Hard Mater, 53, pp.46~50 (2015)
- 이화준, "Effect of Additive Size on the Densification and Thermal Conductivity of AlN Ceramics with MgO–CaO–Al2O3–SiO2 Additives", 한국세라믹학회지, 54(1), pp.43~48 (2017), 한국세라믹학회
- Omer Kaygili, "Dielectric and thermal properties of Na2O-CaO-SiO2- MgO-Al2O3-TiO2 glass-ceramic", Journal of Ceramic Processing Research, 17(8), pp.881~884 (2016), 청정에너지연구소[DOI]
- 이화준, "Synthesis of MgO-CaO-Al2O3-SiO2 Nanocomposite Powder by Polymeric Complex Method as a Novel Sintering Additive of AlN Ceramics", Electronic Materials Letters, 12(6), pp.732~737 (2016), 대한금속·재료학회[DOI]
- K. Agersted, , Int. J. Appl. Ceram. Technol, 15, pp.255~266 (2018)
- K. Chen, , Electron. Mater. Lett, 23, pp.1599~1603 (2012)
- S. Qi, , J. Mater. Sci. : Mater. Electron, 30, pp.6411~6418 (2019)
- G. K. Williamson, , Acta Metall, 1, pp.22~31 (1953)
- G. Mata-Osoro, , J. Eur. Ceram. Soc, 32, pp.2925~2933 (2012)