한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제26권3호
  • /
  • Pages.347-360
  • /
  • 1989
  • /
  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
권호 표지

분무열분해법으로 제조한 MgO-Al2O3-SiO2계 화합물분체의 소결성

A Study on the Sinterability of MgO-Al2O3-SiO2 System Ceramic Powders Prepared by Spray Pyrolysis Method

  • 박정현 (연세대학교 공과대학 요업공학과) ;
  • 박찬욱 (연세대학교 공과대학 요업공학과) ;
  • 조경식 (연세대학교 공과대학 요업공학과)
  • 발행 : 1989.03.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Spinel, mullite, forsterite and cordierite composition powders were synthesized from Mg(NO3)2.6H2O, Al(NO3)3.9H2O and SiCl4-ethanol solution by spray pyrolysis method and the sinterability of these powders were investigated. The bulk density of spinel and mullite specimens sintered at 1,$700^{\circ}C$ for 1hr was 3.56g/㎤(99.5% relative density) and 3.16g/㎤(99.7% relative density), respectively. (Green compacts were made from powders prepared at 1,00$0^{\circ}C$). The bulk density of forsterite and cordierite specimens sintered at 1,480 and 1,40$0^{\circ}C$ for 2hrs were 3.217 and 2.155g/㎤, respectively. (Green compacts were made from powders prepared at 1,00$0^{\circ}C$). The constituent compositions of spinel and mullite specimens sintered at 1,$700^{\circ}C$ for 1hr were 27.5wt% MgO and 70.5wt% Al2O3, respectively. Vickers microhardness and fracture toughness of spinel sintered at the above condition were 13.7GPa and 2.6MN.m3/2, respectively, and room temperature bending strength, 425MPa, was nearly maintained even at the elevated temperature. In the case ofmullite specimens, those values were 13.5GPa, 2.2MN/m3/2 and 430MPa, respectively.

키워드

참고문헌

  1. J.Am.Ceram.Soc. v.57 no.7 Translucent Sintered MgAl₂O₄ R.J.Bratton
  2. Am.Ceram.Soc,Bull. v.50 no.5 Magnesia-Rich MgAl₂O₄Spinel Ceramics J.T.Bailey(et al.)
  3. Yogyo-Kyokai-Shi v.87 no.5 Effect of Non-Stoichiometry on Microstructure and Mechanical Strength of Mg-Al Spinel Ceramics S.Kanzaki(et al.)
  4. J.Kor.Ceram.Soc. v.19 no.3 A Study on the Forsterite Porcelain as a High Frequency Insulator(Ⅱ) E.S.Lee(et al.)
  5. Yogyo-Kyokai-Shi v.67 no.10 Properties of Forsterite Porcelain Containing Excess Silica, Fosterite Porcelain as High Frequency Insulator(Ⅰ) M.Sugiura(et al.)
  6. J.Mat. Sci.Let. v.3 Thermal Expansion of Hot-Pressed Cordierite Glass Ceramics Y.Hirose(et al.)
  7. J.Am.Ceram.Soc. v.68 no.4 Coalescence and Crystallization in Powdered High-Cordierite(2MgO 2Al₂O₃ 5SiO₂) K.Watanabe(et al.)
  8. J.Kor.Ceram.Soc. v.25 no.4 A Study on the Preparation of MgO-Al₂O₃-SiO₃System Ceramic Powders by Spray Pyrolysis Method J.H.Park(et al.)
  9. Modern Ceramic Engineering D.W.Richerson
  10. J.Am.Ceram.Soc. v.59 no.7 Fracture Toughness Determination by Indentation A.G.Evans(et al.)
  11. Yogyo-Kyokai-Shi v.91 no.4 Sintering of Spray Pyrolyzed Mg-Al Spinel Powder S.Kanzaki(et al.)
  12. Characterization and Sintering of Reactive MgAl₂O₄ Spinel v.48 no.11 R.J.Bratton
  13. Verlag Deutsche Keramische Gesellschaft Ceramic Materials and Components for Engines H.Ohnishi(et al.)
  14. Phase Diagrams for Ceramists E.M.Levin(et al.)
  15. J.Kor.Ceram.Soc. v.19 no.3 A Study on the Forsterite Pocelain as a High Frequency Insulator(Ⅱ)(Influence of BaCO₃, excess Mgo on the Properties Forsterite Porcelain) Eung-Sang Lee(at al.)
  16. J.Am.Ceram.Soc. v.63 no.11-12 Thermal Expansion and Chemical Modifications of Cordierite D.L.Evans(et al.)
  17. Yogyo-Kyokai-Shi v.95 no.2 Preparation of Cordierite Ceramics from Metal Alkoxide (Park 2)-Sintering- H.Suzuki(et al.)
  18. J.Am.Ceram.Soc. v.70 no.10 Effect of Sol-Gel Mixing or Mullite Microstructure and Phase Equilibria in the α-Al₂O₃-SiO₃ System J.A.Pask(et al.)
  19. Verlag Deutsche Keramische Gesellschaft Ceramic materials and Components for Engines S.Kanzaki (et al.)
  20. J.Am.Ceram.Soc. v.66 no.10 Mechanical Properties of Mullite T.Mah(et al.)