Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

Mechanical Properties of AlN Ceramics Prepaerd from Al-isopropoxide

Al-isopropoxide로부터 합성한 AlN 세라믹스의 기계적 성질

  • Published : 1989.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

Aluminum nitride powder prepared from the hydroxides, AlOOH and Al(OH)3 which were obtained by hydrolysis of Al-isopropoxide, was densified at 1750 and 180$0^{\circ}C$ for 60 min by hot-pressing under the pressure of 25kg/$\textrm{cm}^2$. Theoretical density could be obtained at 175$0^{\circ}C$. Their flexural strengths were 450MPa and 395MPa for the specimens obtained from Al(OH)3 and AlOOH, respectively. There was no remarkable change in flexural strength up to 100$0^{\circ}C$. Fracture toughness values were 3.50MN/m3/2 for Al(OH)3 and 3.11MN/m3/2 for AlOOH. It is assumed that these differences in mechanical properties are due to the abnormal grain growth for the AlN ceramics obtained from AlOOH.

Keywords

References

  1. J.Mater Sci v.12 Effect of Oxygen on Sintering of AIN T.Sakai(et al.)
  2. Yogyo-Kyokai-Shi v.77 K.Komeya;H.Inoue
  3. 요업학회지 v.26 no.1 알콕사이드로 부터 AIN 분말의 합성 및 분말특성 이홍림;박세민;조덕호
  4. Modern Ceramic Engineering D.W.Richerson
  5. J.Am.Ceram.Soc v.59 no.7 Fracture Toughness Determination by Indentation A.G. Evans;E.A. Charles
  6. Yogyo-Kyokai-Shi v.89 no.6 Effect of Various Additives on Sintering of Aluminum Nitride K.Komeya(et al.)
  7. セラミシクス v.20 no.6 室化アルミこウム セラミツクス の開發 米屋勝利
  8. J.Am.Ceram.Soc v.57 no.9 Role of Y₂O₃and SiO₂Additions in Sintering of AIN K.Komeya(et.al.)
  9. J Electro.Soc. v.109 no.11 Luminescence in the System Al₂O₃-AIN I.Adams(et al.)
  10. Progress in Nitrogen Ceramics High Temperature Reactions and Microstures in the Al₂O₃-AIN System James W.McClauley(et al.); F.L.Riley(ed.)
  11. J.Am.Ceram.Soc. v.61 no.7-8 A Simple Model for Aluminum Oxynitride Spinels James W. McClauley
  12. U.S.Pat.No.4618592 Fine Powder of Aluminum Nitride, Composition and Sintered Body thereof and Process for their Production Kuramoto(et al.)
  13. Yogyo-Kyokai-Shi v.77 no.4 Sintering of Aluminum Nitride K.Komeya(et al.)
  14. 엔지니어링 세라믹스 이홍림(역)
  15. Progress in Nitrogen Ceramics Sintering of Aluminum Nitride with Low Oxide Addition K.A.Schwetz(et al.);F.L. Riley(ed.)