Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

Synthesis of AlN-SiO2-Al2O3 System

AlN-SiO2-Al2O3계로부터 AlN-Polytypes의 제조

  • Published : 1989.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

In order to synthesize AlN-polytypes from AlN-SiO2-Al2O3 system, composition A (AlN/SiO2/Al2O3=1/0.3/0.05, mole ratio) and composition B(AlN-SiO2-Al2O3=1/0.2/0.05, mole ratio) were used. AlN-polytypes were produced by nitriding the mixture at 175$0^{\circ}C$~190$0^{\circ}C$ under N2 atmosphere. For lower reaction temperature, 15R phase was produced and in the case of higher reaction temperature, AlN phase was only produced. As each composition was heated at 185$0^{\circ}C$ in N2 atmosphere, produced main phases were 15R phase for composition A and 21R phase for composition B respectively. The fracture surfaces of produced reactants showed porous skeleton structure.

Keywords

References

  1. J. Mat. Sci. v.11 no.6 Sialons and Related Nitrogen Ceramics K.H.Jack
  2. J. Am. Ceram. Soc. v.58 no.7-8 Contribution to the phase Diagram $Si_3N_4-AIN-Al_2O_3-SiO_2$ L.J. Gauckler;G. Petzow
  3. Yogyokyokai-Shi. v.89 no.11 Formation of AIN Polytype Ceramics and Some of Their Properties K.Komeya;A.Tsuge
  4. J. Mat. Sci. v.19 no.3 Structure of Special grain boundaries in Sialon Ceramics H.Schmid;M.Ruhle
  5. Mat. Res. Bull. v.13 The Sialons K.H.Jack
  6. J. Mat. Sci. Letters v.13 Direct Observation of the Polytype Periodicties in the Be-Si-O-N System D.P.Thompson
  7. J. Mat. Sci. v.14 The Microstructure of Hot-pressed Sialon Polytypes P.M.Johnson;A.Hendry
  8. Progress in Nitrogen Ceramics The Structural Chaicatreisation of Sialon Polytypoids D.P.Thompson;F.L.Riley(ed.)
  9. JANAF Themochemical Tables(2nd ed.). NBS Ref DATA Nat. Bur Stand
  10. J. Am. Ceram. Soc. v.57 no.9 Role of Y₂O₃and SiO₂Additions in Sintering of AIN K.Komeya;H.Inoue;A.Tsage
  11. Trans. J. Brit. Ceram. Soc. v.70 no.3 Influence of Fibrous Aluminum Nitride on Strength of Sintered AIN-Y₂O₃ K.Komeya;H.Inoue