Synthesis of Sodium Beta Alumina Films by Heat Treatment of Sodium Aluminum Oxides
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2016年第1期
论文作者：池晨 Hirokazu KATSUI Takashi GOTO
文章页码：6 - 10
摘 要：Sodium beta alumina（Na-β-alumina） films were synthesized by heat treatment of NaAl6O9.5and γ-NaA1O2 films at temperatures of 1 373-1 573 K.Single-phase γ-NaA1O2 and NaAl6O9.5 films were prepared by laser chemical vapor deposition at the deposition temperatures of 976 and 1 100 K,respectively.Subsequent heat treatment of the films resulted in the formation of Na-β-alumina with α-Al2O3 at temperatures above 1 373 K for NaAl6O9.5 and 1 473 K for γ-NaA1O2.On heat treatment at temperatures of 1 473-1 573 K,the faceted morphology with terraces of the as-deposited（110）-oriented γ-NaAlO2 films transformed to a porous morphology with platelet grains comprising Na-β-alumina and α-Al2O3.On heat treatment at temperatures of1 373-1 473 K,the pyramidal,faceted grains of as-deposited NaAl6O9.5 films transformed to planer,shapeanisotropic morphology in the film of mixed Na-β-alumina and α-Al2O3.A dense morphology was observed in both the as-deposited and heat-treated NaAl6O9.5 films.
池晨1,2，Hirokazu KATSUI2，Takashi GOTO2
1. Key Laboratory for Green Chemical Process of Ministry of Education,Chemical Engineering and Pharmacy,Wuhan Institute of Technology2. Institute for Materials Research,Tohoku University
摘 要：Sodium beta alumina（Na-β-alumina） films were synthesized by heat treatment of NaAl6O9.5and γ-NaA1O2 films at temperatures of 1 373-1 573 K.Single-phase γ-NaA1O2 and NaAl6O9.5 films were prepared by laser chemical vapor deposition at the deposition temperatures of 976 and 1 100 K,respectively.Subsequent heat treatment of the films resulted in the formation of Na-β-alumina with α-Al2O3 at temperatures above 1 373 K for NaAl6O9.5 and 1 473 K for γ-NaA1O2.On heat treatment at temperatures of 1 473-1 573 K,the faceted morphology with terraces of the as-deposited（110）-oriented γ-NaAlO2 films transformed to a porous morphology with platelet grains comprising Na-β-alumina and α-Al2O3.On heat treatment at temperatures of1 373-1 473 K,the pyramidal,faceted grains of as-deposited NaAl6O9.5 films transformed to planer,shapeanisotropic morphology in the film of mixed Na-β-alumina and α-Al2O3.A dense morphology was observed in both the as-deposited and heat-treated NaAl6O9.5 films.
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