| 【文章摘要】 Sodium beta alumina(Na-β-alumina) films were synthesized by heat treatment of NaAl_6O_(9.5)and γ-NaA1O_2 films at temperatures of 1 373-1 573 K.Single-phase γ-NaA1O_2 and NaAl_6O_(9.5) 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-Al_2O_3 at temperatures above 1 373 K for NaAl_6O_(9.5) and 1 473 K for γ-NaA1O_2.On heat treatment at temperatures of 1 473-1 573 K,the faceted morphology with terraces of the as-deposited(110)-oriented γ-NaAlO_2 films transformed to a porous morphology with platelet grains comprising Na-β-alumina and α-Al_2O_3.On heat treatment at temperatures of1 373-1 473 K,the pyramidal,faceted grains of as-deposited NaAl_6O_(9.5) films transformed to planer,shapeanisotropic morphology in the film of mixed Na-β-alumina and α-Al_2O_3.A dense morphology was observed in both the as-deposited and heat-treated NaAl_6O_(9.5) films. |