摘要
采用固相反应法合成了钙钛矿型Ba0.5Sr0．5Co0．8Fe0．1Cr0．103-δ（X=0.00，0．10）透氧膜粉体。利用XRD和SEM研究了Ba0.5Sr0．5Co0．8Fe0．1Cr0．103-δ（x=0．00，0．10）的晶体结构和烧结性能，考察了在700～850℃范围内Ba0.5Sr0．5Co0．8Fe0．1Cr0．103-δ（x=0．00，0．10）膜片的氧渗透性能。结果表明，它们均显示出优良的透氧性能，850℃时的透氧量分别为1．05mL／（min·cm2）、0．85mL／（min·cm2）。透氧稳定性的研究表明，Cr掺杂Ba0.5Sr0．5Co0．8Fe0．1Cr0．103-δ在800℃时显示出较高的稳定性，证实用Cr离子部分取代Ba0.5Sr0．5Co0．8Fe0.2O3-δ的Fe离子能明显提高钙钛矿的结构稳定性。
The Cr-doped Ba0.5Sr0.5Co0.8Fe0.1Cr0.103-δ（x=0.00, 0.10） perovskite oxide powders were synthe- sized by the solid state reaction method. Crystal structure and sintering properties of the oxides were studied by XRD and SEM. Oxygen permeation fluxes through the dense Ba0.5Sr0.5Co0.8Fe0.1Cr0.103-δ （x= 0.00, 0. 10） membranes were measured in the temperature range of 700-850℃. The results demonstrate the perovskite membranes possess excellent oxygen permeability, and the oxygen permeation flux of Ba0.5Sr0.5Co0.8Fe0.1Cr0.103-δ（x= 0. 00, 0. 10） at 850℃ is 1.05mL/（min· cm2） and 0.85mL/（min· cm2）, respectively. The improved oxygen permeation stability of the Cr-doped Ba0.5Sr0.5Co0.8Fe0.1Cr0.103-δ membrane was observed at a lower temperature of 800℃ which is ascribed to the enhanced structural stability when the Fe cations of the perovskite Ba0.5Sr0.5Co0.8Fe0.1Fe0.2O3-δ a were partially substituted by Cr cations.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2011年第2期43-46,共4页
Materials Reports
基金
河南工业大学博士基金
关键词
钙钛矿透氧膜透氧性能稳定性
perovskite, oxygen permeable membranes, oxygen permeability, stability
