摘要
BaAl12O19是一种被用于高温催化燃烧的β-Al2O3型材料.在其制备过程中可采用柠檬酸盐无定形前驱体法.它在130℃的分解反映出硝酸盐与自由羰基的相互作用;360℃的分解对应于柠檬酸盐的氧化;在800℃时,BaCO3分解并生成BaAl2O4.BaAl2O4的产生并没有抑制BaAl12O19的形成.
BaAl 12 O 19 is one of the β Al 2O 3 type materials used in high temperature catalytic combustion. In the preparation, the citric amorphous precursor method was employed. The decomposition at 130 ℃ connected with the reaction between nitrates and free carbonyl groups,while the decomposition at 360 ℃corresponded to the oxidation of the citrate chains.At 800 ℃ commenced the decomposition of BaCO 3 and the formation of BaAl 2O 4. The presence of the latter does not inhibit the formation of BaAl 12 O 19 . Another pathway for the formation of BaAl 12 O 19 is the reaction between dispersed barium oxide and γ Al 2O 3.
出处
《厦门大学学报(自然科学版)》
CAS
CSCD
北大核心
1997年第2期240-245,共6页
Journal of Xiamen University:Natural Science
基金
国家自然科学基金
关键词
高温催化燃烧
制备
六铝酸钡
热稳定材料
BaAl 12 O 19 , Citrate precursor, Catalytic combustion, Al 2O 3 supported material