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.形成bAAl12O19的另一条途径是γ-Al2O3同分散相bA2＋之间的反应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.国家自然科学基
