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首页> 外文期刊>日本セラミックス協会学術論文誌 >Compaction and Sintering Behavior of Silica Particles Surface-Modified by Al Chelate Compounds
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Compaction and Sintering Behavior of Silica Particles Surface-Modified by Al Chelate Compounds

机译：铝螯合物表面改性的二氧化硅颗粒的压实和烧结行为

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摘要

Al chelate compounds with different carbon chain lengths were synthesized through reactions of aluminum sec-butoxide with acetoacetic acid ethyl ester (n = 2), acetoacetic acid pentyl ester (n = 5), acetoacetic acid octyl ester (n =8) and acetoacetic acid oleyl ester (n = 18). Silica powder was modified with aluminum Sec-butoxide (ALK) and its Al chelate compounds abbreviated as C2, CS, C8 and C18 according to chain length. The effects of carbon chain length on the tap density, specific surface area, compaction and sintering behavior of modified silica were investigated. The tap density of modified silica decreased with an increase in the length of the carbon chain. In ALK, porous Al_2O_3 was formed by hydrolysis of aluminum sec-butoxide upon drying at l00 deg C. In contrast, in C2, CS, C8 and C18, porous Al_2O_3 was formed by thermal decomposition of Al chelate compounds above 200 deg C. The green density of the pressed bodies increased with an increase in the length of the carbon chain, resulting in the decrease in the porosity of sintered bodies fired at 1400-1500 deg C.
机译：通过仲丁醇铝与乙酰乙酸乙酯（n = 2），乙酰乙酸戊酯（n = 5），乙酰乙酸辛酯（n = 8）和乙酰乙酸的反应合成了具有不同碳链长度的铝螯合物油酯（n = 18）。二氧化硅粉用仲丁醇铝（ALK）改性，并且根据链长将其铝螯合物缩写为C2，CS，C8和C18。研究了碳链长度对改性二氧化硅的振实密度，比表面积，压实度和烧结行为的影响。改性二氧化硅的振实密度随碳链长度的增加而降低。在ALK中，在100摄氏度下干燥时，通过仲丁醇铝的水解形成多孔Al_2O_3。相反，在C2，CS，C8和C18中，通过200摄氏度以上的铝螯合物的热分解形成多孔Al_2O_3。压制坯料的生坯密度随碳链长度的增加而增加，从而导致在1400-1500℃烧成的烧结体的孔隙率降低。

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