alumina calcined 中文意思是什麼
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Ajs20, the precursor contained 20wt % alunina sol seeding, was calcined at around 1000 to get free - aggregation nano - sized a - alaos powders with a median particle size of 70nm. and, calcining ajs2, the precursor contained 2wt % alumina sol seeding, at hoo ' c, we get a - alaos nano - sized powders with a particle size of loonm and good dispersion by tem. this paper also gives the proper mechanisms of these factors " influences on the transformation to alpha phase
研究結果顯示，含有20wt膠體籽晶的前驅體ajs20在1000左右煅燒就可獲得平均粒徑為70nm 、無團聚的納米- al _ 2o _ 3粉體；而含有2wt膠體籽晶的前驅體ajs2在1100即可獲得粒徑在100nm左右、幾乎單顆粒分散、有少量「樹枝狀」微結構的納米- al _ 2o _ 3粉體。 -
The magnesia - alumina spinel is synthesized by using high - quality bauxite and active magnesia as starting materials and calcined at high temperatures. the spinel has high density and low water absorption rate
本品採用優質鋁礬土與活性氧化鎂合成，經高溫煅燒，體積密度大，吸水率低，是冶金建材行業理想的原料。 -
The research results revealed that activated alumina content of calcined kaolin of kaolin had a strong correlation with the calcined temperatures and time. the activated alumina content of calcined kaolin increased with the calcined temperatures increasing from 750 c to 950 c, and increased with the calcined time prolonging at 750 c, 800 c, 850 c, 900 c and 950 c. however, the elevated speed of the activated alumina content decreased at 950 c for 4h
研究發現，高嶺土的煅燒溫度及煅燒時間對煅燒高嶺土中的活性氧化鋁的含量具有較大的影響：高嶺土在750 、 800 、 850 、 900 、 950溫度下煅燒，其活性氧化鋁含量隨溫度和時間的增加而增加，但在950 、 4h時后活性氧化鋁的增加速度降低。 -
The activated alumina content had a reduce with time prolonging from 2h to 5h at calcined temperature of 1000 c. the research results also revealed that products obtained by sudden cooling from high temperature had a higher content of activated alumina than that by cooling naturally
1000時煅燒高嶺土中活性氧化鋁的含量在煅燒時間2h 5h隨煅燒時間的延長還有所下降。另外，高嶺土煅燒后採用急冷方法比採用自然降溫方法中制得的煅燒高嶺土具有更高的活性氧化鋁含量。
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