氧化鋁系列, 含量%
焦寶石 Chamotte: 30 ~ 50
莫來石 Mullite: 50 ~80
水鋁石 Bauxite: 70~85
棕剛玉 Brown Fused Alumina: 94~97
白鋼玉 WFA: 99
板狀剛玉 Tabular Alumina: 99
燒結氧化鋁 Sintered Alumina: 99
活性氧化鋁 : 95~99
活性氧化鋁 : 95~99
紅柱石Andalusite : 70
藍晶石 Cyanite: 70
其他類
氧化鋯 Zerconia : ZrO2 85~99.9
氧化鎂 MgO: 85~97
石英 Quartz: 99 SiO2 , 氧化矽
鋁鎂尖晶石 Spinel, 融熔氧化鋁70~90與氧化鎂10~26
鱗狀石墨 Flake Graphite, 添加於鎂碳磚/鋁碳磚時添加量7~15%
黏土類 Clay: Al2O3 含量20~30%
香港土
蛙目土
火山黏土 Bentonite
木節黏土
水洗球土 Ball Clay
添加物:
矽灰 Silica fume : SiO2 99%
高鋁水泥 Alumina Cement
矽膠水: 常見濃度50%.
鍛燒氧化鋁(原文)
Calcined (or alpha) alumina is made by roasting a source alumina powder at 1200-1300C to convert it to pure Al2O3 (when calcined near 2000C large hexagonal, elongated tablet shaped crystals form as "Tabular Alumina"). The alpha form is the densest and most stable crystalline form of alumina. It is insoluble in water but is soluble in hydrofluoric acid and potassium bisulfate.
Unground calcined aluminas are typically 100-300 mesh, but much finer grades (often called "Ground Alumina") are produced by milling. Calcined aluminas are available in numerous grades based on the heat treatment applied, crystal size, soda content, and degree of thermal conversion to alpha phase. Soda content is a major factor in determining the final use (low soda materials are used for electronic applications, medium soda for electrical insulation and porcelains, high soda for glass, glaze, fiberglass and electrical porcelain).
(自譯)鍛燒氧化鋁(又稱Alpha氧化鋁)是將鋁粉以1200~1300度加熱, 提升純度的氧化鋁. (溫度接近2000度的時候會形成板狀剛玉). Alpha狀態是最穩定也最密緻的氧化鋁結晶狀態, 不容於水, 但是溶於某些酸液.
未加磨的鍛燒鋁粒徑通常100-300目, 經過球磨之後可以變得更細.
Alpha 氧化鋁的等級會有多種因素決定, 例如熱處理加工, 晶體尺寸, 碳酸鈉含量, alpha狀態的受熱轉化程度等.
尤其是碳酸鈉含量會決定最終產品適用的用途, 低含量可用於電子產品, 中含量可用於電絕緣與陶瓷, 高含量可用於玻璃, 玻纖與電子陶瓷.
活性氧化铝是指经过充分细磨、以原晶尺寸大小1μm的α-Al2O3为基本组成（20%～90%）的煅烧氧化铝。
