氧化鋁，化學(xué)符號：Al2O3  、分子量102，純凈氧化鋁是白色無定形粉末，俗稱礬土，密度3.9-4.0g/cm3，熔點(diǎn)2050℃、沸點(diǎn)2980℃，不溶于水，為兩性氧化物，能溶于無機(jī)酸和堿性溶液中，有四種同素異構(gòu)體β－氧化鋁δ－氧化鋁v－氧化鋁a－氧化鋁 ，主要有α型和γ型兩種變體，工業(yè)上可從鋁土礦中提取。
 
   在α型氧化鋁的晶格中，氧離子為六方緊密堆積，Al3+對稱地分布在氧離子圍成的八面體配位中心，晶格能很大，故熔點(diǎn)、沸點(diǎn)很高。α型氧化鋁不溶于水和酸，工業(yè)上也稱鋁氧，是制金屬鋁的基本原料；也用于制各種耐火磚、耐火坩堝、耐火管、耐高溫實(shí)驗(yàn)儀器；還可作研磨劑、阻燃劑、填充料等；高純的α型氧化鋁還是生產(chǎn)人造剛玉、人造紅寶石和藍(lán)寶石的原料；還用于生產(chǎn)現(xiàn)代大規(guī)模集成電路的板基。
 
   γ型氧化鋁是氫氧化鋁在140-150℃的低溫環(huán)境下脫水制得，工業(yè)上也叫活性氧化鋁、鋁膠。其結(jié)構(gòu)中氧離子近似為立方面心緊密堆積，Al3+不規(guī)則地分布在由氧離子圍成的八面體和四面體空隙之中。γ型氧化鋁不溶于水，能溶于強(qiáng)酸或強(qiáng)堿溶液，將它加熱至1200℃就全部轉(zhuǎn)化為α型氧化鋁。γ型氧化鋁是一種多孔性物質(zhì)，每克的內(nèi)表面積高達(dá)數(shù)百平方米，活性高吸附能力強(qiáng)。工業(yè)品常為無色或微帶粉紅的圓柱型顆粒，耐壓性好。在石油煉制和石油化工中是常用的吸附劑、催化劑和催化劑載體；在工業(yè)上是變壓器油、透平油的脫酸劑，還用于色層分析；在實(shí)驗(yàn)室是中性強(qiáng)干燥劑，其干燥能力不亞于五氧化二磷，使用后在175℃以下加熱6-8h還能再生重復(fù)使用。
 
   目前世界上用拜耳法生產(chǎn)的氧化鋁要占到總產(chǎn)量的90％以上，氧化鋁大部分用于制金屬鋁，用作其它用途的不到10％
 
 
alumina
 
 
 
Aluminum oxide, chemical symbol: Al2O3, molecular weight 102, pure alumina is a white amorphous powder, commonly known as alumina, 3.9 4.0 g/cm3 density, melting point 2050 ℃, boiling point 2980 ℃, insoluble in water, for both sexes oxide, soluble in inorganic acid and alkaline solution, and there are four kinds of isomer with element beta-alumina delta - - a - alumina, alumina v are alpha and gamma two variations, industry can be extracted from bauxite.
 
 
 
In the lattice type alpha alumina, oxygen ions as the six-party close packing, Al3 + symmetrically distributed in oxygen ion of octahedral coordination center, lattice energy is very big, therefore, a high melting point, boiling point. Alpha alumina insoluble in water and acid, also known as alumina industry, is the basic raw material of aluminum; Also used for making all kinds of firebrick, refractory crucible, fire pipe, high temperature resistant experiment instrument; Can also be abrasive, flame retardants, fillers, etc; The alpha type of high purity alumina or production of raw materials of synthetic corundum, synthetic ruby and sapphire; Also used in the production base of modern large scale integrated circuit board.
 
 
 
Gamma alumina is aluminum hydroxide in the dehydration system of 140-150 ℃ low temperature environment, industry also called activated alumina, aluminium glue. Oxygen ion in the structure approximation is made in heart tightly packed, Al3 + irregularly distributed in octahedral surrounded by oxygen ions and tetrahedral gap. Gamma alumina insoluble in water, soluble in acid or alkali solution, will it all into a heated to 1200 ℃ alpha alumina. Gamma alumina is a porous material, the inside surface area per gram of up to hundreds of square meters, high active adsorption ability. Industrial products usually colorless or microstrip pink cylindrical particles, good pressure resistance. In petroleum refining and petrochemical industry is a commonly used adsorbent, catalyst and catalyst carrier; In industry is the transformer oil, turbine oil, acid agent, also used for chromatographic analysis; Strong desiccant is neutral in the laboratory, the drying capacity as phosphorus pentoxide, use after 6 to 8 h under 175 ℃ heating regeneration reuse.
 
 
 
Currently using bayer process of alumina production in the world want to account for over 90% of the total output, most of alumina used for aluminum, as less than 10% for other USES

CAS : 優(yōu)級 ;
執(zhí)行質(zhì)量標(biāo)準(zhǔn) : 國標(biāo) ;
包裝規(guī)格 : 50KG/包 ;
用途 : 制金屬鋁的基本原料；也用于制各種耐火磚,耐火坩堝,耐火管,耐高溫實(shí)驗(yàn)儀器；還可作研磨劑,阻燃劑,填充 ;
含量 : 98（％） ;
產(chǎn)品等級 : 高純氧化鋁 ;
產(chǎn)商/產(chǎn)地 : 河南 ;
型號 : 供應(yīng) ;

廣州學(xué)宇貿(mào)易有限公司 經(jīng)銷批發(fā)的鈦白粉、立德粉、高嶺土、乳化劑、透明粉、滑石粉、重鈣、硫酸鋇、二氧化硅、氫氧化鋁、鈦白粉暢銷消費(fèi)者市場，在消費(fèi)者當(dāng)中享有較高的地位，公司與多家零售商和代理商建立了長期穩(wěn)定的合作關(guān)系。廣州學(xué)宇貿(mào)易有限公司經(jīng)銷的鈦白粉、立德粉、高嶺土、乳化劑、透明粉、滑石粉、重鈣、硫酸鋇、二氧化硅、氫氧化鋁、鈦白粉品種齊全、價格合理。廣州學(xué)宇貿(mào)易有限公司實(shí)力雄厚，重信用、守合同、保證產(chǎn)品質(zhì)量，以多品種經(jīng)營特色和薄利多銷的原則，贏得了廣大客戶的信任。
品牌名稱 : 學(xué)宇