Calcined alumina can be used in the polishing of different alumina products(mainly used in middle, fine polishing).It is also widely used in high-class aluminium refractory material, unshaped refractory materials, high aluminium ceramic product and advanced coating, etc, .
Item Al2o3
% Na2o
% Sio2
% Fe2o3
% D50
A4m 99.8 0.1 0.05 0.02 3.1
We are exporter of Calcined Alumina. According to different requirements, five series of products have been formed, including dry pressing, hot die casting, refractory, casting and setting, structural ceramic granulator, etc. It can be widely used in electronic equipment, structural ceramics, refractories, wear-resistant materials, polishing materials and other industries.
CALCINED ALUMINA 95%
Alumina (Al2O3), the industrial Al2O3 is prepared from alumina (Al2O3, 3H2O) and hard alumina, and the Al2O3, which is high in purity, is usually prepared by chemical methods. Al2O3 has many isomorphic crystals, and there are currently more than 10 known types, mainly three types of crystal, namely gamma-al2o3, beta-al2o3, alpha-al2o3.Which structure is different, with different properties in high temperature above 1300 s almost entirely into alpha Al2O3.
High conversion rate and crystal stability and low impurities. Its products have the excellent performance of high mechanical strength, stable shrinkage rate, good electrical insulation, high wear resistance, and outstanding corrosion resistance.
Calcined alumina powder in gamma, alpha phase Calcined alumina powder in gamma, alpha phase
Calcined alumina powder Chemical composition: Al2o3 99.5% Sio2 0.06%max Fe2o3 0.03%max Na2o 0.2%max Size:325mesh;3-5um A.40*25kg/bag packed in one big bags B.1.2mt/bag or 1mt/bag
Calcined Alumina It is white crystalline powder.It has high chemical purity,steady property,well sintering property.It is the basic raw material of high-grade ceramics and refractory products which are wear resistanct,heatproof,and corrosion-resistant,etc.The active a-Al203 us characterized by low absorbing water rate,well fluidity,high sintering density and high strength under high temperature.It is specially used for producing unformed refractory materials. Chemical data sheet Size Al2O3 Fe2O3 Na2O SiO2 Density Loss on lgnition a-Al203 % % % % g/cm3 % % AF601-C 99.5 0.04 0.15 0.06 3.96 0.10 96.0 AF 620HC 99.5 0.03 0.15 0.10 3.95 0.10 95.0 AF 603DC 99.5 0.03 0.25 0.06 3.95 0.10 94.0 AF 604ZC 99.5 0.03 0.30 0.06 3.95 0.10 93.0 . Note: The median particle size of above product can be made into special size according to your requirement. Also we can adjust the other specification according to your requirement. 25 kg / bag/50kg/bag/ton bag.
High-Performance Calcined Alumina Powder a- Al203 has good high temperature performance, Calcined Alumina Powder is widely used in ceramic industry, monolithic refractories and shaped refractories products. According to the degree of grinding and crystal size, Calcined Alumina Powder plays the different roles in ceramics and refractory industry. 1. Increase the content of alumina in the using of natural raw material formula in order to improve the refractoriness and mechanical properties. 2. Increase the amount of fine powder accumulate in order to improve the mechanical strength and wear resistance. 3. Through the reaction with binder such as cement into the stability of high refractoriness, and excellent reting matrix. a- Alumina Powder chemical and physical composition: Composition Specification Al203 Fe203 Na20 Si02 a-Al203 True Specific Gravity High Temperature Calcined Low Temperature Calcined By optimizing the particle accumulation to reduce water added in monolithic refractories
Product performance: This product has the advantages of high conversion rate, stable crystal form, low impurity content, significant true ratio, and reduced ignition. Its product has low longitudinal and transverse shrinkage, excellent electrical insulation performance, wear resistance, corrosion resistance, and high temperature resistance. Product Usage: The product is widely used in various abrasive tools, wear-resistant fillers, and for preparing various ceramic grade and refractory grade micro powders. It is used as a raw material for high aluminum, high-purity structural ceramics, electronic components, high-frequency insulation ceramics, and high aluminum ceramic balls. Product quality: The product quality is stable, and it is a domestic high-temperature alumina manufacturer with an annual production capacity of 120000 tons.
