Supply ceramic alumina high purity alumina calcined alumina-α-alumina
Breif Introdiction--------- calcined alumina powder
Active / Calcined alpha-AL2O3 Powder
High temperature calcined alumina powder has high melting point, excellent mechanical strength, hardness, high resistivity and thermal conductivity. It can be widely used in electronic equipment, structural ceramics, refractories, wear-resistant materials, polishing materials and other industries.
I. traits
Molecular formula: AL203 Molecular weight: 101.96 Melting point: 2050 ° C
Specific gravity: r-AL203 3.40 ~ 3.90 g / cm3
α-AL203 3.90 ~ 4.00 g / cm3
High purity, ultra-fine, uniform particle size distribution, odorless white powder.
Uses
Long afterglow phosphors; three-primary phosphors; abrasive materials; transparent ceramics, high-pressure sodium lamps; catalyst carriers; EP-ROM windows; polycrystalline: rubies, sapphires; electronic ceramics and bioceramics
Characteristic--------
- White powder or fine sand
- Crystal structure stability
- Insoluble in water
- Difficult to dissolve in acid and alkali solution
- Good thermal stability
- Easy to grind
- Easy sintering
Main uses--------
- High temperature refractories
- Castable
- Electric porcelain device
- Automobile spark plug
- High alumina porcelain parts
- Wear-resistant Porcelain Parts
- Good for electronic substrate
- Abrasive material
- Polishing material
- high alumina structural ceramic
- various abrasives ,abrasive tools and fillers
- Fine powder of various ceramic and refractory grade alumina
Alumina Powder
Industrial alumina powder---Metallurgical grade alumina powder
Calcined alumina--- mainly used in ceramics, refractories, glazing etc
White fused alumina--- used in refractory,grinding&polishing,abrasives
Tabular alumina--- used in refractory
Specification of calcined alumina:
ITEM NO. | PHASE | Al2O3 | Na | Fe | Ca | Si | Cu | Mg | Ti | Cr | D50 | BULK DENSITY | SPECIFC SURFACE AREA |
01 | α-Al2O3 | ≥99.999 | ≤2 | ≤1 | ≤1 | ≤2 | ≤1 | ≤1 | ≤1 | ≤1 | 1~40 | 0.3~0.5 | 2~10 |
02 | γ-Al2O3 | ≥99.999 | ≤2 | ≤1 | ≤1 | ≤2 | ≤1 | ≤1 | ≤1 | ≤1 | 1~40 | 0.2~0.5 | ≥60 |
Items
| Chemical components
|
a-Al2O3
| Effective density g/cm3 | Primary crystal size D50 um | Particle size D50 um | ||||
Al2O3 % | SIO2 % | Fe2O3 % | Na2O % | L.O.I. % | |||||
AC-30 | ≥99.2 | ≤0.10 | ≤0.04 | ≤0.35 | ≤0.20 | ≥94 | ≥3.93 | 3-5um |
75-90um |
AC-30A | ≥99.2 | ≤0.01 | ≤0.04 | ≤0.35 | ≤0.20 | ≥93 | ≥3.93 | 1.5-3.5um | |
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