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Alumina Ceramic

Main Composition: Al2O3 95%~99%
Application: mechanical equipment
Raw Material: Alumina
Color: White
Cold Crushing Strength: ≥2200 Mpa
Bulk Density: ≥3.65g/cm3
Capacity: 1000 MT per month
Package: Export wooden pallets
Product Introduction:
Alumina wear-resistant ceramic product is a new ceramic chemical material with low wear, high specific gravity and high hardness. mainly made of aluminum oxide (AL2O3) and sintered at a high temperature of 1700°C.

Material: Alumina ceramic              

Surface finish: As fired, grinding, polishing

Main properties of alumina ceramic plates:
1.Good strength and stiffness               
2.Extremely high hardness
3.Exceptional resistance to wear            
4.Good corrosion resistance to acid and alkali
5.High temperature resistance up to 1750ºC  
6.Excellent electrical insulation
7.Low dielectric constant and dielectric loss

Applications of Alumina Ceramic Plates:
Alumina ceramic products are suitable for use in mechanical equipment that needs protection from abrasion, as well as in systems for material delivery, pulverizing, ash or dust cleaning in thermal power production, and other applications. They are also suitable for various high-voltage and high-current applications.

Technical Data:
 
Material Unit 95% Al2O3 99% Al2O3 99.5% Al2O3 99.8% Al2O3
Purity % 95 99 99.5 99.8
Color --- White/Pink Ivory Ivory Ivory
Density g/cm3 3.65 3.85 3.90 3.92
Water Absorption % 0 0 0 0
Moh's Hardness --- 9 9 9 9
HV Hardness --- >1300 1700 1750 1800
Flexural Strength @25℃ Mpa 300 330 375 390
Fracture Toughness Mpa.M1/2 3~4 3~4 4 4
Compressive Strength (25℃) Mpa 2200 2350 2450 2500
Thermal Conductivity  @25℃ W/M.K 18-22 27 29 32
Thermal Expansion Coefficient
(25-1000℃)
10-6mm/℃ 8 8 8 8
Thermal Shock Resistance △T(℃) 220 180-200 180-200 180-200
Max. Working Temperature 1500 1700 1750 1750
Dielectric Strength Kv/Mm 16 20 22 22
Electrical Resistivity  (@25℃) Ω.Cm 1014 1014 1014 1014
Dielectric Constant 
(@1MHz, 25℃)
--- 9 9.7 9.7 9.8
Dielectric Loss (Tan Delta)
(@1MHz, 25℃)
--- 0.0004 0.0002 0.0001 0.0001
 
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