Hardness 85 95% 99% 99.7% High Purity Alumina / Aluminum Oxide Ceramic Round Plate

Delivery Time:Depends on the quantity, always in a month.
Certification:ROHS

Hardness ≥85 95% 99% 99.7% High Purity Alumina / Aluminum Oxide Ceramic Round Plate

Description:

Alumina products have the performances of high purity,good hermetical property,good hardness,low abrade,anti-corrode,high grinding efficiency,no pollution.

Widely implicated in the areas of ceramic,electric power,petroleum,chemical industry and light industry, they are the liner and grinding medium for various ceramic material, α-Al2O3 powder, flake alumina, kaolin, fusible corundum,porcelain enamel,dye,ceramic glaze,dope,printing ink,special glass,various ball mill machines.

1. big hardness

2. excellent wearable ability

3. high quality with low price

4. good heat-resistant

5. light weight

Applications:

Our products can be used in mechanical,electronics,chemical,textile,aeronautic and other fields.

Specifications:

95%,99%,99.7% Al2O3 Material Parameters:

Item	Test Condition	Unit Symbol	95%Alumina  ceramics	99%Alumina  ceramics	99.7%Alumina  ceramics
The main chemical  ingredient			Al2O3	Al2O3	Al2O3
Bulk Density		g/cm3	3.6	3.89	3.96
Maximum Use  Temperature			1450℃	1600℃	1650℃
Water absorption		%	0	0	0
ROHS Hardness			≥85	≥89	≥89
Flexural strength	20° C	MPa (psi x 103)	358 (52)	550	550
Compressive Strength	20° C	MPa (psi x 103)	2068 (300)	2600(377)	2600(377)
Fracture Toughness	K(I c)	Mpa m1/2	4-5	5.6	6
Coefficient of  thermal expansion	25-1000° C	1X 10-6/°C	7.6	7.9	8.2
Coefficient of  thermal conductivity	20° C	W/m °K	16	30.0	30.4
Thermal Shock Resistance	Tc	°C	250	200	200
Dielectricity constant	1MHz.25℃		9	9.7	9.7
Dielectric strength