Alumina Ceramic Ring

High-purity Alumina Ceramic Seal Ring
Specifications:
1. High density;
2. High hardness;
3. Low thermal conductivity;
4. Chemical inertness;
5 .Resistance to molten metals;
6. Good Wear resistance;
7. High fracture toughness;
8. Good insulation performance and high temperature resistance.

Chemical Properties:

Table1: Technical Parameter Of Alumina Ceramics
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		o C	1450	1600	1650
Water Absorption		%	0	0	0
ROHS Hardness			≥ 85	≥   89	≥ 89
Flexural Strength	20 o C	Mpa(psi*103 )	358(52)	550	550
Compressive Strength	20  o C	Mpa(psi*103 )	2068(300)	2600(377)	2600(377)
Fracture Toughness	K(lc)	Mpa m 1/2	4-5	5.6	6
Coefficient Of Thermal Expansion	25-1000 o C	1*10 -6 /o C	7.6	7.9	8.2
Coefficient Of Thermal Conductivity	20 o C	W/mk	16	30.0	30.4
Thermal Shock Resistance	Δ Tc	o C	250	200	200
Dielectricity Constant	1MHz. 25 o C		9	9.7	9.7
Dielectricity Strength		ac-kV/mm(ac V/mil)	8.3(210)	8.7(220)	8.7(220)
Volumn Resistivity	100 o C	ohm-cm	> 1013	> 1014	> 1014

Applications:
1, ceramic shaft for aquatic animals equipment filter pump
2, Ceramic plunger for high pressure cleaner.
3,Wearlessness,resistant acid-base and high intensity ceramic assembly apply to petroleum ,chemical and chemical industry.
4,Wearlesness, corrosion resistance, thermostable parts apply to precision machine.