Alumina Ceramic Parts

Since the sintering temperature is as high as 1650-1990°C and the transmission wavelength is 1 to 6 μm, the molten glass is generally used to replace the platinum crucible and alkali-resistant metal corrosion is used as a sodium lamp; it can be used as an integrated circuit substrate and high-frequency insulation material in the electronics industry.

Product Details

Product Introduction:

Alumina ceramics are classified into high-purity type and ordinary type.

The high-purity alumina ceramics have Al₂O₃ content of 99% or more. Since the sintering temperature is as high as 1650-1990°C and the transmission wavelength is 1 to 6 μm, the molten glass is generally used to replace the platinum crucible and alkali-resistant metal corrosion is used as a sodium lamp; it can be used as an integrated circuit substrate and high-frequency insulation material in the electronics industry.

Ordinary alumina ceramics are classified into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain, 65 porcelain etc. according to the content of Al₂O₃. Among them, 99 alumina ceramic materials are used to make high temperature crucibles, refractory furnace tubes and special wear-resistant materials, such as ceramic bearings, ceramic seals and water valve sheets; 95 alumina ceramics are mainly used as corrosion-resistant and wear-resistant parts; In addition, due to the incorporation of part of talc, the electrical properties and mechanical strength are improved, and it can be sealed with metals such as molybdenum, niobium and tantalum, and some are used as electric vacuum device devices.

Data Sheet:

Aumina Ceramic Properties		95% Alumina Ceramic	99% Alumina Ceramic
Item	Unit	Typical Values
Physical Properties
Color		White	Ivory
Density	g/cm³	3.7	3.85
Alumina Content	%	≥95%	≥99%
Gas permeability		0	0
Water Absorption		0.01%	0.01%
Mechanical Properties
Rockwell Hardness	HRA	80	82
Vickers Hardness (Hv50)	Gpa (Kg/mm²)	15.7 (1600)	15.7 (1600)
Flexural Strength (20°C)	Mpa	300	330
Compressive Strength (20°C)	Mpa	2000	2000
Modulus of Elasticity (20°C)	Gpa	275
Poisson's Ratio (20°C)		0.22-0.23
Fracture Toughness (20°C)	MPam1/2	3.5	4
Thermal Properties
Thermal Conductivity (20°C-400°C)	W(m.K)	25	27.5
Thermal Expansion Coefficient	10-6/°C	6.5-7.5	7.6
Thermal Shock Resistance	T°C	200	200
Maximum Use Temperature	°C	1600	1650
Electronic Properties
Dielectric Strength	KV/mm	>12	>10
Dielectric Constant	Er	9-10	9.1
Dielectric Loss Angle (1MHz)		0.0002	0.0002-0.0003
Volume Resistivity (20°C)	Ω.cm	>1014	>1014

Application Industry: Machinery, fiber optic, knife, medical, food, petroleum etc.

Specific Application: Plunger, ceramic shaft, fiber optic bushing, stub, grinding, ceramic knife, ceramic slide guide, machined plunger, mobile phone shell, watch case, haircut razor blade etc.

Product Details: