ACI-998 Alumina

WEIGHT 99.8% ALUMINUM OXIDE (ACI-998)

ACI-998 ALUMINA

ACI-998 ALUMINA is the most popular technical alumina ceramic for ACI’s customers in various industries. Highly due to its high electrical insulation property, sound mechanical performance and excellent corrosion resistance, ACI-998 AlO has been applied in many industries that include semiconductor, automotive, oil and gas energy, medical and health, military defense and armor industries.
With over 20 years of experience in the fine ceramic & alumina ceramic manufacturing business, ACI produces this state-of-art technical machinable ceramic alumina from ultra-pure raw powder for ultra-precision parts.

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APPLICATIONS

Semiconductor
Automotive
Oil & Gas Energy
Medical & Health
Military Defense & Armor

MAIN PROPERTIES

Molecular Formula: AlO
High Electrical Insulation
Sound Mechanical Performance
Excellent Corrosion Resistance

ACI-998 Alumina

Properties

Units

ACI-998 Alumina (weight 99.8% Aluminum Oxide)

99.5% Aluminum Oxide

MECHANICAL

Density	gram/cm³	3.9	3.8-3.9
Color	–	ivory	ivory/white
Water Absorption	%	0	0
Flexural Strength	MPa@room temp.(R.T.)	400	310-379
Compressive Strength	MPa@R.T.	3180	2070-2620
Hardness	GPa	14.0-15.0	13.8-17.6

THERMAL

Coefficient of Linear Thermal Expansion	1E-6/°C (>>25°C to 1000°C)	8.0	9.0-9.4
Thermal Conductivity	W/m°K@R.T.	29.5	25.1-35.6
Specific Heat	cal/g°C@R.T.	0.21	0.19-0.21
Thermal Shock Resistance	D T(°C)	250	200
Maximum Use Temperature	°C	1800	1600-1750

ELECTRICAL

Volume Resistivity	Ohm. cm@R.T.	>10¹⁴	>10¹⁴
Dielectric Constant	1MHz@R.T.	9.8	9.6-10.2