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Rulon Bearings

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China-Yixing Longly Refractories 99 Alumina Ceramic
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: LONGLY selects high quality ceramic fine powder and micropowder as materials, adopts modern advanced molding technology to produce a multitude of ceramic tubes, rods, beads, balls, columns, plates, films and other forms. These ceramic products sintered in high temperature has a large elastic modulus, high mechanical strength, high oxidation resistance at elevated temperatures, excellent thermal conductivity, good electrical insulation, high electric strength, low dielectric loss, stability of electric properties with temperature and frequency variation, high wear-resistance, good corrosion resistance, superior waterproof under temperature mutation and surface machinability. Many of alumina's extinguished properties could be strengthened through variation in manufacturing methods and in chemistry.

Applications: Widely used in electronics, electrical appliances, machinery, petroleum, chemical, medical, textile, automobile, metallurgy and aerospace industries and so on.

Information Provided by China Yixing Longly Refractories Co. Ltd

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Physical PropertiesOriginal ValueComments
Density 3.80 - 3.95 g/cc
Water Absorption <= 0.0060 %
 
Mechanical PropertiesOriginal ValueComments
Hardness, Mohs 9.0
Flexural Strength >= 580 MPacold bending
Compressive Strength >= 560 MPaAmbient
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+16 ohm-cm
@Temperature 100 °C
Dielectric Strength 15.0 - 16.0 kV/mmDC Breakdown Strength
 18.0 kV/mmInsulating Strength
 
Thermal PropertiesOriginal ValueComments
CTE, linear 7.60 - 8.50 µm/m-°C
@Temperature 25.0 - 800 °C
Thermal Conductivity 35.0 W/m-K
Maximum Service Temperature, Air >= 1600 °C
 
Component Elements PropertiesOriginal ValueComments
Al2O3 98 - 99.5 %
 
Descriptive Properties
Refractoriness (°C)>2030

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Alumina, alpha Al2O3, 99.5%

CYXLR017 / 99319

Aluminum Castings

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