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99 Alumina ceramic
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99 Alumina Ceramic Performance

   
99 alumina ceramic materials are often used in chemical and physical grinding environments, especially high purity alumina, which is a very good material used to produce wear-resistant components.

These components include shafts, pistons, bearings and matching end seals, which are mainly used in chemical and physical conditions and are excellent corrosive media.

These components can be used in the manufacture of circulating pumps, reciprocating pump harmony vibrator supported products.
 

99% alumina properties
Alumina has a high melting point, high hardness and high mechanical strength, while the mechanical strength reduced to more than 1000 ° C temperature.Due to the increase of relatively large coefficient of thermal expansion, the thermal shock stability is reduced. 

Alumina is an electrical insulating material with high resistivity.It also has good chemical stability of alumina, so good corrosion resistance.Alumina is insoluble in water, only slightly soluble in strong acid and alkaline water solutions. 

99% of alumina applications
Alumina is the most mature engineering ceramics that provides excellent electrical insulation, high hardness and wear resistance but relatively low strength and fracture toughness. 
Different types of alumina are generally white, but sometimes pink (88% alumina) or brown (96% alumina).Color is an impurity from an additive or ingredient. 

99% alumina thermal performance

 

Strong bending strength

High compressive strength
Bulk density open porosity 20 ° C 1000 ° C 20 ° C
3.83 g/cm3 0% 345 Mpa 145 Mpa 2550 Mpa
239 lbs/ft3 0% 50 ksi 30 ksi 370 ksi
 
Conductive expansion coefficient 20 ° C 800 ° C 20-1000 ° C
29 W/m°K 7.2 W/m°K 8.4 x 10-6/C°
201 BTU.in/ft2.hr°F 50 BTU.in/ft2.hr°F 4.7 x 10-6/F°
Maximum operating temperature ° (no load) 1700 ° C 3092 ° F
AP35 99% alumina
99% Alumina Ingredients 
99.0% alumina
0.7% silicon oxide
0.07% magnesia
0.07% iron oxide
0.05% sodium oxide
0.03% calcium oxide


Mechanical properties unit measurement
Density gm/cc (lb/ft3) 3.89
Porosity % (%) 0
colour cream color
Bending strength MPa (lb/in2x103) 379
Elastic coefficient GPa (lb/in2x106) 375
Shear modulus GPa (lb/in2x106) 152
Bulk modulus GPa (lb/in2x106) 228
Poisson's ratio 0.22
Compressive strength MPa (lb/in2x103) 2600
hardness Kg/mm2 1440
Fracture toughness MPa•m1/2 4
Maximum no-load use temperature °C (°F) 1750
Thermal energy    
Thermal conductivity W/m°K (BTU•in/ft2•hr•°F) 35
Thermal expansion coefficient 10–6/°C (10–6/°F) 8.4
Specific heat J/Kg•°K (Btu/lb•°F) 880
electric    
Dielectric strength ac-kv/mm (volts/mil) 16.9
Capacitance rate @ 1 MHz 9.8
Consumption factor @ 1 kHz 0.0002
Loss factor @ 1 kHz
Volume resistivity ohm•cm >1014 
Mignrui uses ceramic injection molding and precision grinding to produce a wide range of complex components with precise surface finish and tightness requirements. At the same time, mignrui's manufacturing process can also meet the requirements of small quantities and mass production. These components are commonly used in environmental engineering, medical food, automotive military, telecommunications, and home appliance applications. If you are interested in our 99% alumina parts, we would very much welcome you to use high purity alumina, and the high purity alumina we offer will once again show the extremely high hardness and wear resistance of alumina ceramics.

Properties of Alumina/Aluminum Oxide (Al2O3)
1.Very good electrical insulation (1x1014 to 1x1015 Ωcm)
2.Moderate to extremely high mechanical strength (300 to 630 MPa)
3.Very high compressive strength (2,000 to 4,000 MPa)
4.High hardness (15 to 19 GPa)
5.Moderate thermal conductivity (20 to 30 W/mK)
6.High corrosion and wear resistance
7.Good gliding properties
8.Low density (3.75 to 3.9 g/cm3)
9.Operating temperature without mechanical load 1,000 to 1,500°C.
10.Bioinert and food compatible
 
Products and Aplications
– Pieces, Plates, Boards, Trays, etc. in Alumina-Ceramic / Cordierite-Mullite
– Tubes, Rods, Rollers, Supports, etc. in Alumina-Ceramic / Cordierite-Mullite
– Protection, Thermocouples, Insulation, etc. in Alumina-Ceramic / Cordierite-Mullite
– Pieces, Plates, Tubes, Rods, Rollers, etc. in Zirconium Oxide
– others 


For more information about ceramics parts,please contact our engineers in time  >>>       
 
 

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