99 Alumina Ceramic Performance |
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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 99% alumina ceramic components include shafts, pistons, bearings and matching end seals, which are mainly used in chemical and physical conditions and are excellent corrosive media. These 99% alumina ceramic components can be used in the manufacture of circulating pumps, reciprocating pump harmony vibrator supported products. |
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99% alumina properties
99% alumina ceramic 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.
99% alumina ceramic 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
99% alumina ceramic 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 99% alumina ceramic are generally white, but sometimes pink (88% alumina) or brown (96% alumina).Color is an impurity from an additive or ingredient.
99% alumina ceramic thermal performance |
Strong bending strength 99% alumina ceramic |
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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 |
99.0% alumina
0.7% silicon oxide
0.07% magnesia
0.07% iron oxide
0.05% sodium oxide
0.03% calcium oxide
| 99% alumina ceramic 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 |
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 99% alumina ceramic
– 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 99% alumina ceramic,please contact our engineers in time >>> |
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