Metal Injection Molding Of Ceramics
95 alumina ceramics, porcelain refers to ceramic materials containing 95% alumina. 95 alumina ceramics have the characteristics of high temperature resistance, corrosion resistance, wear resistance, high mechanical strength, and high thermal conductivity.
95 alumina porcelain is one of the most commonly used ceramics in structural ceramics. Because alumina ceramics have excellent electrical properties at high frequencies, they have low dielectric loss, high volume resistivity, high strength, high hardness, small linear expansion coefficient, and particularly good wear resistance and heat resistance.
95% alumina porcelain, widely used in radio, electronic components, textile ceramics, ball mill lining, ball stone base sandblasting nozzle and argon arc welding torch nozzle, etc.
99 alumina ceramics, porcelain refers to ceramic materials containing 99% alumina widely used in environments with high-cleanliness, high-temperature, and high-wear-resistant environments. They are used to make high-temperature crucibles, refractory furnace tubes, and special wear-resistant materials, such as ceramic bearings, ceramic seals, and water valves.
Performance parameters of alumina zirconia ceramics
| Alumina Ceramics ( AL 2 O 3 ) | Zirconia Ceramics ( Zr0 2 ) | ||||||
| performance | unit | ≥ 95 | ≥ 99 | ≥ 99.5 | ≥ 99.8 | ZTA | YIZ |
| Bulk density | g/ cm3 | 3.7 | 3.8-3.85 | 3.85 | 3.85 | 3.8-4.6 | 6 |
| hardness | MPa ≥ | 86 | 88 | 88 | 88 | 86-88 | 88-90 |
| Bending strength | HRA≥ _ | 300 | 350 | 400 | 400 | 172-450 | 900 |
| Maximum operating temperature | ℃ | 1500 | 1500 | 1500 | 1500 | 1400-1500 | 1500 |
| Linear expansion coefficient | × 10-6/ ℃ | 7.5 | 8.2 | 8.2 | 8.2 | ||
| Dielectric constant | εr (20 ℃ ,1MHz) | 9.0 | 9.2 | 9.2 | 9.2 | ||
| Dielectric loss | tanδ×10-4,1MHz | 3 | 2 | 2 | 2 | ||
| volume resistivity | Ω• cm(20 ℃ ) | 10 13 | 10 14 | 10 14 | 10 14 | 10 13 | 10 14 |
| Breakdown strength | KV/mm, DC ≥ | 20 | 20 | 20 | 20 | ||
| acid resistance | mg/cm2 ≤ | 0.7 | 0.7 | 0.7 | 0.7 | ||
| Alkali resistance | mg/cm2 ≤ | 0.2 | 0.1 | 0.1 | 0.1 | ||
| wear resistance | g/cm2 ≤ | 0.2 | 0.1 | 0.1 | 0.1 | ||
| Compressive strength | MPa ≥ | 2500 | 2500 | 2500 | 2800 | 2300-2900 | 2500 |
| Flexural strength | MPa ≥ | 200 | 350 | 350 | 350 | ||
| Elastic Modulus | Gpa | 300 | 350 | 350 | 350 | ||
| Poisson’s ratio ( transverse deformation coefficient ) | 0.2 | 0.22 | 0.22 | 0.22 | |||
| Thermal Conductivity | W/m • K(20 ℃ ) | 20 | 25 | 25 | 25 | 13-27 | twenty two |
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