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| Application: | Industrial Ceramic, Power Electronics Industries |
| Material: | Alumina Ceramic |
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Beryllia ceramics/Beryllium oxide ceramics
Beryllium oxide ceramics are ceramics with beryllium oxide as the main component. Mainly used as a substrate for large-scale integrated circuits, high-power gas laser tubes, heat sink shells for transistors, microwave output windows and neutron moderators.
Characteristics of beryllium oxide ceramics
Pure beryllium oxide (BeO) belongs to the cubic crystal system, and its density is 3.03g/cm3. The melting point is 2570ºC, it has high thermal conductivity, the thermal conductivity λ is 200-250W/(m.K), and it has good thermal shock resistance. Beryllium oxide ceramics are made of beryllium oxide powder as raw material, alumina and other ingredients are added and sintered at high temperature.
The melting temperature range of beryllium oxide is 2530ºC~2570ºC, and its theoretical density is 3.02g/cm3. It can be used for a long time at 1800ºC in vacuum, 2000ºC in inert gas, and 1800ºC in oxidizing atmosphere. ºC to volatilize. The most outstanding performance of beryllium oxide ceramics is its large thermal conductivity, which is similar to that of metal aluminum and 6 to 10 times that of aluminum oxide. It is a dielectric material with unique electrical, thermal and mechanical properties.
Application of beryllium oxide ceramics
Beryllium oxide ceramics are widely used in microwave technology, electric vacuum technology, nuclear technology, microelectronics because of its high thermal conductivity, high melting point, strength, high insulation, low dielectric constant, low dielectric loss and good packaging process adaptability. It has been valued and applied in the field of optoelectronic technology, especially in high-power semiconductor devices, high-power integrated circuits, high-power microwave vacuum devices and nuclear reactors. It has always been the mainstream ceramic material for preparing high thermal conductivity components.
Technique Data of Beryllium Oxide Ceramic
| Item | Test Conditions | Specification | Unit | |
| B-97 | B-99 | |||
| Dielectric Constant | 1MHz | 6.90.4 | 6.90.4 | |
| (100.5)GHz | ||||
| Dielectric Loss Tangent | 1MHz | ≤4X 10-4 | ≤4X 10-4 | |
| (100.5)GHz | ≤8X 10-4 | ≤8X 10-4 | ||
| Volume Resistivity | 25ºC | ≥1014 | ≥1014 | Ω.cm |
| 300ºC | ≥10" | ≥10" | ||
| Breakdown Strength | D C | ≥15 | ≥20 | kV/mm |
| CMOR | - | ≥170 | ≥190 | MPa |
| Average Linear Expansion Coefficient | 25ºC~500ºC | (7.0~8.5)*10-4 | (7.0~8.5)*10-4 | I/K |
| Thermal Conductivity | 25ºC | ≥200 | ≥240 | W/m.K |
| 100ºC | ≥160 | ≥190 | ||
| Thermal Shock Resistance | 0ºC-800ºC | There should be no cracks | ||
| Bulk Density | ≥2.85 | ≥2.85 | g/ cm3 | |
| Chemical Stability | 1:9HCL | ≤0.3 | ≤0.3 | Mg/cm2 |
| 10% NaOH | ≤0.2 | ≤0.2 | ||
| Air Tightness | - | ≤10*10-11 | ≤10*10-11 | Pa. m3/s |
| Average Grain Size | - | 12~30 | 12~30 | μm |
We mainly produce beryllium oxide, boron nitride, silicon carbide, corundum mullite ceramic, A-75 ceramic, A-95 ceramic, A-96 ceramic, A-99 ceramic and other ceramic products, which are widely used in aerospace, microelectronics, optoelectronics, communications, electric vacuum and power electronics industries, among which the production technology of beryllium oxide ceramics represents the highest level in China, and the product performance indexes reach the world advanced level.
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