Beryllium oxide is an inorganic compound with the chemical formula
BeO. It is amphoteric. It can react with acid and strong alkali. It
is a white powder. It is mainly used in the manufacture of
beryllium oxide, ceramics, glass, and can also be used for nuclear
reactions. It can also be used as an organic reaction catalyst.
Properties of beryllium oxide ceramics；
| Measured Performance Parameters |
| Property | B-99 | B-99.5 |
| Dielectric Constant(1M HZ) | 6.7±0.2(1MHz ) | 6.7±0.2(1MHz ) |
| 6.9±0.2(10GHz ) | 6.8±0.2(10GHz ) |
| Dielectric Loss Tangent | ≤4x10-4(1MHz) | ≤4×10-4(1MHz) |
| ≤6x10-4((10±0.5)GHz) | ≤4x10-4( (10±0.5 )GHz) |
| Volume Resistivity | ≥1014Ω·cm ( 100℃) | ≥1014Ω·cm( 20℃) |
| Breakdown Strength | ≥30kV/mm | ≥40kV/mm |
| Flexural Strength | ≥200MPa | ≥200MPa |
| Bulk Density | ≥2.85g/cm3 | ≥2.88g/cm3 |
| Average Linear Expansion Coefficient | 7.0~8.0x10-61/K
( 25℃~500℃) | 7.0~8.0×10-61/K
(25℃~500℃) |
| Coefficient of Thermal Conductivity | ≥260W/(m.K) (25℃) | ≥285W/(m·K)(25℃) |
| ≥190W/(m·K)( 100℃) | ≥200W/( m·K)(100℃) |
| Thermal Shock Resistance | Passed the test | Passed the test |
| Chemical Stability | ≤0.1mg/cm2( 1:9HCI) | ≤o.1mg/cm2(1:9HCI) |
| ≤0.1mg/cm2(10%NaOH) | ≤0.1mg/cm2(10%NaOH ) |
| Gas Tightness | ≤5×10-12pa.m3/s | ≤5×10-12pa.m3/s |
| Average Grain Size | 10~20μm | 10~20μm |
Applications:
It is mainly used in the manufacture of beryllium oxide, ceramics,
glass, and can also be used as fuel and moderator for nuclear
reactors, and as a catalyst for organic reactions.
Features:
Beryllium oxide ceramics have a high melting point and thermal
shock resistance. Its thermal conductivity is similar to that of
copper and silver, and it also has excellent electrical insulation
properties. At room temperature, its thermal conductivity is about
twenty times that of alumina ceramics. The heating of electronic
products is the key to the service life and quality of the device,
and beryllium oxide ceramics, because of its ideal thermal
conductivity, can be used to improve the service life and quality
of the device, which is conducive to the development of the device
to miniaturization and increase the power of the device. Therefore,
it can be widely used in aerospace, nuclear power, metallurgical
engineering, electronics industry, rocket manufacturing, etc.
Regarding the toxicity of beryllium oxide, it refers to the
toxicity of soluble beryllium oxide. For us, beryllium oxide
ceramics are sintered at 1650~1700°C to make a porcelain material,
which is insoluble in acid and alkali. Therefore, beryllium oxide
ceramics aren't poisonous.
