PBN
( Pyrolytic Boron Nitride )
Products Summary
PBN is a particular material of ceramics. its sedimentary process
just like "Snowing" hexagon shaped PBN by dropping on graphite
material in parallel till to a certain thickness. After cooling, it becomes.
Main Features
- · The product is white, non-toxic, non-porous and easy-marking.
- · The purity is up to 99.99% and its surface is very compact.
- · It has good hermeticity and high temperature resistance. Its intensity increases woth temperature and maximise at 2200℃
- · It has many good properties such as acid-resistance, alkali-resistance, salt-resistance and reagent-organic-resistance. It is insoluble and nonreactive with most molten-metals , semiconductors etc. under high temperature.
- · It has good thermal shock resistance and good conductivity. It has low coefficient of thermal expansion.
- · It has high resistance, high dielectric-strength and low dielectric-constant. It has low magnetic loss tangent. It has good performance to allow microwave and infrared ray to pass through.
- · It has distinct differences among mechanics performance, thermotics performance and electricity performance
PBN Products
- · Crucibles
- · Machined plate products
- · Tube
- · Bottles
- · Etc
PBN Products’ Usage
- · Crucibles, Foundation bed of compounding semiconductor monocrystal and III-V synthetic materia
- · LEC crucibles of GaAs monocrystal Inp monocrystal and GaP monoctystal in sity synthesis
- · MBE crucibles for molecular beam epitaxy
- · VGF crucible and VB crucibles
- · Coating of PBN/PG composite heater
- · Insulation coating of graphite heater
- · Spray nozzle for high temperature insulation fluid
- · MOCVD insulation Board
- · Special-shaped crucibles and Coating of special- shaped graphite product
- · Composite heater for chip annealing process
PBN Materiel property
| Property | Unit | Date | |
| Apparent Density | g/㎤ | Board | 2.0 -2.19 |
| Crucible | 2.0 -2.19 | ||
| Tensile Strength | N/mm² | II | 153.86 |
| Bending Strength | N/mm² | II | 243.63 |
| ┴ | 197.76 | ||
| Thermal Conductivity | W/m-k (200℃) | ab | 60 |
| c | 2.6 | ||
| W/m-k (900℃) | ab | 43.7 | |
| c | 2.8 | ||
| Lattice Constant | µm | a | 2.504*10-10 |
| c | 6.692*10-10 | ||
| Helium Transmissivity | ㎤/s | 1*10-10 | |
| Hardness (Knoop) (ab plane) solidity by microscope | N/mm² | 691.88 |
| Volume Resistivity | Ω · cm | 3.11*1011 |
| Elasticity Modulus | N/mm² | 235690 |
| Purity | % | 99.95-99.995 |
Metal impurity table
| Element | Concentration (ppm wt) |
| Li | < 0.01 |
| Na | < 0.22 |
| Mg | < 0.12 |
| A1 | < 0.1 |
| K | < 0.5 |
| Ca | < 0.44 |
| Ti | < 0.05 |
| Cr | < 0.05 |
| Mn | < 0.05 |
| Fe | < 0.18 |
| Co | < 0.01 |
| Ni | < 0.01 |
| Cu | < 0.05 |
| Zn | < 0.05 |
| Pb | < 0.05 |
- Testing Agency : EAG
- Detection Method : GDMS
