Precision Ceramics USA
Total Ceramic Solutions for the 21st Century
511
West Bay Street, Suite 350, Tampa, FL 33
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Boron nitride components engineered by Precision Ceramics USA are ideal for high temperature runner systems in hot metal casting |
When higher thermal shock, more spall resistance and lower permanent expansion upon heating is required, Solid Boron Nitride Grade HP is a superior solid grade for formulations of <1,000°C. Additionally, Grade HP has ten times the moisture resistance of Grade A due to the addition of calcium which combines with boric oxide to form calcium borate. Commonly used for many light metal applications such as Al, Ti, Mg and Zn.
Key Properties
Chemically - High corrosion
resistance due to the addition of boron nitride; ten times the
moisture resistance of other boron nitride solids due to the
addition of calcium which combines with boric oxide to form
calcium borate.
Thermally - Excellent
thermal shock resistance and conductivity - commonly used in many
light metal applications such as Al, Ti, Mg, and Zn.
Electrically - Low dielectric constant material -
also commonly used in many high temperature insulators.
Machinability - Like other grades of Boron
Nitride, Grade HP can be machined using standard high speed 'tool
steel' equipment. Machining by grinding may be used if preferred
or stringent tolerances are required.
Applications
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High temperature electrical insulators and vacuum furnace supports which require electrical resistivity, high temperature strength, thermal shock resistance and low chemical reactivity.
-
Crucibles and containers for high purity molten metals.
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Insulators and source fixtures for ion implantation systems which require high temperature purity and electrical insulation.
-
Radar components and antenna windows which require exacting electrical and thermal properties.
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Setterplates for the processing of other advanced materials which require stable, inert surfaces.
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Nozzles for powdered metal spraying.
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Typical Properties |
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| Binder: | Boric Acid |
| Binder Melting Point: | 550°C |
| Maximum Use Temperature: | |
| Oxidizing vs. (Inert): | 850°C(1150°C*) |
| Specific Heat @ 700°C (J/g°C):1.468 | . |
| Dielectric Strength (V/mil): | 1700 |
| Hardness-Knoop (kg/mm2) | 13.79-18.95 |
| Pressing Direction: (Para (Perp) | |
| Resistivity Ohm-cm RT: | >1014 (>1015) |
| Loss Tangent @ 8.8 GHz: | .0014 (.0007) |
| Dielectric Constant @ RT: | 4.30 (4.02) |
| Thermal Conductivity | |
| (W/m/K) @ 25°C: | 27.0 (29.0) |
| Thermal Expansion Coefficient | |
| (RT to 1500°C) (in/in/°C x 10-6) | 2.95 (0.87) |
| Flexural Strength (psi)* | |
| @ 25°C : | 6430 (8730) |
| @ 1500°C: | 1710 (2470) |
| Compressive Strength | |
| @ 25°C: | 4370 (6460) |
| Density (g/cc minimum): | 2.0 |
| Open Porosity (%): | 3 |
| Oxygen (%): | 5 |
| B2O3 (%): | 1 |
| Calcium (%): | 2.5 |
| Other Impurities (%): | 0.2 |
*Based on 4-pt bend test-Sample size = 51mm x 4mm x 3mm
Please click on one of the links below, to view further information on our Boron Nitride product range.
Boron Nitride - General Information
Solid Boron Nitride - Grade AX05
Solid Boron Nitride - Grades M & M26
Solid Boron Nitride - Grade ZSBN
Precision Ceramics
USA Inc, 511 West Bay Street, Suite 350, Tampa, FL 33
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