Solid Boron Nitride

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Precision Ceramics

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Solid Boron Nitride - Grade A

Key Services & Products

Solid Boron Nitride - Grade A

An excellent choice for all but the most severe refractory applications, Solid Boron Nitride Grade A is a high performance material possessing a glassy B₂O₃ binder that creates a hard and dense yet fully machinable product.

Applications

	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
	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
	Setterplates for the processing of other advanced materials which require stable, inert surfaces
	Nozzles for powdered metal spraying

Typical Properties
Binder	Boric Acid
Binder Melting Point	550°C
Maximum Use Temperature
Oxidizing vs. Inert	850°C (1800°C)
Specific Heat @ 700° C (J/g°C): Dieletric Strength (V/mil): Hardness-Knoop (kg/mm²)	1.610 2400 15.51 - 24.19
Pressing Direction (Para (Perp)
Resistivity Ohm-cm RT: Loss Tangent @ 8.8 GHz: Dieletric Contant @ RT	>10¹⁴(>10¹⁵) .0017 (.0005) 4.58 (4.15)
Thermal Conductivity
(W/m/K) @ 25°C:	30.13 (33.71)
Thermal Expansion Coefficient
(RT to 1500°C) (in/in/°C x 10^-6)	11.85 (3.12)
Flexural Strength (psi)*
@ 25°C: @ 1500°C:	11000 (16400) 900 (1380)
Compressive Strength
@ 25°C:	20780 (27060)
Density (g/cc minimum) % Open Porosity Oxygen - max.: B2O3 - max.: Calcium - max.: Other Impurities - max.:	2.00 2.84% 4.0% 4.5% 0.1% 0.2%