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Boron Nitride

Material Information

Specifications

Physical PropertiesMetricEnglishComments
Density1.95 g/cc0.0704 lb/in³Typical
Water Absorption0.0060.006400 Hours, 100% RH
Open Porosity0.130.13
ColorWhite
Mechanical PropertiesMetricEnglishComments
Hardness, Knoop 1616100 g
Modulus of Elasticity20.6 GPa2990 ksiPerpendicular to pressing direction
Modulus of Elasticity48.2 GPa6990 ksiParallel to pressing direction
Flexural Strength17.2 MPa2490 psiPerpendicular to pressing direction
Flexural Strength20.6 MPa2990 psiParallel to pressing direction
Compressive Yield Strength41.3 MPa5990 psiParallel to pressing direction
Compressive Yield Strength51.7 MPa7500 psiPerpendicular to pressing direction
Electrical PropertiesMetricEnglishComments
Electrical ResistivityMin 1e+015 ohm-cmMin 1e+015 ohm-cm
Dielectric Constant4.14.11 MHz
Dielectric Strength54 kV/mm1370 kV/in
Dissipation FactorMax 0.0002Max 0.0002At 1 MHz
Thermal PropertiesMetricEnglishComments
CTE, Linear 1000°C 0.4 μm/m-°C0.222 μin/in-°F25-1500ºC. Perpendicular to pressing direction
CTE, Linear 1000°C 0.8 μm/m-°C0.444 μin/in-°F25-1500ºC. Parallel to pressing direction
Heat Capacity0.808 J/g-°C0.193 BTU/lb-°FValue at 700°C is 1.846 J/g-K
Thermal Conductivity23 W/m-K160 BTU-in/hr-ft2-°FPerpendicular to pressing direction
Thermal Conductivity28 W/m-K194 BTU-in/hr-ft2-°FParallel to pressing direction
Max Service Temperature, Air850 °C1560 °FOxidizing Atmosphere
Max Service Temperature, Inert2000-3000 °C3630-5430 °FInert/Vacuum

NOTE: The information in this data sheet is for design guidance only. Forming methods and specific geometry could affect properties.

Overview

Hot-pressed BN is compacted at temperatures up to 2000°C and pressures up to 2000 psi to form a dense, strong engineering material that is easily machined. It is available in standard and custom hot-pressed shapes and has several unique characteristics and physical properties which make it valuable for solving tough problems in a wide range of industrial applications. This information is provided by Momentive Performance Materials.

There are four material grades of Boron Nitride with HBC and HBT being the highest purity hot-pressed boron nitrides commercially available. They are diffusion bonded and feature a low dielectric constant, minimal moisture pick-up, and low loss tangent which makes them ideal for electronic applications. Grade HBT, although lower in strength and density than HBC, is available in larger sizes, at lower cost, and usually with a shorter delivery schedule. Grade HBN uses small amounts of boric oxide as a binder and should be used in applications where hydration and thermal shock are not a concern. Grade HBR uses calcium borate as a binder and is less sensitive to moisture.

Thermal Management: The unique combination of being both an excellent electrical insulator and thermal conductor makes BN very useful as a heat sink in high power electronic applications. Its properties compare favorably with beryllium-oxide, aluminum-oxide and other electronic packaging materials, yet is easier to form and finish.

High Temperature Applications: Temperature stability and excellent resistance to thermal shock makes BN the material of choice in the toughest high temperature applications such as equipment for plasma arc welding, diffusion source wafers, and semiconductor crystal growth equipment & processing.

Molten Metal Handling: BN is inorganic, inert, non-reactive with halide salts and reagents, and is not wet by most molten metals and slags. These characteristics, combined with low thermal expansion, make it ideal for interface materials used in various molten metal processes.

Applications & Usage

  • Filament Insulators
  • Vaporizer Tubes
  • Cathode Repellers
  • Clamp Isolators
  • Thermocouple Protection Sheaths
  • Reaction Vessel Liners
  • Electronic parts such as substrates, coil forms, heat sinks and prototypes
  • Microwave Tubes
  • Low Friction Seals
  • High temperature furnace fixtures and supports
  • Microcircuit Packaging

Industries Using This Material

Semiconductor

One of the original second source providers, Glemco has been manufacturing products in the US in support of the semiconductor industry for over 40 years. Our extensive history means that we can support the oldest legacy equipment or the newest cutting-edge implant technology, with available upgrades and enhancements to drive efficiency, reliability and performance improvements.

Semiconductor

One of the original second source providers, Glemco has been manufacturing products in the US in support of the semiconductor industry for over 40 years. Our extensive history means that we can support the oldest legacy equipment or the newest cutting-edge implant technology, with available upgrades and enhancements to drive efficiency, reliability and performance improvements.
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Aerospace

Our well-equipped shop excels in the types of high precision components with complex geometries that the Aerospace industry needs, ensuring product that meets specification and is on time and within budget.

Aerospace

Our well-equipped shop excels in the types of high precision components with complex geometries that the Aerospace industry needs, ensuring product that meets specification and is on time and within budget.

Energy

CNC machining technology has always been crucial in creating the complex devices that drive our energy industry. Advanced machining techniques are used to achieve the level of quality and efficiency needed to support today’s complex and varied methods of power generation.

Energy

CNC machining technology has always been crucial in creating the complex devices that drive our energy industry. Advanced machining techniques are used to achieve the level of quality and efficiency needed to support today’s complex and varied methods of power generation.
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Measurement & Inspection Equipment

Milling Machinery

Positional and dynamic 5 axis machining centers, up to x= 60” y= 26” z= 24”
High speed drilling and tapping centers, up to x=24” y=15.75” z=24”
Vertical machining centers, up to x=24” y=12” z=12”

Turning Tools

2 axis, max diameter 9”, max thru spindle diameter 2”, Max length 22”
4 axis with live tooling, max diameter 14”, max thru spindle diameter 3”, Max length 24”
5 axis with live tooling, max diameter 9”, max thru spindle diameter 2.6”, Max length 4.7”

Wire EDMs

Max part size x=41” y= 32.25” z= 11.75”
Max cutting capacity x=23.5” y= 15.5” z= 12”

CNC Sheet Metal Forming Machinery

Precision 36 ton, 6 axis control press brake, 48” length, 4” stroke, 10” throat depth

Versatility & Support Tools

Mills and lathes
Surface grinders
Hydraulic presses
Sheet metal shears
Horizontal and vertical band saws
Indexers/Rotary tables
Kilns
Blue M Ovens

National Women Business Owners Corporation Certified

Glemco has met all necessary criteria for NWBOC certification. Liana Merriman is the controlling business owner and is the final decision maker to employees, supervisors and managers. Her control spans all management of the business including sales, production and financial operations. Partners, vendors and suppliers can be confident that Glemco is indeed a woman owned company. View our NWBOC Certificate.

Proud To Be An ISO 9001: 2015 Certified Company

Glemco appreciates that the customer is our business. We embrace ISO as a management tool, and believe that only by embracing the concepts of Total Quality Management can we best service our customers. Glemco is committed to total customer satisfaction, achieved through innovative solutions to our customer’s needs. We strive to offer the highest quality product with continual improvement of manufacturing processes, service, and delivery. View our ISO 9001: 2015 Certificate.