Solid Boron Nitride - Grades M & M26

Requires a Java Enabled Browser.

Come and meet

Precision Ceramics

on our stand at

CERAMITEC 2009

New Munich Trade Fair Centre

20th to 23rd October 2009

MACOR^®

Machinable Glass Ceramic

Machinable with ordinary metalworking tools & combining the performance of a technical ceramic with the versatility of a high performance plastic.

A completely unique material, Solid Boron Nitride solves problems that could not possibly be tackled with other compositions such as Al₂O₃ or SiC.

Solid Boron Nitride fights off temperatures over 2,000°C and, depending on the grade, carries a dielectric strength of nearly 1000 volts/mil. Hot pressed in billet form, Solid Boron Nitride can easily be machined into rods, bars, plates and even custom shapes.

The highly exceptional characteristics of Solid Boron Nitride make it ideal for fixture or jig materials for sealing or brazing operations in induction, vacuum and atmosphere furnaces; for molten metal crucibles; heat sinks and high temperature insulators.

Solid Boron Nitride - Grades M & M26

Solid Boron Nitride Grade M is a truly hydrophobic advanced ceramic. Composed of boron nitride and silica, it is completely resistant to moisture and has a MIL-I-10A grade of L542, a test requiring immersion in water for 48 hours prior to testing at elevated frequencies. Grade M is suitable for the most severe electrical applications. It is an excellent refractory material at temperatures up to 1400°C, and is unparalleled in resistance to thermal shock.

Applications

High temperature electrical insulators and vacuum furnace supports which require electrical resistivity, high temperature strength, thermal shock resistance and low chemical resistivity
Crucibles and containers for high purity molten metals
Tools and refractories for glass forming which provide non-wetting, non-B₂O₃ containing contacts
Radar components and antenna windows which require exacting electrical and thermal properties

Typical Properties

Typical Chemical Analysis	Grade M	Grade M26
Boron¹	18-20.25%	26.5-28.7%
Nitrogen ¹	22.5-25.5%	32.8-35%
Oxygen²	-	-
Calcium¹	.01%³	.01%³
Silica (SiO₂)¹	60%	40%¹
Other Inorganic¹	.02%	.05%
Trace Metals	.05%	.05%
TOTAL	100%	100%
B₂O₃*	.2%	.2%

*B₂O₃ is given for clarification and is not part of the elemental analysis

¹ Wet Chemistry - ² LECO Oxygen - ³ Optical Emission Spectroscopy

Typical Physical Properties

Typical Physical Properties	Grade M	Grade M26
Percent BN:	40	60
Percent SiO₂:	60	40
	Parallel Perpendicular	Parallel Perpendicular
Volume Resistivity (ohm-cm) @ RT: @150°C:	1.7 x 10¹⁵ 5.1 x 10¹⁵2.4 x 10¹³ 3.3 x 10¹³	6.4 x 10¹⁴ 2.9 x 10¹⁵2.4 x 10¹³ 8.5 x 10¹³
Dielectric Constant (@ IMHz) @RT: microware frequency: @ RT, 8.8 GHz:	4.21 3.87 3.86 4.08	4.48 3.89 3.89 4.28
Dieletric Strength: volts/mil & (volts/mm)
Sample thickness: 10 mil. Tested up to 25kV) 25 mil	1670 (65748) >1000 (>39370)	1690 (66535) >1000 (39370)
Dissipation Factor (Loss tangent)
@RT @ 1 MHz @150°C @ 1 MHz @RT @ 8.8 GHz	.0016 .0035 .0017 .0055 .0011 .0005	.0017 .0061 .0094 .0062 .0039 .0006
Loss Factor @RT @ 1 MHz @150°C @ 1 MHz @RT @ 8.8 GHz	.0067 .0140 .0077 .0230 .0042 .0020	.0076 .0230 .0440 .0250 .0150 .0260
Surface Resistivity (ohms/ )@ RT @150°C	8.5 x 10¹⁶ 1.4 x 10¹⁵	4.2 x 10¹⁶ 1.5 x 10¹⁵

Solid Boron Nitride - Grade A

Solid Boron Nitride - Grade AX05

Solid Boron Nitride - Grade HP

Solid Boron Nitride - Grades M & M26

Solid Boron Nitride - Grade ZSBN

Boron Nitride Coatings

Boron Nitride Industrial Powders

Boron Nitride Aerosol Sprays