Boron Nitride Ceramic Insulator For High Temperature Furnace

 High temperature furnace designs contain heating elements made of carbon, tungsten or molybdenum. When the operating temperature of the high temperature furnace is significantly higher than 1500°C, the elements are electrical insulated from the furnace sides using aluminum oxide ceramics.

 

With the development of technology, more and more companies need high temperature electrical furnaces with shorter production cycles and faster heating and cooling speeds. These oxide ceramic insulation parts are easily subject to failure of components due to high pressure, which increases the downtime of the furnace.

 

Compared with traditional aluminum oxide materials, the working life of ceramic components made of hexagonal boron nitride (BN) is much longer. For thermal processes at extremely high temperatures and vacuum or inert conditions, boron nitride ceramics are often the only feasible solution. Boron nitride ceramic material max using temperature in inactive gas atmosphere is 2100°C.

 

In the field of high temperature furnaces, they includes: vacuum furnaces, hot pressing sintering furnaces, hot isostatic furnaces, Innovacera can provide a series of boron nitride precision machined components such as boron nitride sleeves, BN bushings, BN tubes, BN washers, BN insulators, BN insulation plates, BN flanges and other boron nitride ceramic insulator parts subjected to high thermal shock to meet customers’ specific requirements in the high temperature furnaces industry.

 

 

Boron Nitride Material Advantages

 

– 1. High temperature resistance: can maintain stable performance under high temperature environment.

 

– 2. No bonding: no bonding phenomenon, easy to use and handle.

 

– 3. Corrosion resistance: able to resist the erosion of various corrosive media.

 

– 4. Heat dissipation: has good heat dissipation performance.

 

– 5. Thermal conductivity: can effectively conduct heat.

 

– 6. Thermal shock resistance, high electrical breakdown strength (3-4 times that of alumina), carbon atmosphere corrosion resistance is much stronger than alumina.

 

– 7. It does not wet with aluminum water and can protect the surface of materials in direct contact with aluminum liquid, magnesium, zinc alloy, and slag.

 

 

Boron Nitride Material Properties

 

Properties	Unit	UHB	HB	BC	BMS	BMA	BSC	BMZ	BAN	BSN
Main Composition	–	BN>99.7%	BN>99%	BN>97.5%	BN+Al +Si	BN+Zr+Al	BN+SiC	BN+ZrO2	BN+ALN	BN+Si3N4
Color	–	White	White	White	White Graphite	White Graphite	Greyish- Green	White Graphite	Greyish- Green	Gray Black
Density	g/cm3	1.6	2	2.0 ~2.1	2.2 ~2.3	2.25 ~2.35	2.4 ~2.5	2.8 ~2.9	2.8 ~2.9	2.2 ~2.3
Three-Point Bending Strength	MPa	18	35	35	65	65	80	90	90	/
Compressive Strength	MPa	45	85	70	145	145	175	220	220	400 ~500
Thermal Conductivity	W/ (m·k)	35	40	32	35	35	45	30	85	20 ~22
Thermal Expansion Coefficient (20 ~ 1000°C)	10-6/K	1.5	1.8	1.6	2	2	2.8	3.5	2.8	/
Max Using Temperature In Atmosphere In Inactive Gas In High Vacuum (Long Time)	°C	900 2100 1800	900 2100 1800	900 2100 1900	900 1750 1750	900 1750 1750	900 1800 1800	900 1800 1800	900 1750 1750	900 1750 1700
Room Temperature Electric Resistivity	Ω·cm	>1014	>1014	>1013	>1013	>1013	>1012	>1012	>1013	/
Typical Application	–	Nitrides Sintering	High Temperature Furnace	High Temperature Furnace	Powder Metallurgy	Powder Metallurgy	Powder Metallurgy	Metal Casting	Powder Metallurgy	Metal Casting
High Temperature Electrical Furnace Components	–	–	✓	✓	✓	✓	✓	✓	✓	✓
Metal Vaporize Crucible			✓	✓					✓	✓
The Container of Metal or Glass Melting	–	✓	✓	✓	✓	✓	✓	✓	✓	✓
The Casting Mould Components of The Precious Metal and Special Alloy.	–	–	–	✓	–	✓	–	–	✓	✓
High Temperature Support Part	–	–	–	–	–	✓	–	✓	✓	✓
Nozzle and Transport Tube of The Melting Metal	–	–	✓	✓	✓	✓	✓	✓	✓	✓
Nitrides Sintering (Sagger and Setter Plate)	–	✓	–	–	–	–	–	–	–	–

 

Remark: The valueisjustfor review, differentusing conditions wilhave alittle difference.

 

Advanced Machining Processes

INNOVACERA offers professional customized production of boron nitride with qualified quality. It ensures fast delivery within 15 to 30 days and can process a wide range. The largest BN block of high-purity boron nitride: 500*500mm.

 

 

Innovacera Boron Nitride Material Types:

 

– Pyrolytic Boron Nitride: 99.99% Boron Nitride*

 

– UHB: >99.7% Boron Nitride

 

– HB: >99% Boron Nitride

 

– BC: >97.5% Boron Nitride

 

– BAN: Boron Nitride + Aluminum Nitride

 

– BMZ: Boron Nitride + Zirconium Oxide

 

– BMA: Boron Nitride + Zirconium Oxide + Aluminum Oxide

 

– BSC: Boron Nitride + Silicon Carbide

 

– BMS: Boron Nitride +Silicon Oxide+Aluminum Oxide

 

– BSN: Boron Nitride + Silicon Nitride

 

Consult with Innovacera Engineers

If you need any boron nitride components for high temperatures industry application or any technology questions, welcome to contact us at sales@innovacera.com or 86 592 558 9730, we will do our best to meet your requirement.