Boran nitride (BN) (technical)

Boron nitride is a ceramic material that is characterized by relatively high thermal conductivity (can reach up to 90 W / m * K) and resistance to high temperatures. Unlike other ceramic materials, the operating temperature can reach up to 2100 C in a vacuum and an inert environment and 1000 C in an oxygen environment. The material also belongs to the group of refractory materials due to the described properties.

Specifications

Properties	Conditions	Unit	Type
Colour			белый	белый	белый	белый	белый	белый	белый
Bulck density		г/см³	≥ 2,20	≥ 2,25	≥ 2,40	≥ 2,80	≥ 2,80	≥ 2,30	≥ 2,63
Water absorption	—	%						0	0

Flexural strength		МПа	65	65	80	90	90	≥ 600	≥ 320
Compressive strength		МПа	145	145	175	220	220	150	≥ 1000
Modulus of elasticity		ГПа	—	—	—	—	—	62	55
Poisson 's Ratio			—	—	—	—	—	0,2	—
Hardness		кг/мм²	—	—	—	—	—	1100	1224
Fracture toughness		МПа∙м^1/2	—	—	—	—	—	5,4	≥ 482

Coefficient of thermal expansion	25-1000 °C	10^-6 /°C	2,0	2,0	2,8	3,5	2,8	1,9	5,2
	20-800 °C	10^-6 /°C						1,9	5,2
	40-800 °C	10^-6 /°C
Thermal conductivity	—	Вт/м∙K	35	35	45	30	85	35	90
	25 °C	Вт/м∙K						35	90
	100 °C	Вт/м∙K						35	90
Maximum operating temperature		°C						1000	900
	в O2	°C	1000	1000	1000	1000	1000	1000	900
	в вакууме	°C	1750	1800	1800	1800	1800	—	—
	в инертных газов	°C	1750	1800	1800	1800	1800	—	—
Dielectric constant	1 МГц	—						6,8	7,3
Volumetric resistance	25 °C	Ом∙см	≥ 1013	≥ 1013	≥ 1012	≥ 1012	≥ 1013	≥ 1013	≥ 1014
	300 °C	Ом∙см
	500 °C	Ом∙см

Thick film			нет
Thin film			да

Application area

turbine parts (blades, etc.);
furnace parts;
snap-in;
enclosures;
any products operating at elevated temperatures (more than 1000 C).

Boran nitride (BN) (technical)

Specifications

Application area

See also