Bn/Boron Nitride Ceramic Protective Tube for High Temperature Furnace

Product Description

BN/Boron Nitride Ceramic Protective Tube For High Temperature Furnace
 

The specification of the technical ceramic tube

Material	Boron nitride (BN), aluminum nitride (AlN), alumina(al2o3), zirconia(ZrO2), silicon nitride(Si3N4), silicon carbide(SiC)
Color	Gray, black, white, pink, ivory, yellowish available
Dimensional capability	Max OD to be 400mm
Tolerance	OD can be ± 0.01mm, Thickness can be ± 0.005mm
Surface treatment	natural surface, lapping, diamond-like polishing, metallization, glazed

The main features of the boron nitride ceramic tube
1) BN is an easier machining advanced ceramic than the others, it can achieve the accuracy of 0.01mm;
2) The dielectric strength is 2300v/cm, which is 8 times that of Al2O3; RT resistivity at 1000ºC>10^-7 Ω.cm;
3) Excellent thermal shock resistance, recover one hundred times from 20ºC to 1000ºC without damage;
4) For common metals (iron, copper, aluminum, lead, etc.), rare earth metals, precious metals, semiconductor materials (germanium, silicon, potassium arsenide), glass, molten salts (crystallite, fluoride, slag), inorganic acids, Alkali does not react.

The description of boron nitride ceramic
Boron nitride crystal belongs to the hexagonal crystal system, the structure is similar to graphite, and there are many similarities in performance, so it is also called "white graphite".
It has good heat resistance, thermal stability, thermal conductivity, high-temperature dielectric strength, and is an ideal heat dissipation material and high-temperature insulating material. Boron nitride has good chemical stability and can resist most of the erosion of the molten metal. It also has good self-lubricating properties. Boron nitride products have low hardness and can be machined with an accuracy of 1/100mm.

The application of boron nitride ceramic
Boron nitride can be used to make crucibles for smelting semiconductors and high-temperature containers for metallurgy, semiconductor heat-dissipating insulation parts, high-temperature bearings, thermowells, and glass-forming molds.
 It is a new type of high-temperature-resistant super-hard material used to make drill bits, abrasive tools, and cutting tools.

Boron nitride ceramic properties

Property	Unit	Value
Density	g/cm^3	≥ 2
Hardness	HL	300
Flexural strength	MPa	35
Coefficient of thermal expansion (25ºC~1000ºC)	10^-6/K	-1~2.5
Thermal conductivity(25ºC)	W/m.k	50
Max service temperature	Oxidizing	900ºC
	Vacuum	1800ºC
	Inert gas	2200ºC
RT Resistivity	Ω.cm	>10^14

Other related products for boron nitride ceramics





Remark:
We produce a selection of technical ceramic tubes in different materials, customized designs, including boron nitride ceramic tubes, alumina ceramic tubes, zirconia ceramic tubes, silicon nitride ceramic tubes, and silicon carbide tubes.

Why choose us? 
1. 10+ Years of manufacturing experience in OEM, ODM and trusted & professional teams
2. Powerful R&D, prototyping & mass production capability to support trial order and high volume production
3. In-house comprehensive manufacturing types of equipment from raw materials to high precision machining
4. Rigorous quality control system and processes, including IQC, IPQC, QA, OQC in working instructions
5. Surpassing pre-sales, sales, and after-sales service, abide all orders every customer as the first priority

Production capability and our strength






Rigorous quality-control system





FAQs (Frequently Asked Questions)
Q1. Are you a factory or trading company?
A: We are a direct professional manufacturer for technical ceramics. You are welcome to visit our factory.
Q2: Do you send a sample to check?
A: Sure, the free sample with standard design in stock can be supplied, but freight collect.
Q3: When can I get the price?
A: We regularly quote within 24 hours after we get your inquiry. If you are in urgent need of getting the price.
Please call us or tell us in your email so that we will proceed with your inquiry as a priority.
Q4: Is it available to provide customized products?
A: We always support custom-made ceramic sheets as per different materials, dimensions, and designs.
Q5: What any other products do you manufacture?
A: Yes, we also produce metalized ceramics, ceramic tubes, zirconia ceramic parts, ceramic seals besides ceramic wafers.