High Thermal Shock Industrial Insulation Si3n4 Tube

• Application: Refractory, Structure Ceramic, Industrial Ceramic
• Type: Ceramic Parts
• Product Name: Silicon Nitride Ceramic Bushing
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: Customized
• Shaping Methods: Dry Pressed, ISO Pressed, Hot Pressed
• Density: Over 3.2g/cm3
• Color: Black
• Surface Treatment: Diamond-Like Polishing
• Secondary Process: CNC Machining, Fine Grinding
• Tolerance: Od and ID Best to Be 0.005mm
• Certificate: RoHS, Reach, ISO9001:2008
• Feature: High Hardness, High Thermal Shock
• Usage: Ceramic Nozzle, Ceramic Bearing
• Transport Package: Individual Packaging
• Specification: Max. OD to be 800mm
• Trademark: JingHui
• Origin: China
• HS Code: 8547100000
• Production Capacity: 5000000PCS/Month
• Package Size: 36.00cm * 20.00cm * 24.00cm
• Package Gross Weight: 8.000kg

Product Description

High Thermal Shock Industrial Insulation Si3n4 Tube
 

Product Description

The prime features of silicon nitride ceramic bushing

1.Low density:  3.2 g/cm³   with lightweight than most other technical ceramics

2. Superior hardness, it's one of most hardest technical ceramic than others

3. Great wear resistance due to its exceptional hardness and self-lubricity

4. Low coefficient of thermal expansion and high thermal conductivity (20 W/m.k)

5. Great thermal shock resistance, it's up to 1000ºC under the special atmosphere

6. High mechanical strength and well resistance to impact than other advanced ceramics

7. Heat & high-temperature resistance, The max. service temperature can be up to 1300ºC

8. Chemical and corrosion resistance, resistant to almost all inorganic acids and many organic acids

9. At the same time, Silicon nitride is a high-performance electrical insulation material

The description of silicon nitride ceramic tube
Silicon nitride is a man-made compound synthesized through several different chemical reaction methods. Parts are pressed and sintered by well-developed methods to produce a ceramic with a unique set of outstanding properties. The material is dark gray to black in color and can be polished to a very smooth reflective surface, giving parts a striking appearance. High-performance silicon nitride materials were developed for automotive engine wear parts, such as valves and cam followers, and proven effective. The cost of the ceramic parts never dropped enough to make the ceramics feasible in engines and turbochargers. The very high-quality bodies developed for these demanding high-reliability applications are available today and can be used in many severe mechanical, thermal, and wear applications.

The specification

The specification of the ceramic tube

Material option	Silicon nitride(Si3N4), Zirconia (ZrO2),  Alumina(Al2O3), Silicon carbide(SiO2)
Forming methods	Dry pressed, Ceramic injection molding, Hot pressed, ISO pressed
Specification	OD can be from 1 to 50mm, length can be from 10mm to 800mm
Precision processing	CNC machining, Precision grinding, Polishing, Lapping,
Tolerance	The tolerance of OD and ID can be 0.001mm,  the tolerance of length can be 0.001mm
Key parameters	Roughness to be 0.02mm, Parallelism to be 0.001mm
Surface quality	Free of cracks, foreign contamination, mirror surface better than Ra0.1

The typical application of silicon nitride ceramics
They are widely used for producing bearings, shaft, gas turbine blades, mechanical seal rings, and permanent molds, steam nozzle, the heated surfaces of engine components

 

We also produce

The gallery of Si3N4 ceramic parts

 

Technical Datasheet

Datasheet of Technical ceramics

Property	Unit	Material
		Si3N4	99.5% Al2O3	99% Al2O3	96% Al2O3	ZrO2
Density	g/cm^3	≥3.20	≥3.90	≥3.85	≥3.65	≥6.0
Water absorption	%	-	0	0	0	0
Hardness	HV	-	1700	1700	1500	1300
Flexural strength	Mpa	≥600	≥379	≥338	≥320	≥1200
Compressive strength	Mpa	≥2500	≥2240	≥2240	≥2000	≥1990
Fracture toughness	Mpa m^1/2	6	4-5	4-5	3-4	6.5-8
Max. service temperature	ºC	1200	1675	1600	1450	1000
Coefficient of thermal expansion (CTE)	1×10 ^-6/ºC	3.2	6.5~8.0	6.2~8.0	5.0~8.0	8.0~9.5
Thermal shock	T(ºC)	≥600	≥250	≥200	≥220	≥300
Thermal conductivity(25ºC)	W/m.k	20	30	29	24	3
Volume resistivity	ohm.cm
25ºC		-	>1 x 10^14	>1 x 10^14	>1 x 10^14	>1 x 10^11
300ºC		-	1 x 10 ^12	8 x 10^11	10^12 -10^13	1 x 10 ^10
500ºC		-	5 x 10 ^10	2 x 10^9	1 x 10^9	1 x 10^6
Insulation strength	KV/mm		19	18	18	17
Dielectric constant(1Mhz)	(E)	6	9.7	9.5	9.5	29

 

Why choose us?

Our capability and strength

We have in-housing comprehensive manufacturing types of equipment, including forming, sintering,CNC machining, precision grinding, laser cutting, and so on, it helps us to control the quality very well. Also, it greatly benefits cost control.

 

FAQ

FAQs (Frequently Asked Questions)
Q1. Are you a factory or trading company?
A: We are a manufacturer with over 12 years of experience. You are welcome to visit our factory.

Q2: Do you send a sample to check?
A: Sure, the sample is free and freight collect.

Q3: When will you ship it?
A: If the products are in storage, we'll ship within 48 hours

Q4: 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.

Q5: Is it available to provide customized products?
A: We always support custom-made demand as per different materials, dimensions, and designs.