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SINTYRON customized si3n4 silicon nitride tube

BeO metallized substrates are preferred in ultra-high-power and high-frequency applications where superior thermal management is critical. However, due to safety concerns, alternatives like AlN (aluminum nitride) are often used where possible. Proper industrial safety measures must be followed when processing BeO ceramics.

Email: sintyron@xtlceramic.com

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silicon nitride ceramic tube Description

Silicon nitride (Si₃N₄) tubes are advanced ceramic components known for their exceptional thermal,

mechanical, and chemical properties. Here’s a detailed overview:

Data Sheet & Typical properties of silicon nitride material:

Item	Unit	Si3N4
Type	–	Gas pressure sintered
Density	g/cm3	3.22
Color	–	dark grey
Water Absorption	%	0
Young Modulus	Gpa	290
Vickers Hardness	Gpa	18 – 20
Compressive Strength	Mpa	2200
Flexural Strength	Mpa	650
Thermal Conductivity	W/m.K	25
Thermal Shock Resistance	Δ(°C)	450 – 650
Max. Working Temp.	°C	1200
Volume Resistivity	Ω ·cm	> 10^14
Dielectric Constant	–	8.20
Dielectric Strength	kV/mm	16

Key Properties of Silicon Nitride Tubes:

High-Temperature Stability

Withstands temperatures up to 1,200–1,400°C in oxidizing environments and 1,800°C in inert atmospheres.

Low thermal expansion coefficient reduces thermal stress.

Mechanical Strength & Toughness

High flexural strength (600–1,000 MPa) and fracture toughness (6–8 MPa·√m).

Superior to alumina and zirconia in shock resistance.

Chemical Resistance

Resists corrosion from molten metals (Al, Cu), acids (except HF), and alkalis.

Ideal for harsh industrial and laboratory environments.

Electrical Insulation & Dielectric Properties

Excellent insulator even at high temperatures.

Used in semiconductor and electronics applications.

Applications of Silicon Nitride Tubes:

Thermocouple Protection Sheaths (high-temperature measurements)

Molten Metal Handling (e.g., aluminum casting, ladles)

Semiconductor Processing (diffusion furnaces, wafer carriers)

Kiln Furniture & Heat Exchangers (for extreme conditions)

Aerospace & Automotive (sensors, exhaust components)

Advantages Over Other Ceramics:

vs. Alumina (Al₂O₃): Better thermal shock resistance and strength.

vs. Zirconia (ZrO₂): Higher creep resistance at extreme temperatures.

Packing & Delivery

As a ceramic material, silicon nitride is quite fragile in a lot of cases. Our silicon nitride plate

& sheet are carefully handled to minimize damage during storage and transportation. Suitable

outer boxes and inner cushioning materials are used for Si3N4products, vacuum packing is

also engaged for some of the parts.

Company Profile

FAQ

Why us？
* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.

Are you a trading company or a manufacturer?
* We are a manufaturer.

Can you provide the free samples?
* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.

Do you accept customized production based our specification?
* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t have a drawing, just tell us your idea,
we will work out the drawing for you.

What's the delivery time?
* 7 working days for standard products 30 days for customized products.

What is the MOQ?
* No limit to the quantity. We can offer the best proposal and solutions according to your condition.

What is the payment terms you accept?
* T/T,LC,Western Union,moneygram are acceptable.

How to deal with the faulty?
* Firstly, Our product are produced in strict quality control system and the defective rate will be less than 2%.
If there are problems with the product, we will provide free replacement.