Si3N4 Nozzle Silicon Nitride Ceramic with Oxidation Resistance High Toughness and High Temperature Strength

Price Negotiable

Price: 200-500 yuan/kg

MOQ: Negotiable

Delivery Time: Negotiable

Brand: KEGU

Product Description

Si3N4 Nozzle Silicon Nitride Ceramics

Silicon nitride nozzles and covers feature exceptional oxidation resistance, high temperature strength, and minimal sputter adhesion, significantly extending the service life of welding components.

Among the five silicon nitride production methods, Gas Pressure Sintering (GPS) is most commonly used for manufacturing Si3N4 components. GPS involves sintering at temperatures around 2000°C under nitrogen pressures of 1-10 MPa. The high nitrogen pressure prevents silicon nitride decomposition, while elevated temperatures enable substantial grain growth with minimal sintering aids. This process yields high-toughness ceramics with long columnar grains and densities exceeding 99%, providing excellent toughness, strength, and wear resistance while enabling near-net-shape production to reduce manufacturing costs.

Silicon Nitride Nozzle & Covers Specifications

Size	Customized
Color	Black
Density	3.22 g/cm³
Flexural Strength	800 MPa
Fracture Toughness	6.5 MPa·m¹/²
Thermal Stress Parameters	569 K

Material Properties Data Sheet

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 Temperature	°C	1200
Volume Resistivity	Ω·cm	>10¹⁴
Dielectric Constant	-	8.20
Dielectric Strength	kV/mm	16

* Tests conducted under room temperature environment
* Properties may vary depending on manufacturing method

Key Material Characteristics

High strength across wide temperature ranges
Exceptional fracture toughness
High hardness rating
Outstanding wear resistance
Low thermal expansion with high thermal conductivity
Excellent thermal shock resistance
Superior chemical and oxidation resistance

Contact our sales team at sales@industrial-ceramicparts.com for detailed information or technical inquiries.

Packaging & Handling

Silicon nitride's inherent fragility requires careful handling during storage and transportation. Our nozzles and covers are packaged using protective outer boxes and specialized cushioning materials. Vacuum packaging is employed for select components to ensure optimal protection.