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Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum

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Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum

Name: Silicon Nitride Heater Protection Tube with 1450 Max Service Temp High Thermal Shock Resistance and NonReactive with Molten Aluminum
Brand: KEGU
Price: 200 USD

Wholesale Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum from china suppliers

Brand Name : KEGU

Place of Origin : China

Price : 200-500 yuan/kg

Payment Terms : L/C,D/A,D/P,T/T,Western Union,MoneyGram

Supply Ability : 2,000 pcs/month

Packaging Details : Strong wooden box for Global shipping

Model Number : Customizable

Material : Silicon Nitride

Composition:SiC : ＞85%

Color : Black

Density : 3.20-3.26g/cm3

Max. Service Temp : 1450℃

Flexural Strength : 250MPa

Sample : Customizable

Chemical Stability : High

Apparent Porosity : 0-0.1%

Elastic Modulus : 300-320GPa

Compression Strength : >1500MPa

Vickers Hardness(HV0.5) : 15-16GPa

Thermal Conductivity : 20-25W/(m.k)

Specific Resistivity : 10^14Ω·cm

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Product Description

Our advanced silicon nitride ceramic heater protection tubes are engineered to deliver superior performance in aluminum melting and holding applications. With enhanced thermal and mechanical properties compared to conventional materials, silicon nitride enables reliable, long-lasting protection for your heating systems.

Key Advantages of Silicon Nitride Protection Tubes

Excellent High-Temperature Performance: Si3N4 is the ideal material for electric and gas heater protection tubes, offering superior high-temperature strength and thermal shock resistance (ΔT 400–500°C).
Extended Service Life: Withstands prolonged thermal loads from heating elements or burners, providing reliable operation for over one year.
Improved Energy Efficiency: Submerged heating with silicon nitride protection tubes can achieve 20–30% higher energy efficiency compared to traditional top radiant heating methods.
Prevents Molten Aluminum Oxidation: Minimizes overheating and oxidation of the upper aluminum layer, ensuring better metal quality.
Non-Reactive with Molten Aluminum: Does not contaminate the molten aluminum bath, helping to maintain metal purity and consistency.

Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum

Technical Property Comparison: Silicon Nitride vs. Other Ceramics

Category	Property	Unit	99% Al₂O₃	S-SiC	ZrO₂	Si₃N₄
Physical	Density	g/cm³	3.9	3.1	6.0	3.2
	Water Absorption	%	0	0.1	0	0.1
	Sintering Temperature	°C	1700	2200	1500	1800
Mechanical	Hardness (HV)	HV	1700	2200	1300	1400
	Flexural Strength	MPa (kgf/mm²)	~343 (3500)	~392 (4000)	~882 (9000)	~686 (7000)
	Compressive Strength	MPa (kgf/mm²)	~2942 (30000)	~1961 (20000)	~1961 (20000)	~2255 (23000)
Thermal	Max Working Temperature	°C	1500	1600	1300	1400
	Thermal Expansion Coefficient (0-1000°C)	10⁻⁶/°C	8.0	4.1 (0-500°C)	9.5	2.0 (0-500°C)
				5.2 (500-1000°C)		4.0 (500-1000°C)
	Thermal Shock Resistance	ΔT (°C)	200	250	300	400-500
	Thermal Conductivity (25°C)	W/m·K	31	100	3	25
	Thermal Conductivity (300°C)	W/m·K	16	100	3	25
Electrical	Volume Resistivity (20°C)	Ω·cm	>10¹²	10⁶–10⁸	>10¹⁰	>10¹¹
	Volume Resistivity (100°C)	Ω·cm	10¹²–10¹³	–	–	>10¹¹
	Volume Resistivity (300°C)	Ω·cm	>10¹²	–	–	>10¹¹
	Dielectric Strength	kV/mm	18	Semiconductor	9	17.7
	Dielectric Constant (1 MHz)	ε	10	–	29	7
	Dielectric Loss Tangent	tan δ	0.4 × 10⁻³	–	–	–

Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum

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