High Thermal Stability Si3n4 Stalk Pipe Silicon Nitride Ceramic Riser Tube

• Customization: Available
• Application: Refractory
• Type: Ceramic Tube
• Model NO.: HBF-C001
• Name: Si3n4 Silicon Nitride Protection Tube
• Color: Black
• Size: Customised
• Density: 3.26g/cm3
• Certificate: ISO9001
• Vicker's Hardness: 18 Gpa
• Feature: High Hardness, High Strength
• Modulus of Elasticity: 290 Gpa
• Maximum Use Temperature: 1200c
• Compressive Strength: 2500 MPa
• Transport Package: Standard Export Cartons/Wooden Box/Tray
• Specification: Silicon Nitride
• Trademark: HB
• Origin: Jiangsu, China
• Production Capacity: 10000/Month
• Package Size: 45.00cm * 45.00cm * 35.00cm
• Package Gross Weight: 5.000kg

Product Description

Product Description

Gas Pressure Sintered Silicon Nitride Riser Tube

Silicon Nitride (Si3N4) Riser Tube (Stalk Tube) adopts isostatic pressing + gas pressure sintering technology, dedicated for molten aluminum/magnesium alloy transmission in low pressure die casting (LPDC).Si3N4 Stalk Tube,Ceramic Lift Tube,LPDC Riser Tube,Low Pressure Die Casting Ceramic Tube

Si3N4 Stalk Tube Thermal Shock Resistant for Aluminum Low Pressure Die Casting

Bulk Density:≥3.20 g/cm³
Apparent Porosity:0.8% (airtight, no melt penetration)
3-point Bending Strength:≥750 MPa
Fracture Toughness:6.0~7.2 MPa·m¹/²
Thermal Expansion Coefficient(20~800℃):2.6~3.2 ×10-6 /K
Max long-term working temperature:1200℃
Excellent non-wetting property to molten aluminum alloy
Resist erosion of Al, Mg, Zn molten metal
Available Structure: Straight tube, tube with integrated flange
Custom Parameters: Outer diameter, inner bore, total length, wall thickness, flange size, sealing surface
Surface Option: As-sintered, precision grinding inner hole

Si3N4 Stalk Tube, Silicon Nitride Lift Tube

Q1: What is the difference between silicon nitride riser tube, NSiC tube, aluminum titanate tube and cast iron tube?
A:
Cast iron: Low cost, short service life, easy corrode & pollute aluminum melt;
Aluminum Titanate: Poor thermal shock resistance, easy crack after long cycle;
NSiC(Nitride bonded SiC): Medium price, general toughness;

Si3N4 Silicon Nitride: Best thermal shock resistance, high toughness, non-wetting aluminum, first choice for high-end continuous LPDC mass production.

Q2: Can you customize the size of Si3N4 riser tube?
A: Yes. Please send us your drawing with OD, ID, total length, wall thickness and flange dimension.

We can produce according to drawings or physical samples.

Technical Specifications

(Custom configurations available upon request.)

Item	gas pressure sintering	hot pressing sintering	reactive sintering	pressureless sintering
Rockwell hardness (HRA)	≥75	-	>80	91-92
Volume density(g/cm3)	3.25	>3.25	1.8-2.7	3.0-3.2
Dielectric constant (εr20℃,1MHZ)	-	8.0(1MHz)	-	-
electric volume resistivity (Ω.cm)	1014	108	-	-
breaking tenacity (Mpa m1/2)	6-9	6-8	2.8	5-6
Elasticity modulus(GPa)	300-320	300-320	160-200	290-320
thermal expansivity (m/K*10-6/℃)	3.1-3.3	3.4	2.53	600
thermal conductivity (W/MK)	15-20	34	15	-
weibull modulus (m)	12-15	15-20	15-20	10-18

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FAQ

Q1: Can you provide exclusive customized solutions for special project demands? 
A1: Yes. In addition to conventional OEM and ODM customization, we can develop exclusive product structures, adjust technical parameters and optimize solutions according to special project standards, regional industry specifications and personalized buyer requirements, providing one-to-one customized technical support.
 
Q2: Do you support third-party factory inspection and product random testing? 
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Q3: How do you ensure on-time delivery for bulk orders? 
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Q4: Why is your factory price more stable than trading companies? 
A4: As a direct manufacturer, we control all links from raw material procurement, production processing to finished product output. There is no intermediate markup, and we can adjust costs according to long-term cooperative orders, maintaining stable and transparent pricing for long-term strategic partners.
 
Q5: What customized service items can you support besides product structure? 
A5: Besides structural size and precision tolerance customization of industrial ceramic and quartz products, we support personalized services including custom deep processing, surface treatment, laser marking, custom packaging and technical document customization to meet different industrial and brand standards.