Product Details

Specifications

1. protection tube

2.Contents:RSiC

3. Function:anti-oxidation,anti-corrosion

Si3N4 Silicon Nitride thermocouple protection tube

Product Description

Silicon Nitride, mainly consistaing of Si3N4, is a gray hard and solid high performance ceramic material sythesized through several chemical reaction methods. STA offer three sintering methods for Silicon Nitride, Gas Pressure Sintering(GPSN), Hot Press Sintering(HPSN) and Reaction-Bonded Sintering(RBSN). Parts are pressed and sintered by well devoloped methods to achieve the outstanding properties.

This high performance ceramic material has the strongest covalent bond properties next to silicon carbide, it's used as high temperature ceramic components due to its superior hardness, strength and excellent thermal shock resistance, these properties make it ideal for use in mechanical, thermal and wear applications.

Although Silicon Nitride has high hardness, we owns strong machining ability to meet customers' requests on

sophisticated designs, tigth tolerances and smooth surface.

silicon nitride /si3n4 ceramic products

silicon nitride ceramics, GPS ceramic, structure ceramics, industrial ceramic, precise ceramics

Type : tube, bush, washer. pin, plate, block, rod, ball, bearing ball

Specifications: atandard size & suctomized size

Advantage: professional manufacturer with advanced technology of silicon nitride ceramics.

1. Longer service life of forming rolls. Service life of silicon nitride forming rolls is about 9 times and 2~3 times longer than that of metal and tungsten carbide forming roll, respectively.

2. Higher working temperature. Silicon nitride forming rolls could be used at , temperature up to 1000°C. While generally, steel forming rolls can only be used below 300°C

3. Better surface roughness quality of the metal works is achieved

4. Pick-up of the metal works is eliminated

5. Scrap of metal works is reduced

6. Consistency and reliability of metal works is in creased

7. Post-processing of metal works is reduced

8. Productivity is increased

Item	Si3N4 silicon nitride ceramic tube/bush/bushing
Material	Si3N4/Silicon Nitride
Form	Solid
Sintering Method	Gas Pressure Sintering
Ceramic Shape	Rod, Plate, Block, Ring, Washer, Disc, Wafer, Screw, Tube, Bush, Sleeve, Nozzle, Irregular Shapes and Customized Shapes.
Machining Ability	Cylindrical Grinding, Centerless Grinding, Plane Grinding, Polishing, Drilling, Cutting, Turning, etc.
Technology Advantage	With strong support from experienced and advanced R&D center, quality control team and professional machining technicians, we are more competitive in the stability of quality and superiority of property.
Delivery Advantage	Delivery time should be 3-5 days faster than industry average because of creative and effective management system.
Typical Applications	1. Rotating bearing balls and rollers
	2. Cutting tools
	3. Semiconductor handling parts
	4. Weld positioners
	5. Nozzles
	6. Metal tube forming rolls and dies
	7. Bearing balls and rollers
	8. Electronic components
	9. Engine and turbine components
	10. Amor
	11. Rotors

Typical characteristics of protection tube

1. High Hardness, Out Standing Wear Resistance

2. High Strength Over A Wide Temperature Range

3. Low Density, Light Weight

4. Good Thermal Shock Resistance

5. Low Thermal Expansion

6. Excellent Thermal Shock Resistance

7. Low Thermal Conductivity

8. Good Chemical Inertness, Acid and Alkali Corrosion

Properties of protection tube

Composition	Si3N4 99%
Volume Density	3.15g/cm3
Hardness	88HRA
Modulus of Elasticity	380Gpa
Bending Strength	480Mpa
High Service Temperature	1750°C
Thermal Expansion Coefficient	2.8 x 10^-6/°C
Thermal Conductivity	40~120 W/m.k
Open Porosity	0

Silicon Nitride Thermocouple Protection tube

1.Material:Si3N4 bonded SiC Protection Tube

2.Thermowell

3.Long lifetime

silicon nitride thermocouple protection tube

Si3N4 bonded SiC ceramic refractory material, is mixed with high pure SIC fine powder and Silicon powder, after slip casting course, reaction sintered under 1400~1500°C. During the sintering course, filling the high pure Nitrogen into the furnace, then the silicon will react with Nitrogen and generate Si3N4,So Si3N4 bonded SiC material is composed of silicon nitride (23%) and silicon carbide(75%) as main raw material,mixed with organic material,and shaped by mixture, extrusion or pouring,then made after drying and nitrogenization.

Si3N4 bonded SiC as a new type refractory material,is used widely.The applying temperature is 1400 C.It has better thermal stability,thermal shock,which is better than plain refractory material and recrystallized SiC.It also has antioxidation,high corrosion resistant,wear- resistantance,high bending strength.It can resist corrosion and scouring,be no polluted and fast heat conduction in molten metal such as AL,Pb,Zn,Cu ect.

Please check below specification

1.The diameter of Si3N4 bonded SiC thermocouple protection tube is Φ12-80mm,length is 1600 mm.It can be usded in high temperature kiln furnace and all kinds of atmosphere.It also can be directly used in all kinds of melted liquid.

2.Liquid tube,heating sheath,protection tube:used in aluminum liquid and glass liquid.It has good thermal conductivity,corrosion resistance,compression resistance,long life ect.

3.Roller tube:used in brick kiln furnace on the ground,diameter Φ30-50mm,length within 1600mm,high temperature resistance,no deformation,high strength.

4.Kiln furniture: used in tunnel kiln,shuttle kiln, down draught kiln,with good carrying capacity.It is ideal kiln furniture for increasing output of kiln furnace and make good use of space of kiln furnace.

5.Sagger:used for firing high grade refractory material,rare metal,powder metallurgy,electronic components and various loose material.Shape can be canister and rectangle.

6.Various refractory piece:with impact resistance,high temperature resistance,wear-resistance, good thermal shock resistance ect.Suitable for heat exchanger, cold air pipe, burner nozzle,crucible.

It can not only gain energy-saving effect,but also can keep product from pollution, and long life and convenient operation if you choose Si3N4 bonded SiC.

Product Photos