Si3N4 Silicon Nitride Ceramic

Si3N4:


1, corrosion-resistant strong acid, alkali, seawater can also be used.
2, high temperature, ultra-wear-resistant, silicon nitride ceramic ball at 8000C, the strength,
hardness almost unchanged.
3, non-magnetic, insulation, magnetic field can also be used, non-conductive.
4, light weight, lighter than the average material bearing 1/4, the density of 3.20g / cm3.
5, high rigidity, high strength, the hardness of the bearing than the double, elastic
modulus of about 1/3.
6, high-speed rotation, rotating body (ball) light weight, small centrifugal rotation.
7, silicon nitride ceramic ball linear expansion coefficient of 3.2 Ã? 10-6 / K, almost
1/4 of bearing steel.
8, silicon nitride ceramic ball bearing self-lubricating can solve the lubrication caused
by pollution and add inconvenience.
9, drug resistance, mechanical strength, damage toughness, low thermal conductivity.
Application areas: composite bearings, mechanical seals, chemical pumps, nozzles,
auto parts, heat exchanger parts, vacuum equipment and other harsh environments.

PRODUCT
SILICON NITRIDE BALLS(Si3N4)
DIAMETER
Φ0.5mmâ??Φ80.0mm
GRADE
G5-G25
PERFORMANCE
1,59% lighter than the ball, which means less centrifugal force and wear less groove at high speed and acceleration.
2, 44% of the modulus of elasticity, which means less load deformation.
3, Rockwell hardness 92
4, the smaller the coefficient of friction
5, only 1/4 of the thermal expansion coefficient of steel, you can tolerate high temperatures.
6, can achieve excellent surface finish, Ra can be 4 to 6.
7, can withstand high temperature and high hardness and strength up to 1050 ° C
8, never rust, can be no lubricant. The
9, more resistant to corrosion than steel.
APPLICATION
Silicon nitride ceramic ball can be used for a variety of bearing performance requirements: high-speed / ultra-high-speed bearings, high precision bearings, vacuum bearings, high / low temperature bearings, non-magnetic bearings, high precision ball screw; , High temperature pump, metering pump used as a ball, measuring the ball. Silicon nitride ceramic ball is generally assembled into a hybrid bearing, can be used in high-tech industries such as aviation, defense and other industries, can also be widely used in chemical, metallurgical, medical, food, oil, electronics and other industries.

silicon nitride ceramics


Silicon nitride ceramic is an inorganic material ceramic that does not shrink during sintering. The strength of silicon nitride is very high, especially hot-pressed silicon nitride, which is one of the hardest substances in the world. It has high strength, low density, high temperature resistance and other properties.
High temperature resistance, the strength can be maintained to a high temperature of 1200 without decreasing, and will not melt into a molten body after being heated, and will not decompose until 1900 It has amazing chemical corrosion resistance, and can withstand almost all inorganic acids and less than 30% caustic soda solution, as well as many organic acids; It is also a high-performance electrical insulating material.
Si3N4 can be used to manufacture ball bearings by virtue of its light weight and high rigidity. It has higher accuracy than metal bearings, generates less heat, and can operate in higher temperatures and corrosive media. The steam nozzle made of S ceramic has wear resistance, heat resistance and other characteristics, and it will not be obviously damaged after being used in 650 boiler for several months.

Technical Data



Breaking Strength
at Room Temperature
900Mpa
Fracture Toughness
at Room Temperature
6.0-8.0 Mpa.m1/2

Volume Density
3.20-3.4g/cm3
Volume Resistivity
at Room Temperature
1014Ω.cm

Relative Dielectric Constant
at Room Temperature
6-7
Heat Conductivity
23-25W/m-k

Thermal Expansion Coefficient
3.110-6/
Hardness
HRA92-94





Main Performance Indexes of Silicon Nitride Ceramics:



Performance
Reactive Sintering
Silicon Nitride
Normal Pressure
Sintering Silicon Nitride
The Companys
Hot Pressed Sintering
Silicon Nitride

Volume Density
g/cm3
2.21
3.15
3.2~3.3

Bending StrengthMpa
137.3
490.3
900

Fracture Toughness
(Mpa·m1/2)
2.17
4.71
6.0~8.0

Hardness
(HRA)
87.0
92.0~94.0

Heat Conductivity Coefficient
(W/m·k)
5.44
12.56
23~25

Thermal Expansion Coefficient
10-6
(RT~1200)
3.2
3.2
2.95~3

The long-term practical use proves that SG-28 Silicon Nitride Ceramic is very suitable for low-pressure casting machines and dosing furnaces.
Compared with traditional cast iron, silicon carbide, carbon nitrogen materials and Aluminum Titanate, Silicon Nitride Ceramics have the best high-temperature strength and the service life can last for more than one year.
The low wettability to aluminum liquid, makes the SG-28 Silicon Nitride Ceramic effectively reduce the slagging on the inner and outer walls of the riser tube, reduce the shutdown loss and maintenance.
SG-28 Silicon Nitride Ceramic has excellent corrosion resistance, which can effectively reduce the pollution to the aluminum liquid, and improves casting quality.

Rated Voltage 110V-380V 50/60Hz

Rated Power 500W-3000W

Insulation electric strength 2,500V, 50Hz at room temperature, no punch-through in one minute

Leakage current 0.025mA under normal operating condition, 10 mA in water after broken

Acid corrosion resistance Boil for 6h in 5% sulfuric acid solution, corrosion rate 10g/m2.h

Alkali corrosion resistance Boil for 6h in 30% NaOH solution, corrosion rate 0.6g/m2.h

Life 5000h

Technical Data



Breaking Strength
at Room Temperature
900Mpa
Fracture Toughness
at Room Temperature
6.0-8.0 Mpa.m1/2

Volume Density
3.20-3.4g/cm3
Volume Resistivity
at Room Temperature
1014�©.cm

Relative Dielectric Constant
at Room Temperature
6-7
Heat Conductivity
23-25W/ m-k

Thermal Expansion Coefficient
3.1Ã??10-6/
Hardness
HRA92-94





Mechanical Property

Hardness HRA
Fracture Toughness Mpa.m1/2
Bending Strength Mpa

92.0~94.0
6.0~8.0
900





The product is liquid heating silicon nitride ceramic heating element, applicable media: liquid, water, heater within 3,000W, boiler within 2,500W, steamer within 1,800W. Match J ?, K ?, L ?, R ? and U ? packaging.

Executive Standard: JB/T10320-2002 Household and Similar Silicon Nitride Heating Elements







Liquid Heating Silicon Nitride Ceramic Heating Element



The product uses high-performance silicon nitride ceramics as the matrix, has strong high temperature mechanical strength, heat shock resistance, acid and alkali corrosion resistance, and excellent insulating property and conducting property, besides, unique formula and hot pressing manufacturing technology of the company make the product have the following performances and characteristics:

Good electrical security, leakage current less than 10mA after breaking

Thermostability, dry point reaching 1,300

High hydraulic loading rate, hydraulic loading rate of heating liquid reaches 78w/cm2 maximally

Small volume, high power

Little thermal inertia, rapid temperature rise

Long service life

Application Range of Acid and Alkali Corrosion Resisting Liquid Heating Type Silicon Nitride Ceramic Heating Element

Rapid Heating and Water Storage Electric Heater

Constant Temperature Bathtub Heater

Sauna Steam Generator

Rapid Heating Liquid Heater

Directly-heated Electric Heating Faucet and Liquid Heater

Energy-saving Rapid Heating Electrical Heater

Electric Heater

Widely used for instant, directly-heated and water storage, and energy-saving instant heating electric heaters, instant liquid heaters, electric heaters, cold and hot drink dispensers, air-conditioning heaters, air energy heaters, instant faucets, thermostats, steam generators, and other industries of household, industrial and commercial electric heaters.

As manufacturer and supplier of industrial ceramics , Chemshun Ceramics supply silicon carbide ceramic plate as bulletproof body vest protective materials . more ballistic armor ceramic shapes includes Square, rectangle, triangles , hexagonal etc. Customized shapes acceptable.

Si3n4:


1, corrosion-resistant strong acid, alkali, seawater can also be used.
2, high temperature, ultra-wear-resistant, silicon nitride ceramic ball at 8000c, the strength,
Hardness almost unchanged.
3, non-magnetic, insulation, magnetic field can also be used, non-conductive.
4, light weight, lighter than the average material bearing 1/4, the density of 3.20g / cm3.
5, high rigidity, high strength, the hardness of the bearing than the double, elastic
Modulus of about 1/3.
6, high-speed rotation, rotating body (ball) light weight, small centrifugal rotation.
7, silicon nitride ceramic ball linear expansion coefficient of 3.2 ã? 10-6 / k, almost
1/4 of bearing steel.
8, silicon nitride ceramic ball bearing self-lubricating can solve the lubrication caused
By pollution and add inconvenience.
9, drug resistance, mechanical strength, damage toughness, low thermal conductivity.
Application areas: composite bearings, mechanical seals, chemical pumps, nozzles,
Auto parts, heat exchanger parts, vacuum equipment and other harsh environments.

Product,
Silicon nitride balls(si3n4)
Diameter,
Φ0.5mm80.0mm
Grade,
G5-g25

Faq:

Q1. Can i have a sample order ?
A: yes, we welcome sample order to test and check quality. Mixed samples are acceptable.
Q2. What about the production time?
A:sample needs 3-5 days, mass production time needs 2-3 weeks for order quantity more than
Q3. How do you ship the goods and how long does it take to arrive?
A: we usually ship by dhl, ups, fedex or tnt. It usually takes 3-5 days to arrive. Airline and sea shipping also optional.
Q4. How to proceed an order ?
Firstly let us know your requirements or application.
Secondly we quote according to your requirements or our suggestions.
Thirdly customer confirms the samples and places deposit for formal order.
Fourthly we arrange the production.

Specified for use in high-technology industries such as aerospaace and defense. Excellent corrosion resistance withstands attack from harsh chemicals and demanding environmental conditions. Light weight Silicon Nitride weighs 60% less than steel which reduces centrifugal force, skidding and wear under high speed and acceleration. High Temprature Hardness is twice that of Steel.

Boron Nitride Ceramics

Boron nitride ceramics are made by hot pressing boron nitride powders at high temperature and pressure�¯�¼? they can easily be machined into rods, bars, plates and even intricate custom shapes. The excellent highly exceptional thermal, physical and chemical characteristics of boron nitride ceramics make it ideal for solving tough challenges in a wide range of industrial applications.�?� 

Excellent thermostable performance (Temperature �¢?�¥ 2000�¢?? in vacuum and inert atmosphere)
Excellent thermal shock resistance
Excellent lubricating properties
High thermal conductivity
High electrical resistivity
Good chemical inertness
Non-wetting (without oxidation)
Excellent machinability


It is widely used in many fields
The ceramics are hard and can be made into high-speed cutting tools and drill bits used in geological exploration and oil drilling.
Different shapes, can be used for high temperature, high voltage, insulation and heat dissipation components.
Ceramics can be used to make packaging materials to prevent neutron radiation.
Ceramics can be used to make special electrolysis and resistance materials under high temperature conditions.

We can make different shapes of ceramics according to your requirements and your drawing, welcome and looking forward for your inquiring!