silicon nitride ceramic yarn wheel guide roller caster
|Payment Type:||L/C,T/T,D/P,Paypal,Money Gram,Western Union|
|Terms of Trade:||FOB|
|Min. Order:||1 Piece/Pieces|
|Delivery Time:||15 Days|
|Place of Origin:||Guangdong,China|
|Supply Ability:||1,000,000 pcs/Month|
Model No.: Si3N4-077
silicon nitride ceramic yarn wheel guide roller caster
Reputation depends on quality, quality comes from Hard!
Silicon Nitride Ceramic:
Since silicon nitride is a covalent compound with high bond strength and can form an oxide protective film in air, it also has good chemical stability. It is not oxidized below 1200 °C, and a protective film is formed at 1200 to 1600 °C to prevent further. Oxidation
Methods for measuring Young's modulus generally include stretching method, beam bending method, vibration method, internal consumption method, etc., and experiments using fiber displacement sensors, moiré fringes, eddy current sensors, and wave transfer technology (microwave or ultrasonic) have also appeared. Techniques and methods for measuring Young's modulus
There are two crystal forms of Si3N4, namely α-Si3N4 (granular crystal) and β-Si3N4 (long column or needle crystal), all of which belong to hexagonal crystal system, which are three-dimensional space composed of [SiN4] tetrahedron sharing apex angle. The network and phase are formed by overlapping six hexagonal ring layers composed of almost completely symmetrical [SiN4] in the c-axis direction and the α phase is composed of two different and deformed non-hexagonal ring layers overlapping to form α-phase structural symmetry. Low, the internal strain is larger than the β phase, so the free energy is higher than the β phase, and the α phase can be converted to the β phase at a higher temperature (1400°C to 1600°C). Therefore, some people refer to α-Si3N4 as a low temperature type, which is unstable. β-Si3N4 is a high temperature type, which is a stable high temperature insoluble compound, has no melting point, and has high resistance to high temperature creep. The binder-free reaction sintered silicon nitride has a softening point of 1800 ° C or higher, FLToma et al.  Laser etching technology is used instead of the traditional sand blasting process to treat Si3N4 ceramics, which can better combine the coating with the Si3N4 ceramic matrix and reduce the friction coefficient of the frictional contact surface. There are a total of Si, N, H, F four elements, relatively easy to determine, silicon nitride + hydrofluoric acid = PTFE Silicon + ammonia (silicon is easy to combine with F to produce silicon tetrafluoride. This is common sense, remember (and the reason why hydrofluoric acid is not stored in glass containers (silica)), the price of silicon and fluorine in the reaction The state can be determined to be constant, and if H and N are redox generating hydrogen and nitrogen, the possibility is small, so there is no valence change in the reaction)
High hardness, high strength, wear resistance, corrosion resistance, high temperature(1200°), good thermal diffusivity, good thermal shock resistance(avoid the temperature changing rapidly), good insulativity, low density. The comprehensive properties are best in most of structure ceramic.
Data Sheet↓Color: Black Grey
Vickers Hardness (Hv50): ＞1550 HV0.5
Modulus of Elasticity: 290Gpa
Flexural Strength: ＞600Mpa
Compressive Strength: 2500Mpa
Modulus of Elasticity(25°C): 65Gpa
Fracture toughness:＞6.0 Mpam1/2
Maximum Use Temperature: 1200°C
Thermal Conductivity:15-20 W(m.K)
Thermal Expansion Coefficient: ＞3.1 10-6/°C
Thermal Shock Resistance: 500 △T°C
Special Heat Capacity: 700 KJ/kg.K
Dielectric Strength: 1 KV/mm
Dielectric Constant: er
Volume Resistivity(20°C): 1.0*10(12)Ω.cm
Machinery, electronic, semiconductor, chemical, petroleum, smelt.
Welding shaft, electronic substrate, plunger, nozzle, slide guide, diesel parts, metal molding, shaft wheels etc.
1.12 years of professional production industrial ceramics factory
2.High quality products with low price
3.High precision parts with lowest tolerance
4.Short time for production
5.Has a group of experienced, professional and efficient R&D team
6.Has a good reputation in China and abroad.
7.MOQ is not limited, small quantity is welcome.
8.Vigorous team and good after-sales service
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-30 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
SHENZHEN HARD PRECISION CERAMIC CO.,LTD
Shenzhen Hard precision ceramics Co., LTD. has been committed to design, development and manufacture of industrial ceramic products since 2007. Compared with metal, advanced ceramic has the following excellent performance: high hardness, high strength, high temperature (fire), and can wear resistance, corrosion resistance, acid and alkali resistance, oxidation resistance, insulation, non-magnetic and good chemical stability . So it is often used in the environment where the metal material cannot endure. With its promising application , advanced ceramics are widely used in aerospace, aviation, military industry, nuclear power, machinery, textile, chemical, electronics, food, medical and other industries. Our advanced ceramic products made by zirconia (ZrO2), alumina (Al2O3), silicon nitride (Si3N4), etc. Our products can divide into two parts: one part is ceramic ball, rods, tubes, ceramic materials such as plate, block, strip and so on, and the other part is the precision ceramic parts which are for industrial use and civilian products. Our company has advanced one-stop equipment and technology of ceramic forming, sintering and processing. Hope we can establish excellent cooperation with customers from at home and abroad for a wide range .
- Company Name: SHENZHEN HARD PRECISION CERAMIC CO.,LTD
- Representative: ZHOU SHENGBIN
- Product/Service: Alumina Ceramics , Zirconia Ceramics , Silicon Nitride Ceramics , Machinable Glass Ceramics , Laser Cutting Ceramics , Other Materials
- Capital (Million US $): US$500,000
- Year Established: 2007
- Total Annual Sales Volume (Million US $): US$2.5 Million - US$5 Million
- Export Percentage: 81% - 90%
- Total Annual Purchase Volume (Million US $): US$1 Million - US$2.5 Million
- No. of Production Lines: 5
- No. of R&D Staff: 5 -10 People
- No. of QC Staff: Fewer than 5 People
- OEM Services Provided: yes
- Factory Size (Sq.meters): 1,000-3,000 square meters
- Factory Location: 1st F, Building 8, Nangang Second Industrial Zone, Nanshan Dist, Shenzhen,China 518055
- Contact Person: Mr. Watson Lin
- Tel: 86-0755-86238834
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