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wear corrosion resistant alumina insulator spacer ring

  • wear corrosion resistant alumina insulator spacer ring
  • wear corrosion resistant alumina insulator spacer ring
  • wear corrosion resistant alumina insulator spacer ring
  • wear corrosion resistant alumina insulator spacer ring

wear corrosion resistant alumina insulator spacer ring

    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
    Packaging: Customized
    Brand: Hard
    Transportation: Ocean,Land,Air
    Place of Origin: Guangdong,China
    Supply Ability: 1,000,000 pcs/Month
    Certificate: SGS
    Port: Shenzhen

Basic Info

Model No.: Al2O3 339

Product Description

wear corrosion resistant alumina insulator spacer ring

Reputation depends on quality, quality comes from Hard!

Alumina Ceramics:

It is used for grinding, grinding, drilling and polishing of hard materials such as cemented carbide and gemstones, the manufacture of metal boride and the smelting of sodium borohydride, boron alloy and special welding. Physical and chemical properties: Gray-black powder. The relative density is 2.52. The temperature of 2350 ° C. The boiling point is >3500 °C. It does not react with acid or alkali solution, and has high chemical position, neutron absorption, wear resistance and semiconductor conductivity. It is one of the most stable substances for acids and is stable in all concentrated or dilute aqueous solutions of acid or alkali. After treatment with a mixed acid of sulfuric acid and hydrofluoric acid, it is calcined at 800 ° C for 21 h in the air to completely decompose and form carbon trioxide and boron trioxide. There are special stability when some transition metals and their carbides coexist. The transition metal of Groups IV, V and VI of the Periodic Table of the Elements reacts strongly with the boron carbide powder at 1000 to 1100 ° C to form a metal boride. Packing and storage: Packed in polyethylene plastic box, stored in clean and dry warehouse. When it is melted with sodium hydroxide, potassium hydroxide, sodium carbonate or potassium carbonate in the presence of nitric acid, boron carbide is easily decomposed and made into a solution. Boron carbide, commonly known as synthetic diamond, is a boride with a very high hardness. Since boron carbide is a harder solid than silicon carbide or tungsten carbide, it has been used as a coarse sand abrasive material for a long time. Since it has a high melting point and is not easily cast into an artificial product, it can be processed into a simple shape by melting the powder at a high temperature. The sand machine is powered by compressed air to form a high-speed jet beam to spray the spray at a high speed to a machine that is required to process the surface of the workpiece to change the mechanical properties of the outer surface of the workpiece surface. The blasting machine realizes automatic blasting through the electric control system, which can automatically adjust the blasting angle, blasting time, blasting distance, backflushing time, movement of the spray gun, and the rotation speed of the table.
alumina ceramic


High hardness, high strength, wear resistance, corrosion resistance, high temperacture (1600°), good thermal diffusivity, good insulativity, low cost etc.

Data Sheet↓

Color: White/Ivory
Density: 3.9g/cm3
Alumina Content: 96% 99% 99.5%
Gas permeability: 0
Water Absorption: 0
MONS' Hardness: 82
Vickers Hardness (Hv50): 15.7(1600) Gpa(Kg/mm²)
Flexural Strength(20°C): 330Mpa
Compressive Strength(20°C): 2000Mpa
Fracture Toughness (20°C): 4 MPam1/2
Thermal Conductivity(20°C): 27.5W(m.K)
Thermal Expansion Coefficient: 7.6 10-6/°C

Thermal Shock Resistance: 200 △T°C

Maximum use temperature 1650°C

Dielectric Strength: >10 KV/mm

Dielectric Constant: 9.1er

Dielectric Loss Angle(1MHz): 0.0002-0.0003

Volume Resistivity(20°C): >1014Ω.cm

Application industry: Machinery, electronic, chemical, petroleum etc.
Specific application: Electrical ceramic substrate, plunger, sealing ring etc.

Why Choose Us?
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

Products Show

alumina ceramics


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 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 Info

  • 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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