custom 99% Al2O3 aluminum oxide ceramic cylinder disc
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Alumina Ceramics:
Alumina Ceramic polycarbonate (PC in English) is a high molecular weight polymer containing carbonate groups in the molecular chain. According to the structure of the ester group, it can be divided into aliphatic, aromatic, aliphatic-aromatic and other types. Among them, the lower mechanical properties of aliphatic and aliphatic-aromatic polycarbonates limit their application in engineering plastics. Only aromatic polycarbonate has been industrialized. Due to the structural particularity of polycarbonate, it has become the fastest growing general engineering plastic among the five major engineering plastics. Polycarbonate is a tough thermoplastic resin whose name comes from the CO3 group inside. Can be synthesized by bisphenol A and carbon oxychloride (COCl2). The most commonly used method is melt transesterification (bisphenol A and diphenyl carbonate are synthesized through transesterification and polycondensation). Polycarbonate (PC) is a polyester of carbonic acid, carbonic acid itself is not stable, but its derivatives (such as phosgene, urea, carbonate, carbonate) have certain stability.
According to the different alcohol structure, polycarbonate can be divided into aliphatic and aromatic.
Aliphatic polycarbonate. Such as polyethylene carbonate, polytrimethylene carbonate and their copolymers, which have low melting point and glass transition temperature, poor strength, and cannot be used as structural materials; but with their biocompatibility and biodegradability characteristics, they can It has been used in drug slow-release carriers, surgical sutures, bone support materials, etc. Polycarbonate is resistant to weak acids, weak bases, and neutral oils.
Polycarbonate is not resistant to ultraviolet light and strong alkalis. PC is a linear carbonic acid polyester. The carbonic acid groups in the molecule are alternately arranged with other groups. These groups can be aromatic, aliphatic, or both. Bisphenol A PC is the most important industrial product.
properties: 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
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FAQ
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.
