hard wearable ivory pure Alumina Ceramic Bar customized
Reputation depends on quality, quality comes from Hard!
Alumina Ceramics:
When the bound water is discharged, the volume of the green body does not shrink, which is relatively safe. 2.2 The drying process of the green body is based on the convection drying process. The drying process of the green body can be divided into: heat transfer process, external diffusion process, internal diffusion process A process that is simultaneously and interrelated. In the heat transfer process, the heat of the drying medium is transferred to the surface of the blank by convection, and then transferred from the surface to the interior of the blank by conduction. The moisture on the surface of the blank is vaporized by heat. From liquid state to gas state. Outer diffusion process: the water vapor generated on the surface of the body passes through the bottom layer of the laminar flow, and under the effect of the concentration difference, it moves from the surface of the body to the drying medium in a diffusion manner by the diffusion method. The evaporation of moisture on the surface of the body causes a humidity gradient inside to promote the diffusion of moisture from the inner layer with a higher concentration to the outer layer with a lower concentration, called wet conduction or wet diffusion. In the case of stable dry conditions, the surface temperature and moisture of the body The content, drying rate and time have a certain relationship. According to the changing characteristics of the relationship between them, the drying process can be divided into three processes: heating stage, constant speed drying stage, and reduced speed drying stage. In the heat stage, since the heat transferred from the drying medium to the surface of the blank in a unit time is greater than the heat consumed by the evaporation of the surface water, the temperature of the heated surface gradually increases until it is equal to the wet bulb temperature of the drying medium, at which time the surface obtains heat and evaporation The heat consumption reaches a dynamic equilibrium and the temperature remains unchanged. At this stage, the water content of the green body decreases and the drying rate increases. At the constant speed drying stage, the unbound water is still discharged at this stage. Due to the high water content of the green body, how much water has evaporated on the surface, How much water can be replenished inside, that is, the speed of water movement inside the body (internal diffusion speed) is equal to the evaporation rate of the surface water, and also equal to the external diffusion speed, so the surface remains moist.
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.
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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.
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A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
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A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
