99% 99.5% Alumina Ceramic flat plate plank
Reputation depends on quality, quality comes from Hard!
Alumina Ceramics:
Ceramic antennas have different radiating or receiving capabilities for different directions in space. This is the directivity of ceramic antennas. A directional pattern is usually used to measure the directivity of a ceramic antenna. On a horizontal plane, an antenna with no maximum direction of radiation and reception is called an omnidirectional antenna, and an antenna with one or more maximum directions is called a directional antenna.
Voltage standing wave ratio
When the input impedance of the ceramic antenna is not the same as the characteristic impedance of the feeder, the generated reflected wave and incident wave are superimposed on the feeder. The ratio of the maximum and minimum values of adjacent voltages is the voltage standing wave ratio, which is used to check the transmission of the feeder. On the basis of efficiency, the voltage standing wave ratio is less than 1.5, the voltage standing wave ratio at the operating frequency is less than 1.2, and the voltage standing wave ratio is too large, which will shorten the communication distance, and the reflected power will return to the power amplifier part of the machine, which easily burns out the power amplifier tube. Affects the normal operation of the communication system. So many benefits, of course, are inseparable from the word ceramic. The ceramics here are generally alumina ceramics. Generally, the ceramic antenna is an Alumina Ceramic Substrate. The great ability of ceramic antennas can be attributed to alumina ceramics. Substrates, alumina ceramic substrates have excellent anti-interference, lightning protection, waterproof and dustproof functions, but this is not the point. The important point is that the alumina ceramic substrate has low dielectric loss. It is even more powerful when applied to current high-frequency antennas. . With the alumina ceramic substrate, the volume of the ceramic antenna can be made smaller, making our mobile communication more powerful.
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
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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.
