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COPPER CLAD ALUMINUM INTRODUCED
First, Copper Clad Aluminum structures:
Copper clad aluminum wire shorthand for the CCA, it is aluminum core wire and close-coated aloof of a dual-layer copper wires, making a conduit to play in two of the characteristics of metal materials So that the excellent conductivity of copper and aluminum light weight combined with the characteristics, to overcome the shortcomings of the aluminum wire, forming a good electrical conductivity, density, flexibility, corrosion-resistant and easy to welding, and other characteristics of the low price of copper clad aluminum wire. Thus develop into a new metal conductive material.
Second, Copper Clad Aluminum characteristics:
1, the structural parameters
The volume of copper-lead can be divided into: 10% and 15% are copper-volume ratio to 15 per cent of the Copper Clad Aluminum mainly used for transmission of high-frequency signals in the coaxial cable conductor, a 10% Copper Clad Aluminum Mainly used for transmission of low-frequency current cable conductor.
By the weight of copper, copper layer can be calculated volume ratio of 10% and 15% of the Copper Clad Aluminum, copper-weight ratio was 26.8 percent and 36.8.
In addition, in accordance with its status can be divided into the use of soft-(A) and Hard (H) two.
2, physical properties
⑴ density
The copper-volume ratio to 15 per cent of the Copper Clad Aluminum, its density of 3.63 g / cm ³; and copper-volume ratio to 15 per cent of the Copper Clad Aluminum, its density of 3.32 g / cm ³.
Copper Clad Aluminum due to the density of small, Copper Clad Aluminum has many advantages:
① For the same weight and diameter of copper and copper-clad aluminum wire compared Copper Clad Aluminum is about the length of copper line of 1.7 to 2.5 times, and this will reduce the material cost manufacturers.
② As one tons of copper in the Copper Clad Aluminum weighs 268 ~ 368 Kg, can replace 1.7 to 2.5 tons of pure copper lines, making use of Copper Clad Aluminum can save a lot of copper resources.
⑵ heat (c)
According to thermodynamic formula Q = cm (t2-t1), due to the heat copper lines c = 0.092Kcal/kg.k, Copper Clad Aluminum's heat c = 0.149Kcal/kg.k, which means that copper package The aluminum heat than pure copper lines is much greater than the heat, then in the same weight of the Copper Clad Aluminum temperature rises one degree of heat required by the more than copper lines, so that is Copper Clad Aluminum A lower temperature, which the security of electricity be of great benefit.
⑶ conductivity
copper clad aluminum the resistance rate than copper lines, smaller than aluminum, 20 ℃ when the volume ratio was 10% and 15% of the Copper Clad Aluminum DC Resistance rates were ≤ 0.02743 Ω mm ² / m and ≤ 0.02676 Ω mm ² / m. Therefore, according to the International Electrotechnical provides industrial copper annealing at 20 ℃, the resistance rate is equal to 0.017241 Ω mm2 / m as the standard conductivity to 100% IACS, then Baolv the conductivity of copper for about 65% IACS.
⑷ tensile strength and elongation
Tensile strength and elongation of different diameter and is based on different, specific parameters can refer to the electronics industry standards "SJ/11223-2000 Copper Clad Aluminum."
3, Copper Clad Aluminum acceptance standards:
Copper is in accordance with the current copper clad aluminum SJ / T 11223-2000 Copper Clad Aluminum production and inspection standards, also ASTM B 566-93, such as the special requirements of customers, clients or by the requirements of the special method of production.
4, Copper Clad Aluminum areas of application:
☆ high-frequency signal transmission:
Sophie-RF coaxial cable; leaky cable, conductor; cable network within the conductor; micro-coaxial cable, conductor; coaxial cable within the first conductor material; 50 Ω RF cables, coaxial cables, RF Flexible Conductor;
☆ power transmission:
Braid; fuse material; power cable conductor; conductor wire cloth construction materials; bus conductor, and other materials; cars, motorcycles exclusive cable conductor materials, computer cables, control cables and other data cable, conductor; other areas: Audio , Video conductor; power line conductor; line computer peripherals, computer cable conductor material.
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