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Mica heating film heating element (MICA ELEMENT) Technology I

时间:2014-11-28 11:34来源:未知 作者:admin 点击:
Home heating in the family, the use of electric film heater mica heating film, has swept the overseas market for many years, has been much consumers love. For this type of heater, its heart is the electric film mica heating element can also
  Home heating in the "family", the use of electric film heater mica heating film, has swept the overseas market for many years, has been much consumers love. For this type of heater, its heart is the electric film mica heating element can also be called the core technology. What electric film Mica fever tablets exactly? And what classification? The following highlights.
 
  In fact, because the heater sought after by the market, the world face should also be shipped spawned a variety of electric film mica heating film, heating elements are various manufacturers dubbed "Mica heating film heating film," resulting in a good and bad, the situation of fish to consumers and manufacturers to bring the finished application somewhat misleading, and even cause some of the electric membrane technology misunderstanding
 
  1) wound alloy heating wire electric film
 
  Since the 1893 inception, has been widely used so far, is more traditional heating methods. Because electric wire is linear heat, heat the smaller, three-dimensional diffusion of heat radiation wave was, some energy is converted into light, is a strong fire. According to the law of conservation of energy, the energy conversion efficiency of only 60% -70%. Temperature up to 1100 ℃, electric wire easily broken, poor seismic performance.
 
  Electric wire is used pressure, extension, pull, stretch way into electric wire, electric rods, electric plates, heaters, etc., but not arbitrarily cut power use. Electric wire production technology is very mature, supporting the production of household appliances, mostly low-end products, low competitiveness. Some electric wire supporting household appliances, has been difficult to enter the high-end European and American markets.
 
  (2) Carbon heating plate mica
 
  Belong to the same category of electric carbon film heating film organic opaque. Constitutes an organic polymer electric membrane electric film and add another type of electric film. At present, more practical application is added to the film-forming substances, carbon black, graphite, or both mixed use, commonly known as black film. The film screen printing process to coat and commonly used. Film and use most of the needs of electric film carrier, the application of more carrier material is glass, ceramic and mica.
 
  Carbon Mica heating plate has the following disadvantages:
 
  1. Physical safety performance risks. Since the production process is the black film coating, and screen printing of the insulating surface of the substrate, so in the thickest electric film is a kind of thickness of 0.3-0.5 mm. Since the film layer and the mica layer after different thermal expansion coefficients, after repeated heating and cooling, the final substrate between the film and the mica bubble layer is formed, resulting in the film easily.
 
  2. The power density can not be bigger, the whole cost of the high cost. Monolithic power density is generally at 0.5W per square cm below the surface temperature can reach 200 degrees or less, which requires manufacturers to make high-power heater when the appearance of size have to do a lot to increase the cost.
 
  3. tin oxide electric film heating plate mica
 
  Conductive tin oxide film is a sintered composite conductive coating and surface coating processing, and in the gas phase, the tin oxide and the composite sintered at high temperature treatment from spattering.
 
  Tin oxide film mica electric heating plate 1. Because it is and cloud motherboard tin oxide sintering, the current flowing through the tin oxide layer and the heat, but the nature of mica flakes of mica fine crystal structure is glued together, between the structure is not are tight, low ductility and toughness, a certain loose, especially with the constant expansion and contraction, will form a slight gap between the mica fine crystal structure, these slight gap on the current flow is a major obstacle, a direct result of burnout .

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