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• #12021 mr_ricsi veterán Lompos48 #12017

  Új Válasz 2012-01-28 23:00:19 #12021

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  mr_ricsi

  veterán

  válasz Lompos48 #12017 üzenetére

  Ha már a wikipédiából idézel, akkor azt a részt sem lenne szabad elhallgatnod, ami nem azt mutatja, hogy a ZnO-ot csak tornacipőkhöz használják:
  "Thermal greases use one or more different thermally conductive substances:

  Ceramic-based thermal grease has generally good thermal conductivity and is usually composed of a ceramic powder suspended in a liquid or gelatinous silicone compound, which may be described as 'silicone paste' or 'silicone thermal compound'. The most commonly used ceramics and their thermal conductivities (in units of W/(m ·K)) are:[4] beryllium oxide (218), aluminum nitride (170), aluminum oxide (39), zinc oxide (21), and silicon dioxide (1). Thermal grease is usually white in colour since these ceramics are all white in powder form. These figures are for bulk material, not thermal grease.
  Metal-based thermal grease contain solid metal particles (usually silver or aluminum). It has a better thermal conductivity[citation needed] and is more expensive than ceramic-based grease.
  Carbon based. There are products based on with carbon-based conductors, using diamond powder,[5][6][7] or short carbon fibers [1], they have the best thermal conductivity[citation needed] and are generally more expensive than metal-based thermal grease.
  Liquid metal based. Some thermal pastes are made of liquid metal alloys of gallium. These are rare and expensive.
  Phase Change Metal Alloy (PCMA) is not a "grease" but another type of Thermal interface material. The design consists of a sealed alloy metal pad that needs to be "reflowed" under high heat (typically 90-100C.) The alloy on the inside of the seal will change phases, and fill all the micro-voids. Since this material is made of mostly metal alloy, the thermal properties of this interface material are very good."
  forrás: [link]

  És még egy link:[link]
  Meg egy Biztonsági adatlap, amely szerint nincs is a ZnO-on kívül más oxid a termékben.
  [Ez] pedig még egy, ami szerint 60-80% a ZnO aránya a termékben.

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