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石蜡 - Wikipedia

石蜡

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化学中,石蜡是固态高级烷烃混合物的俗名,分子式为CnH2n+2,其中n=20-40。

石蜡通常是白色、无色无味的蜡状固体,熔点在47°C-64°C,密度约0.9 g/cm3[1]。它不溶于水,但可溶于和某些中。石蜡不与常见的化学试剂反应,但可以燃烧。

纯石蜡是很好的绝缘体,其电阻率为1013-1017欧姆·米[2],比除某些塑料(尤其是特富龙)外的大多数材料都要高。

石蜡也是很好的储热材料,其比热容为2.14–2.9 J·g–1·K–1熔化热为200–220 J·g–1[3]

石蜡是蜡烛的主要成分。

[编辑] 参见

  • 液体石蜡
  • 石蜡油

[编辑] 参考资料

  1. ^ Kaye, George William Clarkson; Laby,Thomas Howell. Mechanical properties of materials. Kaye and Laby Tables of Physical and Chemical Constants. National Physical Laboratory. Retrieved on 2008-03-06.
  2. ^ Electrical insulating materials. Kaye and Laby Tables of Physical and Chemical Constants. National Physical Laboratory (1995). Retrieved on 2007-04-23.
  3. ^ Specific Heat Capacity. Diracdelta.co.uk Science and Engineering Encyclopedia. Dirac Delta Consultants Ltd, Warwick, England. Retrieved on 2007-08-18.


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