Basic Mechanical and Thermal Properties of Silicon
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چکیده
A Introduction This paper outlines some of the basic mechanical and thermal properties of silicon. B Crystalline Structure and Elastic Properties Three values for the lattice parameter of pure Silicon at 22.500 °C are given below. The values were determined in independent studies through X-ray and optical interferometry (XROI). a= 543102.032 +/0.033 fm [2] a= 543102.044 +/0.017 fm [3] a= 543101.99 +/0.09 fm [4] The value of the linear thermal expansion coefficient (α(T)) is given by the following expression: α(T) = (3.725{1exp[-5.88 x 10 (T – 124)]} + 5.548 x 10T) x 10 K [1] where T is the absolute temperature expressed in Kelvin and valid for values of T between 120 K and 1500 K. At 25.0 °C the recommended value is α298.2 = (2.59 +/0.05) x 10 K The lattice parameter at T K is given by
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