利用X射线衍射仪,采用全谱拟含的方法,测定三种不同碳材料的点阵常数、石墨化度及微晶参数,测得三种碳材料(每个样品重复5次试验)六方晶系的a的标准偏差小于2.0×10~(-3),c的标准偏差小于1.4×10~(-3),石墨化度(g)的标准偏差小于1.5,微晶参数(L_(c002))的标准偏差小于0.5,是一种有效的测试碳材料晶体参数的方法.
Graphitization degree, lattice constant and crystallite sizes of three kinds of C/C composites were measured by rietveld refinement method ( whole spectrum fitting) of X-ray diffraction. The results show that standard deviation of crystal the parameter of the three C/C composites is less than 2.0 × 10~(-3), standard deviation of graphitization degree (g) is less than 1.5, standard deviation of crystallite sizes( L_(c002)) is less than 0.5. Rietveld refinement method of X-ray diffraction is effective for investigation of the crystal parameters of C/C composite.
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