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按照由刘与郑于１９９１年所叙述的以直接测量高角区衍射峰为基础的新技术：α＿（ｍｅａｓｕｒｅ）＝［－ｃｏｔ（２θ＿１／２）」（２θ＿２－２θ＿１）／２（ｔ＿２－ｔ＿１），这里的θ＿１与θ＿２分别为温度ｔ＿１与ｔ＿２时所测得的布拉格角，本文逐项地介绍了新技术的实施步骤与注意事项。
According to a new technique based on the direct measurement of high-angle region diffraction peaks described by Liu and Zheng in 1991: α measure = [- cot (2θ_1 / 2) "(2θ_2-2θ_1) / 2 (t_2 -t_1) , Where θ_1 and θ_2 are the Bragg angles measured at temperatures t_1 and t_2, respectively. This article introduces the implementation steps and precautions of the new technology item by item.