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本文提出的Ｊ值法是一种新的Ｘ射线衍射物相定量法．每次测量需配制由两个混合试样组成的试样系．在两个混合试样中，参考物质及待测相的衍射峰总共有四个．它们之间强度的比值即为Ｊ值．在样品条件固定时，Ｊ值只与待测相在待测试样中的含量百分数有关．本方法吸取了Ｋ值法及增量法的优点，并可对两个混合试样的配比量进行优选，使测量在最佳条件下进行．织构及微吸收效应会使强度的测量值发生偏差，其它方法必须对强度作一些修正，而本方法的主要特点是可以避免这些修正．Ｋ值法是本方法的一个特例．两次验证的结果表明．本方法相当准确．
The proposed J-value method is a new phase-by-phase method for X-ray diffraction. Each measurement requires the preparation of a sample line consisting of two mixed samples. In both mixed samples, there are four diffraction peaks for the reference material and the phase to be measured. The intensity ratio between them is J value. When sample conditions are fixed, the value of J is only related to the percentage content of the test phase in the test sample. The method draws on the K value method and the advantages of incremental method, and the ratio of the two mixed samples were optimized, the measurement under the best conditions. The effects of texture and microabsorption can deviate the measured values of strength. Other methods must make some corrections to the strength, and the main feature of this method is that these corrections can be avoided. K value method is a special case of this method. The result of two verifications shows. This method is quite accurate.