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采用金相，Ｘ射线衍射，电子探针微区分析和振动样品磁强计等诸技术对（Ｄｙ＿（０．６５）Ｔｂ＿（０．２５）Ｐｒ＿（０．１））＿２（Ｆｅ＿（１－ｘ）Ａｌ＿ｘ）＿（１７）赝二元化合物的结构、居里温度、磁化强度及磁致伸缩等进行了研究．结果表明，当ｘ＜０．１５时，（Ｄｙ＿（０．６５）Ｐｂ＿（０．２５）Ｐｒ＿（０．１））＿２（Ｆｅ＿（１－ｘ）Ａｌ＿ｘ）＿（１７）化合物具有Ｔｈ＿２Ｎｉ＿（１７）型六方结构；当ｘ＞０．２５时，转变为Ｔｈ＿２Ｚｎ＿（１７）型菱形结构；在０．１５≤ｘ≤０．２５区间，Ｔｈ＿２Ｎｉ＿（１７）型和Ｔｈ＿２Ｚｎ＿（１７）型结构并存．该化合物的居里温度在ｘ＝０．２４附近呈现出一极大值，而磁化强度却在ｘ＝０．２５时呈现出一极小值．磁致伸缩的测量表明，该化合物的磁致伸缩与磁场呈线性关系，添加少量的Ａｌ（ｘ＝０．１０）对其影响不大．
(Dy_ (0.65) Tb_ (0.25) Pr_ (0.1)) _2 (Fe_ (1- x) Al_x) _ (17) The structure, Curie temperature, magnetization and magnetostriction of pseudobinary compounds were studied. The results show that the compounds of Dy_ (0.65) Pb_ (0.25) Pr_ (0.1) __ (Fe_ (1-x) Al_x) _ (17) ) Hexagonal structure. When x> 0.25, it turns into a Th_2Zn_ (17) type diamond structure. In the range of 0.15≤x≤0.25, Th_2Ni_ (17) and Th_2Zn_ (17) structures coexist. The Curie temperature of this compound shows a maximum around x = 0.24, whereas the magnetization shows a minimum at x = 0.25. Magnetostrictive measurements show that the magnetostriction of the compound has a linear relationship with the magnetic field, adding a small amount of Al (x = 0.10) has little effect on it.