置换原子，是指占据基体原子平衡位置的异类的原子。所研究晶体晶格上基体原子和异类原子的交换使得某B原子置换溶解到某A的晶格中，这种B原子叫做置换原子。
系统研究了填充原子的种类、填充方式以及置换原子的种类对晶格热导率及热电性能的影响。
The effects of the kinds of filling and replacement atoms and the form of filling on the lattice thermal conductivity and thermo-electric property were discussed in this paper.
例如有机锡的稳定剂可以和羧甲基纤维素分子的不稳定氯原子配位结合，有机锡和不稳定的氯原子发生置换反应。
For example, the stabilizer of organotin compounds can be combined with the unstable chlorine atom of the carboxymethyl cellulose molecule, and the organotin and unstable chlorine atoms are replaced.
方法：用原子吸收分光光度法测定血液滤过置换液中总钠含量，并根据《测量不确定度评定与表示》（JJF1059-1999）中有关规定评估其不确定度。
Methods:To determinate the total sodium in hemofiltration replacement fluid by atomic absorption spectrophotometry and appraise the uncertainty according to JJF1059-1999.
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