贵金属
貴金屬
귀금속
PRECIOUS METALS
2014年
4期
1-5
,共5页
金属材料%合金化原理%固溶度%米德玛键参数%溶解度方程
金屬材料%閤金化原理%固溶度%米德瑪鍵參數%溶解度方程
금속재료%합금화원리%고용도%미덕마건삼수%용해도방정
metal material%alloying principle%solid solubility%Miedema’s bond parameters%solubility equation
总结了周期表元素与Pd的相互作用,按富Pd合金的相图特征,采用经典合金化理论和米德玛键参数分析了固溶度的规律性。建立了周期表元素在 Pd 中的溶解度方程:lnCmax =4.6052–k(|?nws1/3|–nR),溶质在Pd溶剂中的极限固溶度(lnCmax)是Pd溶剂与溶质之间的电子密度差|?nws1/3|的减函数。当Pd溶剂与溶质之间的电子密度差|?nws1/3|相同时,简单金属溶质在Pd中的固溶度大于过渡金属溶质,简单金属和过渡金属溶质在 Pd 溶剂中具有不同的固溶机制。分析了惣各贵金属元素作为溶剂对周期表元素的溶解能力指数与溶质元素电子密度nws1/3的关系,Pd作为溶剂对周期表元素具有最大溶解能力。
總結瞭週期錶元素與Pd的相互作用,按富Pd閤金的相圖特徵,採用經典閤金化理論和米德瑪鍵參數分析瞭固溶度的規律性。建立瞭週期錶元素在 Pd 中的溶解度方程:lnCmax =4.6052–k(|?nws1/3|–nR),溶質在Pd溶劑中的極限固溶度(lnCmax)是Pd溶劑與溶質之間的電子密度差|?nws1/3|的減函數。噹Pd溶劑與溶質之間的電子密度差|?nws1/3|相同時,簡單金屬溶質在Pd中的固溶度大于過渡金屬溶質,簡單金屬和過渡金屬溶質在 Pd 溶劑中具有不同的固溶機製。分析瞭惣各貴金屬元素作為溶劑對週期錶元素的溶解能力指數與溶質元素電子密度nws1/3的關繫,Pd作為溶劑對週期錶元素具有最大溶解能力。
총결료주기표원소여Pd적상호작용,안부Pd합금적상도특정,채용경전합금화이론화미덕마건삼수분석료고용도적규률성。건립료주기표원소재 Pd 중적용해도방정:lnCmax =4.6052–k(|?nws1/3|–nR),용질재Pd용제중적겁한고용도(lnCmax)시Pd용제여용질지간적전자밀도차|?nws1/3|적감함수。당Pd용제여용질지간적전자밀도차|?nws1/3|상동시,간단금속용질재Pd중적고용도대우과도금속용질,간단금속화과도금속용질재 Pd 용제중구유불동적고용궤제。분석료총각귀금속원소작위용제대주기표원소적용해능력지수여용질원소전자밀도nws1/3적관계,Pd작위용제대주기표원소구유최대용해능력。
Some regularities of interactions of palladium with periodic table elements were summarized, and the solid solubilities of periodic table elements in palladium were analyzed by the classical solid solubility theory and Miedema’s bond parameters. A solubility equation, lnCmax=4.6052–k (|?nws1/3|–nR), was established, the limit solid solubility (lnCmax), of solutes in palladium increases with the electron density difference,|?nws1/3|, between them. The solid solubilities of the simple metal solutes in palladium are larger than those of transition metal solutes with same?nws1/3 based on different solubility mechanisms. The relationship of solvability ability indexes of precious metals as solvents with their electron density nws1/3 were analyzed by their electron density parameters nws1/3, and the palladium solvent has the largest solubility ability index for periodic table elements as solutes.