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一、前言在稀土元素中,镥的特性比较突出。例如金属镥的原子半径最小(1.734(?)),比重最大(9.842克/厘米~3,熔点最高(1663℃)镥原子的4f电子层又处于全满状态,故镥比其它稀土元素稳定。金属镥可做成镥铝探测片,用 于核反应堆的中子探测;用铼镥合金制成的铼镥热电偶,它的抗氧化性能及使用寿命均高于铂铑热电偶;镥还可做荧光粉激活剂、钇铁或钇铝石榴石添加剂及用于活化分析;镥和硅锗的化合物可做成低温下的超导材料。
First, the preface In the rare earth elements, the characteristics of 比 more prominent. For example, metal 镥 atomic radius minimum (1.734 (?)), The largest proportion (9.842 g / cm3, the highest melting point of 1663? 4 atomic 4f electron layer and full state, so 镥 than other rare earth elements stable. Metal 镥 can be made of 探 aluminum probe for the neutron detection of nuclear reactors; rhenium 镥 alloy made of rhenium 镥 thermocouple, its oxidation resistance and service life are higher than the platinum rhodium thermocouple; 镥 can also be done Phosphor activator, yttrium iron or yttrium aluminum garnet additives and used for activation analysis; 镥 and silicon germanium compounds can be made of superconducting materials at low temperatures.