贵金属
貴金屬
귀금속
PRECIOUS METALS
2012年
z1期
102-103
,共2页
HORIKOV P.A.%MAMONOV S.N.%EFIMOV V.N.%RADKIN A.N.%DROZDOV D.E.
HORIKOV P.A.%MAMONOV S.N.%EFIMOV V.N.%RADKIN A.N.%DROZDOV D.E.
HORIKOV P.A.%MAMONOV S.N.%EFIMOV V.N.%RADKIN A.N.%DROZDOV D.E.
thermocouple%thermocouple wire%platinum-rhodium alloy%inhomogeneity%crystallization%liquation phase
For the manufacture of S-type thermocouple the so-called thermocouple wire of platinum and platinum-rhodium alloy is used.One of the main technical requirements for the quality of the wire,according to State Standard of Russia (GOST 10821),is the uniformity of its largest thermoelectric force (Thermo-emf) in the length different sections.It was found that a determining impact on the uniformity of the wire thermo-emf is the distribution of rhodium along the length of the wire.The impact of platinum- rhodium melt crystallization conditions on the inhomogeneity of wire manufactured from it.It was suggested that the chemical inhomogeneity of the wire is related to the liquation phase of platinum-rhodium alloy.
