Improving the Quality of Thermocouple Wire Made of Platinum-rhodium Alloys  

作　　者：HORIKOV P. A. MAMONOV S. N. EFIMOV V. N. RADKIN A. N. DROZDOV D. E. 

机构地区：[1]JSC "Krastsvetmet", Krasnoyarsk, Russia

出　　处：《贵金属》2012年第A01期102-103,共2页Precious Metals

摘　　要：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.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 platinumrhodium 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.

关 键 词：THERMOCOUPLE thermocouple wire platinum-rhodium alloy INHOMOGENEITY CRYSTALLIZATION liquation phase 

分 类 号：TG146.3[一般工业技术—材料科学与工程]