论文部分内容阅读
钨元素由瑞典化学家舍勒(C.W.Scheele)于1781年从当时称为重石的矿物(现称白钨矿)中发现的,并以瑞典文tung(重)和sten(石头)的复合词tungsten命名这种新元素。1783年西班牙人德卢亚尔兄弟(F·de Elhuyar)从黑钨矿中制得氧化钨,并用碳还原为钨粉。钨呈银白色,是熔点最高的金属,熔点高达3400℃,居所有金属之首,沸点5555℃,比重(单晶钨)19.3,并具有高硬度、良好的高温强度和导电、传热
The tungsten element was discovered by the Swedish chemist CWScheele in 1781 from what was then called heavy rock (now known as scheelite) and is named after the compound word tungsten in Swedish tung and sten This new element. In 1783 F. de Elhuyar, a Spanishman, made tungsten oxide from wolframite and reduced it to tungsten powder with carbon. Tungsten is silver white, is the highest melting point of the metal, melting point up to 3400 ℃, ranking first in all metals, the boiling point of 5555 ℃, the proportion of (single crystal tungsten) 19.3, and has high hardness, good high temperature strength and conductivity, heat transfer