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High-purity tungsten target is mainly prepared by hot pressing, hot isostatic pressing and so on. And tungsten target with high purity and high density may be prepared by intermediate frequency sintering and pressure processing, but its grain size and grain homogeneity are not very well compared with the tungsten target produced by hot isostatic pressing. High purity tungsten target has the characteristics of high temperature stability, high electron transfer resistance and high electron emission coefficient so that it is widely…

Tungsten target is often applied as sputtering target for physical vapor deposition. For example, it is used in the semiconductor field to make gate electrode, diffusion barrier, and the like. And the target of tungsten metal is being largely used by manufacturers of X-ray tubes. The tungsten is in the form of a thick button brazed into a solid block of copper, in some cases weighing as much as half a pound; this forms a lasting and efficient target, even…

Tungsten point, also known as tungsten contact, is often used as an electrical contact. It is for use in high voltage applications. Tungsten point is widely used in relays, which generally refers to a device that provides an electrical connection between two or more points in response to the application of a control signal. The user’s requirements for tungsten contact are shown as follows: 1. High hardness, good impact toughness; 2. No cracks and no scratches with smooth surface; 3.…

Tungsten foil may be prepared by electropolishing in sulfuric acid-methanol for equation of state (EOS) target. The tungsten foil may be prepared with high surface quality (RMS roughness less than 50nm) and thickness uniformity beyond 99%, and may keep the density of raw materials so that this foil can satisfy the requirement of laser driven materials for the research of high temperature and pressure EOS. Thus, electropolishing is a significant method for preparing the foil which can fulfill the requirement…

Tungsten sheet is obtained by the following processes: Isostatic pressing and high-temperature sintering of tungsten powder to obtain tungsten blank; rolling the blank and then cutting it through a shearing machine to obtain tungsten sheet. In general, tungsten sheet with a thickness of less than 0.3mm is thin tungsten sheet. With the development of electric vacuum technology, thin tungsten sheet with a roughness of less than 0.2μm and in a mirror bright state is in great demand in recent years.…