baoyu135国产精品免费_成人精品视频一级毛片_亚洲中字无码A∨电影在线观看_国产免费高潮白浆二区三区_免费视频在线观看高清无码_精品无码久久国产2024_亚洲AV无码专区牛牛影院_精品第一国产综合精品aⅴ_午夜大片爽爽爽免费影院_日本在线高清视频

Tungsten Wire

As a typical tungsten product, tungsten wire is a fine filament made by forging and drawing tungsten rods, known in English as tungsten wire, with a tungsten content generally exceeding 99.95%. However, due to the high hardness and brittleness of metallic tungsten, which makes processing difficult, small amounts of potassium oxide, silicon oxide, and aluminum oxide are often added during production. The resulting modified tungsten wire is commonly referred to as doped tungsten wire, 218 tungsten wire, or non-sagging tungsten wire, offering superior overall performance compared to pure tungsten wire.

Image of tungsten wire

In terms of physicochemical properties, tungsten wire is characterized by a high melting point, high density, high strength, high electrical resistivity, low vapor pressure, slow evaporation rate, high-temperature resistance, wear resistance, impact resistance, and acid-alkali resistance. Notably, it can be categorized into black tungsten wire and white tungsten wire based on color; into straight twisted fine wire, twisted fine wire, and spiral fine wire based on shape; and into coarse tungsten wire and fine tungsten wire based on size.

Image of tungsten wire

Regarding production processes, the preparation of doped tungsten wire involves: first mixing ammonium paratungstate, potassium silicate, aluminum nitrate, potassium hydroxide, and hydrochloric acid solution; then spray-drying the mixture, reducing the resulting powder with hydrogen to produce doped tungsten powder; and finally processing it through molding, vertical melting, rotary forging, and drawing to obtain the desired product.

In terms of applications, tungsten wire is used in lighting, semiconductor, and photovoltaic fields. In lighting, it primarily serves as the filament for incandescent lamps and halogen tungsten lamps. Note: The filament is shaped into a spiral primarily to maximize its length while keeping resistance low, thereby enhancing the bulb’s brightness and lifespan.

Comments are closed.

Address: 3F, No.25-1 WH Rd., Xiamen Software Park Ⅱ, FJ 361008,China Copyright ? 1997 - 2025 CTIA All Rights Reserved
Phone:+86-592-5129696,+86-592-5129595;    Email: sales@chinatungsten.com
舊版