Tungsten

Information
Barium Tungsten Electrode: A New Lighting Engine 18

In the journey of human beings to pursue light, every breakthrough in materials science is like a beacon, illuminating the road of technological evolution. Barium tungsten electrode, an innovative material that combines the toughness of tungsten with the activity of barium, is reshaping the pattern of modern lighting technology. From urban roads to operating table shadowless lamps, from Hollywood studios to stadiums, barium tungsten electrodes have become the key force to light up the future vision with their unique physical…

Information
Ferrous Tungstate 25

Like cobalt tungstate (CoWO?) and nickel tungstate (NiWO?), ferrous tungstate is an inorganic compound composed of a transition metal, a Group VIII element, and a non-metal element, exhibiting excellent physicochemical properties and wide applications in the chemical industry. Note: Iron, cobalt, and nickel, known as iron-series elements, are all from the fourth period and Group VIII, with atomic numbers 26, 27, and 28, respectively. Their properties are similar, and they all display ferromagnetism. Ferrous tungstate is a material composed of…

Information
What Is Tungsten Crucible? 27

Tungsten crucible is a high-temperature resistant vessel made from high-purity tungsten powder (tungsten content >99.95%) through precise powder metallurgy and forming techniques. It maintains structural integrity and functional stability even in high-temperature environments, with its technological level influencing the precision of cutting-edge processes in fields like high-end crystal growth and special material smelting. The excellent properties of tungsten crucible stem from the intrinsic attributes of tungsten and optimized microstructure. Tungsten boasts a melting point of 3,410°C, a boiling point of…

Information
What Is Silicotungstic Acid? 23

Silicotungstic acid, a key member of the polyoxometalate family, showcases significant application potential in materials science, chemical engineering, and biomedicine due to its unique molecular structure and excellent chemical properties. It is an inorganic compound composed of tungsten, silicon, hydrogen, and oxygen, with the molecular formula H?[Si(W?O??)?]·nH?O and CAS number 12027-38-2. Silicotungstic acid belongs to the Keggin-type polyoxometalates, with its core structure consisting of 12 tungsten-oxygen octahedra (WO?) surrounding a central silicon-oxygen tetrahedron (SiO?), forming a highly symmetrical cage-like anion…

Information
What Is Tungsten Niobium Alloy? 31

In the field of advanced materials, tungsten niobium alloy, a typical refractory metal composite, is gaining prominence as a critical foundational material in strategic sectors such as aerospace and high-end equipment manufacturing. This two-phase alloy system, composed of tungsten and niobium, achieves a complementary balance of tungsten’s high melting point and strength with niobium’s excellent ductility and corrosion resistance through elemental ratio control and microstructural design. Known as Tungsten Niobium Alloy or Niobium Tungsten Alloy, it demonstrates irreplaceable value in…

Information
Coefficient of Thermal Expansion and Design Optimization of Tungsten Crucible 30

Tungsten crucibles operating in high-temperature environments must have good thermal stability and thermomechanical compatibility, especially when used with other structural materials (such as graphite, ceramic, quartz glass), and its coefficient of thermal expansion (CTE) becomes a key factor in the design and use process. The coefficient of thermal expansion of tungsten in the range of room temperature to 2500°C is roughly between 4.5 × 10??/K and 5.5 × 10??/K, which is much lower than that of general metals such as…

Information
Testing and analysis of mechanical properties of tungsten crucible 19

As an important refractory metal product in the field of high temperature, tungsten crucible plays a key role in the fields of metallurgy, semiconductor, aerospace and nuclear energy. In order to ensure its reliability and safety in extreme environments, it is particularly important to test and analyze the mechanical properties of the system. The mechanical properties of W crucible not only determine its structural stability during use, but also directly affect its thermal shock resistance, crack propagation resistance and long-term…

Information
Application of Tungsten Crucible in the Preparation of Superalloys 23

Superalloy is a kind of alloy material that can maintain excellent mechanical properties and corrosion resistance in a high-temperature environment, and is widely used in aerospace, gas turbine, nuclear energy equipment and other fields. Due to the generally high melting point of superalloys, some even exceeding 1500 °C, the preparation process puts forward extremely strict requirements for the high temperature resistance, chemical stability and structural strength of the container material. Tungsten crucible, as one of the most commonly used ultra-high…

Information
Relationship Between Microstructure and Properties of Tungsten Crucible 20

Although tungsten has excellent material properties as a high melting point metal, its actual performance in high temperature and extreme environments is also profoundly affected by the microstructure of the material. Therefore, it is of great significance to study the relationship between the microstructure and its properties of tungsten crucible to improve its overall reliability and life. First, microstructure characteristics of W crucible W crucibles are usually manufactured by powder metallurgy process, and their microstructure mainly includes grain morphology, grain…

Information
Corrosion Resistance of Tungsten Crucible and Improvement Methods 13

In some special high-temperature atmospheres or melt environments, tungsten crucibles still face a certain degree of corrosion problems. Corrosion not only affects the service life of the crucible, but can also contaminate the material being treated and reduce product quality. Therefore, improving the corrosion resistance of the crucible is the key to improving its comprehensive performance and prolonging the service life. In this paper, the corrosion mechanism, influencing factors and main improvement methods are systematically analyzed and discussed. 1. The…

1 … 11 12 13 14 15 … 358