The environmental issues and health effects by nitrogen oxides (NOx) had caught more attentions in the past decade.  The main source of NOx resulting from human activities is the burning of fossil fuels (coal, gas and oil) especially gasoline used in cars. V2O5-WO3-TiO2 is the most common catalysts applied in industrial field for NOx reduction. Unfortunately, the toxicity of V2O5 limits the applications in some fields. Ce-based (Cerium) catalysts, which exhibit remarkable redox properties and high oxygen storage capacity, have attracted much attention in the NH3-SCR reaction.

The crystallization of ammonium paratungstate (APT) from aqueous ammonium tungstate solutions is a key unit operation in the current production of tungsten powder. The crystal size, crystal size distribution, and degree of agglomeration of ammonium paratungstate tetrahydrate, (NH4)10[H2W12042] ·4H20, (APT·4H20) are all likely to be of importance for its processing to tungsten powder. Both batch and continuous crystallizers are used in industrial practice.

Tungsten (W) alloys has been applied in high temperature resistant materials for decades due to its amazing thermal resistance and toughness. W alloys have been applied in plasma-facing materials, solid target in spallation neutron source, electrical contacts, and fuel elements in rockets, etc. These applications have a requirement on higher mechanical properties and higher temperature stability.

Trimethylamine is a hazardous volatile organic compound that originates from spoiled fishes and sea creatures and has negative effects on air quality and human health. The gas sensing materials based on metal oxide semiconductors have attracted considerable attention due to the advantages on high sensitivity, low-cost synthesis route and compatible with micro-electronic manufacturing technology.

White light-emitting diodes (LEDs) are considered as next generation lighting devices and gained promising attention because of their attractive advantages such as small size, long reliability, low energy consumption, high luminescent efficiency and eco-friendly nature over the conventional incandescent and fluorescent lamps. A technique which combines UV LED and tri-color (Red, Green, Blue) phosphors is a solution to achieve a better display. The combination produces bright white light with high color rendering index and low correlated color temperature. unfortunately, the performance of red phosphor is much weaker than the performance of blue and green phosphors.

Solid acid catalysts (SACs) have a widely and valuable industrial applications such as petroleum, biodiesel, and chemical industries. SACS are considered as the most important categories of catalysts that serve the petroleum industry. Thus, SACs promote environmentally benign heterogeneous catalysts that assist wide industrial applications.

There are four preparation methods of tungsten alloy balls, namely compression molding, disc pelletizing, squeeze-cut rotation and injection molding.

The low-temperature ductility of the tungsten wire is the main factor affecting the winding performance. The main influencing factors are the purity of raw materials, additives and the surface condition of the wire.

Molybdenum (Mo) and molybdenum alloy materials have wide applications in the manufacturing industry, aerospace industry, steel smelting, petrochemical industry, medical devices, national defense construction and other industrial fields. In the field of medicine, the most widely known and closely relevant to our lives is molybdenum target.

With the development of science and technology, molybdenum shows its advantages in many fields, which has changed human life in various aspects, one of the familiar applications is to manufacture liquid crystal display. Large-size high purity molybdenum sputtering target is the key raw material in the producing of LCD panel, and Mo is one of the preferred materials for sputtering target of LCD panel. This kind of target is used in the daily color TV, intelligent phone, tablet computer and some large household appliances, as well as the control screens of some military communication equipment and other electronic products.