Ammonium paratungstate is an important material for preparing ammonium metatungstate by a thermal decomposition - resin exchange method. This method overcomes the problems of some traditional processes such as APT - tungstic acid method, APT - acidification - alcohol precipitation method, and APT thermal decomposition - alcoholization crystallization method, etc. It has the advantages of simple process, high single pass yield and excellent product quality.

What is the solubility of ammonium paratungstate? The more common question is - "Is ammonium paratungstate soluble in water?" or "Is APT soluble in water?"

Ammonium paratungstate application is always the focus as it is an important intermediate for producing different tungsten products. Ammonium paratungstate (APT) is mainly used for the preparation of tungsten trioxide (WO3), blue tungsten oxide (W20O58/WO2.9) or metal tungsten powder.

Coarse crystalized ammonium paratungstate (APT) is a flaky or needle-like white crystal that is slightly soluble in water and insoluble in alcohol. As a raw material for the powder metallurgy industry, coarse crystalized APT has the characteristics of simple production process, high purity, high bulk density, good fluidity, and easy storage and transportation.

Ultrafine ammonium paratungstate is an important raw material for the production of nano tungsten powder. Since the 1990s, nano tungsten powder has been generally concerned by researchers all over the world, and ultrafine APT, as an important raw material for preparation of W powder, is also receiving much attention.

What is ammonium paratungstate? Ammonium paratungstate, APT for short, is white, finely divided crystals, with the chemical formula (NH4)10(W12O41) · 5H2O. It is soluble in water and insoluble in alcohol. It is produced by evaporation of purified ammonium tungstate solution to obtain pure paratungstate crystals. Controls of time, temperature, concentration, and pH, determine the quality and physical characteristics of the APT crystals.

Tungsten carbide cutter blade is three times stiffer than the steel commonly used on other types of wood-cutting tools. Tungsten carbide enables blades to cut faster without binding, which reduces load on woodworking machines. Sharp, carbide-tipped tools are far more efficient, cutting faster and needing sharpening less often than common steel blades.

Production process of tungsten carbide blade is the focus of researchers as it greatly affects the quality of blades. Production processes of tungsten carbide blades include powder production, powder compacting, high temperature sintering, blade grinding and other processes.

Tungsten carbide thread-cutting tool, or tungsten carbide thread cutting blade, is manufactured from high quality material with high hardness of and durability, and is often mounted on a lathe tool (turning tool). There are tungsten carbide external thread cutting tool and tungsten carbide internal thread cutting tool. With good machining performance, they can guarantee the machining accuracy and thread quality.

Tungsten carbide non-standard blade has been widely used in cutting paper, carton, rubber, plastic, aluminum foil, packaging materials, film, chemical fiber, textile, etc. They have different shapes and different uses.