The bulk density of ammonium metatungstate (AMT) refers to the mass per unit volume of AMT powder in its naturally piled state, typically measured in g/cm³ or kg/m³. The term "natural piling" emphasizes that the powder is not compacted by external force but settles freely into a container under gravity, reflecting microstructural features such as porosity between particles, particle shape, particle size distribution, and surface roughness.

The thermal shock resistance of barium tungsten electrodes is affected by many factors. The following is an analysis of the main influencing factors:

Ammonium metatungstate (AMT), a typical transition metal compound, appears as a white crystalline powder or slightly yellowish powder, with the molecular formula H28N6O41W12 and a density of 2.3-2.8 g/cm³. It has a wide range of applications. In the field of catalysis, AMT excels as a catalyst and support for reactions like hydrogenation and dehydrogenation in petrochemical processes. In functional materials, it is used to prepare tungsten-based energy storage materials and electrochromic materials. AMT is also utilized in producing ultrafine tungsten powder, tungsten alloys, as well as serving as an analytical reagent and an additive in ceramic materials.

The thermal conductivity of barium tungsten electrode is affected by the combined effect of multiple factors, involving multiple aspects such as material science, thermodynamics and preparation process.