The growth of sapphire crystals requires high temperatures and a clean environment, making molybdenum sheet, with its unique physicochemical properties, an indispensable key material in sapphire crystal growth furnaces.

Molybdenum sheet is a sheet-like material made from molybdenum metal through processes such as rolling. It is primarily used to produce reflective screens and covers in sapphire crystal growth furnaces, reflective screens, heating elements, and connectors in vacuum furnaces, as well as sputtering targets for plasma coating. It is a critical material in high-end manufacturing. The basic characteristics of molybdenum sheet are as follows:

Molybdenum sheet is characterized by a high melting point, good thermal stability, strong corrosion resistance, strong oxidation resistance, and excellent thermal and electrical conductivity, making it widely used in high-end fields such as aerospace, semiconductors, and energy chemicals.

Purple tungsten oxide, also known as tungsten purple oxide, is a typical tungsten oxide and an inorganic compound composed of 18 tungsten atoms and 49 oxygen atoms. It is an oxygen-vacancy tungsten oxide, appearing as a purple or blue-purple fine crystalline powder. Its English name is Purple Tungsten Oxide or Violet Tungsten Oxide (abbreviated as VTO or TVO), with a chemical formula of W₁₈O₄₉ or WO₂.₇₂ and a molecular weight of 227.36. Note: The oxidation state of tungsten in W₁₈O₄₉ is +5 or +6.