Recently, China's newly developed TMH20/15MN large radial precision forging machine was successfully tested at one heat load, and the first qualified high-end bar was forged. The successful test of the radial precision forging machine marks that the core manufacturing equipment of high-end pipe in China will no longer be easily "card neck"! However, this also means that China has successfully broken one of the technical barriers that have long been completely monopolized by foreign countries - large radial precision forging machine preparation technology!

Tungsten trioxide (WO₃) is a typical n-type semiconductor material, which has broad application prospects in electrochromic devices, gas sensors and photocatalysts. Particularly in the field of photocatalysis, WO₃ has a narrow band gap (2.4-2.8eV) compared with other semiconductors (such as titanium dioxide and Bi₂O₃), which can utilize solar energy more effectively.

potassium containing tungsten bars are raw materials for making light source materials, high-temperature heaters and high-temperature resistant components. The traditional production method is to add silicon, aluminium, potassium and other elements into tungsten oxide powder first, then reduce the tungsten oxide powder doped with these elements and wash it with hydrochloric acid and hydrofluoric acid to obtain doped tungsten powder, then doped tungsten powder. After being pressed, the strips are sintered and sintered to obtain potassium containing tungsten bars.

Scanning Tunneling Microscope (STM) is an instrument for detecting various surface information with atomic spatial resolution. The structure of the probe tip is one of the main factors determining the performance of the instrument. For example, the size, shape and chemical purity of the tip will affect the electron density of states of the atoms on the surface of the material under test, and the image of the STM. It has important influence on the resolution and quality.