For billionaires, the new crown epidemic is like a 'gold rush'! The Deutsche Presse-Agentur said on the 17th that in 2022, the wealth held by the world's top ten richest people will jump from $700 billion to $1.5 trillion, an average daily increase o…
HPMC hydroxypropyl methylcellulose is a white powder that swells into a clear or slightly cloudy colloidal solution in cold water. Hydroxypropyl methylcellulose has the properties of thickening, binding, dispersing, emulsifying, film-forming, suspend…
At first, concrete additives were used only to save cement. With the development of construction technology, admixture has become the main measure to improve the performance of concrete.…
Ta4HfC5, which has a melting point of 4215 ℃. is made of hafnium carbide and tantalum carbide (melting point of nearly 4000 ℃), which have a higher melting point than tungsten.…