Superplasticizer used in concrete refers to the fact that after mixing, it can reduce the water demand of concrete under the condition of maintaining basically the same fluidity, thereby improving the strength and durability of concrete, or under the…
The oxidation resistance and corrosion resistance of nickel alloy make it suitable for the harsh environment of high temperature and high pressure.…
Aluminum nitride is synthesized by carbothermal reduction of alumina or by direct nitridation of aluminum. Aluminum nitride density is 3.26g/cm3. Although it does not melt, it decomposes above 2500°C at atmospheric pressure.Aluminum nitride is co…
Russia and Ukraine is an important exporters of oil, natural gas, metals, fertilizers, rare gases and other industrial raw materials. Affected by the further intensification of the tension of the war, the global market has become more worried about t…