Boron nitride is a crystal composed of nitrogen atoms and boron atoms.The chemical composition is43.6%boron and56.4%nitrogen,with four different variants:hexagonal boron nitride,rhombohedral boron nitride,cubic nitride Boron,and wurtzite boron nitrid
Lithium stearate is a white powdery compound with the chemical formula LiC18H35O2, also known as lithium octadecanoate and lithium octadecanoate.
Concrete is classified as high-strength concrete based on 28-day strength. Until the 1970s, concrete with a strength of more than 40Mpa was classified as high-strength concrete.
Metal 3D printing is a 3D printing technology that uses metal powder to directly print metal parts, also known as metal powder sintering (SLM).
Bismuth sulfide is a chemical substance with the molecular formula Bi2S3, insoluble in water, toxic, weakly radioactive, and harmless to the human body. For the preparation of bismuth compounds. Bismuth sulfide is an important semiconductor material.
A wave of layoffs that has swept the entire Internet industry has intensified. China's Internet industry has experienced several crises and major changes in the past development process. There is also a "brief history of layoffs by major Internet
This article will introduce the dispersion, lubrication and steric resistance of water reducer.