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…
Nano Silicon Dioxide Powder SiO2 Nanoparticles is white powder with excellent chemical stability. It has the qualities of tiny bit dimension, several micropores, large particular surface area, high hydroxyl material externally.About Nano Silicon Diox…
Excess lead iodide (PbI2) in can reduce the halide vacancies improve the carrier lifetime of perovskite films. Therefore perovskite solar cells (PSC) usually use excessive PbI2 as a defect passivation material to improve device efficiency. H…
Concrete superplasticizer is high efficienct water reducing agent. Its difference from ordinary water reducing agent lies in the high-water reduction rate. The water reduction rate of ordinary water reducing agent is generally 5%-10%, and the water r…