Monthly Archives - April 2023

A spongy porous Fe-doped modified potassium vanadium phosphate

As the society attaches great importance to green and environmental protection, new electrochemical energy storage technologies are constantly updated. Lithium-ion batteries, due to their high energy density, high safety, light weight and long life, occupy a large market share in electrochemical energy storage technologies, such as new energy vehicles, mobile phones and power tools. However, with the widespread use of lithium-ion batteries, its disadvantages are becoming more and more apparent Due to the scarcity of lithium resources, high price and low [...]

Lithium aluminum hydride reduction cyanide why accident

Two 1mol reduction reactions of the following compound 10 were carried out. The reaction operation was very standard, which was called argon flow. The whole reaction process was maintained at about 5 degrees Celsius, and the reaction was monitored after several hours of stirring. One of the 8L reactors was quenched with ice methanol. As soon as the first drop of methanol was added, an orange flame immediately appeared in the reactor and exploded. The reactor was destroyed, the [...]

Molybdenum disulfide nanoflower-MoS2 nanosheet

The layered MoS2 nanoflower samples with the size of 1-2 microns were successfully prepared by hydrothermal synthesis. Each MoS2 nanoflower was formed by a large number of intersecting MoS2 nanoflakes in a regular center polymerization. In addition, we also used a simple two-step hydrothermal method to prepare high purity heterogeneous nanoflowers,MoS2 nanoflowers uniformly covered with Sn02 nanoparticles -MoS2@SnO2 heterogeneous nanoflowers, which enriched the heterogeneous structure system based on MoS2. The lattices and morphologies of MoS2 nanoflowers and MoS2@SnO2 heterogeneous nanoflowers [...]

Gadolinium zirconate material for thermal barrier coatings

Advanced aero-engine technology is one of the important symbols of a country’s scientific and technological level, industrial base and comprehensive national strength. In order to improve the performance of aeroengine, higher requirements should be put forward for turbine inlet gas temperature. Generally speaking, the temperature at the front inlet of a first-stage turbine with a thrust-to-weight ratio of 10 is about 1,950 K, and the temperature at the front inlet of a first-stage turbine with a thrust-to-weight ratio of [...]

Ytterbium disilicate coating can extend the life of jet engines

Aircraft manufacturers and their government and industrial customers have designed new aircraft engines that can operate at extremely high temperatures, meaning the engines can generate more energy while burning less fuel. Haydn Wadley, Edgar Starke Professor of Materials science and engineering at the University of Virginia’s School of Engineering and Applied Science, and Jeroen Deijkers, a postdoctoral research associate in Wadley’s group, have found a way to greatly extend the useful life of these engine materials. A jet engine draws in [...]

Preparation method of nanometer molybdenum trioxide

1. Hydrothermal synthesis method in the closed reactor, the 4∶1(molar ratio) molybdic acid and laurel gum reaction to molybdic acid molecules on the technology of amine, reaction temperature is 150℃, time is 1 day, at this time the light yellow molybdic amine compound turned white, cold to room temperature, aging 48h after the release of products, and then with 33% nitric acid aqueous solution, at room temperature 48h, remove the amine combination The pure nanometer molybdenum trioxide fiber was [...]