3results about How to "Improve doping effect" patented technology

The invention discloses a medical high-purity nano cerium oxide-based suspension as well as a preparation method and application thereof. The mass concentration of the cerium oxide-based particles in the suspension is 1-200mg / L, the chemical general formula of the cerium oxide-based particles is CexM1-xO alpha D delta, M is a cation doped element, D is an anion doped element or group, x is more than 0 and less than or equal to 1.0, alpha is more than 1.0 and less than or equal to 2.0, delta is more than or equal to 0 and less than or equal to 0.2, and the cerium oxide-based particles Ce < 3 + > in the suspension account for 25-55% of the total Ce in percentage by mass; the average primary particle size of the cerium oxide-based particles is 3-50 nm, and the dispersity of the cerium oxide-based particles in the suspension is less than 0.7. The suspension prepared by the method is high in trivalent cerium content, high in oxygen vacancy content and high in biological activity and safety, and the preparation method is low in cost, stable in technical route, free of biological harmful additives and easy for large-scale industrial production.

The application discloses a kind of frame reinforced wave-transparent heat-insulating aerogel materials and preparation method thereof, belong to composite material technical field.The application disperses aluminium oxide nano powder in water, adds adsorbent solution, wave-transparent-light-shielding dual-function auxiliary nano particles, obtains precursor mixed solution after being mixed uniformly;Put ceramic frame into reaction kettle, add precursor mixed solution, make precursor mixed solution fully soak ceramic frame, place reaction kettle in heating environment and carry out reaction to obtain wet gel;Wet gel is taken out, remove wet gel on the surface of ceramic frame, solvent replacement is carried out using organic solvent, and supercritical drying is carried out to obtain aerogel;The aerogel is heat treated to obtain frame reinforced wave-transparent heat-insulating aerogel material.The application introduces wave-transparent-light-shielding dual-function auxiliary and rigid frame structure, and obtains aerogel composite material with good overall formability, high temperature resistance, excellent dielectric properties and excellent mechanical strength.

The application provides a method for preparing lithium manganese iron phosphate from iron hydroxyphosphate, wherein ferrous sulfate is purified to form a ferrous sulfate solution, hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution, titanium sulfate and ammonia are sequentially added into the solution to form a mixed slurry after reaction, the mixed slurry is heated to a certain temperature and kept for a certain time, and then water washing and pressure filtration are performed to form iron hydroxyphosphate precursors with different iron-phosphorus ratios; the iron hydroxyphosphate precursors are subjected to flash drying and high-temperature sintering and crushing to obtain iron hydroxyphosphate precursors with different iron-phosphorus ratios and different specific surface areas; the iron hydroxyphosphate precursors are crushed and mixed to obtain iron hydroxyphosphate finished products; high-iron-phosphorus-ratio iron hydroxyphosphate and low-iron-phosphorus-ratio iron hydroxyphosphate are mixed according to a certain proportion, and lithium source, manganese source and phosphorus source are proportioned according to a certain proportion, and carbon source and additives are added to form a mixture; and after processes such as ball milling, sand milling, spray drying, sintering, crushing, screening, batching and packaging are performed on the mixture, lithium manganese iron phosphate finished products are obtained.