2results about How to "Uniform grain distribution" patented technology

The invention belongs to the technical field of fluorescent ceramic preparation, and relates to an enhanced near-infrared luminescence MgAl2O4: Cr < 3 + > fluorescent ceramic and a preparation method thereof, and the preparation method comprises the following steps: dissolving Mg (NO3) 2.6 H2O, Al (NO3) 3.9 H2O and Cr (NO3) 3.9 H2O in deionized water, then adding urea, stirring and dissolving; transferring the mixed solution into a reaction kettle for hydrothermal reaction to obtain MgAl2O4: Cr < 3 + > powder; adding a sintering aid CaF2 into the MgAl2O4: Cr < 3 + > powder, and carrying out ball milling and mixing; the ball-milled powder is poured into a mold to be compacted and then put into an SPS sintering furnace to be sintered; the sintered ceramic is subjected to annealing treatment; the surface of the annealed ceramic is sequentially subjected to coarse grinding and polishing operation, and the MgAl2O4: Cr < 3 + > fluorescent ceramic is obtained. According to the method, the luminescent property of Cr < 3 + > is remarkably promoted, and meanwhile, the high density and excellent mechanical property of the ceramic are guaranteed.

A wind turbine reducer, relating to the field of wind power equipment technology, is used to solve the technical problems of high processing cost, difficult operation, and low precision in existing technologies. In the wind turbine reducer, the upper body, the first steel tube internal gear ring, and the support base are connected by the first bolt; the support base, the second steel tube internal gear ring, and the lower body are connected by the second bolt. Because the production process of the steel tube internal gear ring is relatively simple and is usually mass-produced, material procurement is relatively stable, and its price is lower than that of forging materials, thus effectively reducing material costs. At the same time, compared to forging materials, it saves the cost of mold making, and the internal microstructure of the steel tube internal gear ring has a uniform grain distribution, resulting in stable mechanical properties and effectively simplifying the processing flow. Furthermore, the design of the steel tube internal gear ring can be applied to wind turbine reducers of different specifications and types, thus having wide applicability and being suitable for various specifications.