3results about How to "Low hydroxyl content" patented technology

The utility model belongs to the technical field of quartz sand preparation, and particularly relates to a vacuum sintering device. The vacuum sintering device provided by the utility model can provide a vacuum environment for quartz sand preparation, impurities in gas-liquid inclusion can be more effectively removed in a high-temperature vacuum state, the purity of the quartz sand is improved, the vacuum environment has no pollution source, and the quality of the quartz sand can be effectively controlled. Meanwhile, the vacuum environment is beneficial to inhibiting volatilization and diffusion of some impurities and preventing the impurities from entering the quartz sand again; the high-temperature vacuum state is beneficial to removal of hydroxyl in the quartz sand. According to the vacuum sintering device provided by the utility model, quartz sand can be prepared by adopting single equipment, the prepared quartz sand is high in purity which is more than 99.998%, the hydroxyl content is low, the hydroxyl content is less than 1ppm, the granularity is 0.1-0.3 mm, the quartz sand can be used as a raw material of inner-layer sand of a photovoltaic or semiconductor quartz crucible, meanwhile, the production efficiency is improved, and the vacuum sintering device is green and environment-friendly.

This invention provides a coloring photosensitive resin composition and its application. The coloring photosensitive resin composition comprises an alkali-soluble resin, a photosensitive compound, a colorant, a first crosslinking agent, and a second crosslinking agent. The first crosslinking agent has a structure as shown in Formula I, and the second crosslinking agent has a structure as shown in Formula II. Through the design of the first and second crosslinking agents and their mutual compounding with other components, this invention enables the formation of a rich crosslinked network structure after high-temperature curing, reducing the hydroxyl content and significantly lowering the moisture absorption rate of the resulting coloring-cured film. Furthermore, the coloring-cured film exhibits significantly improved heat resistance, chemical corrosion resistance, water vapor corrosion resistance, mechanical strength, and barrier properties, thereby increasing the yield of display devices containing it and providing advantages such as good heat resistance, high reliability, and high pixel stability.

The invention belongs to the technical field of catalysts, and discloses an iron-based catalyst and a preparation method and application thereof. The preparation method of the iron-based catalyst comprises the following steps: mixing an iron salt, an organic acid salt and an organic solvent, crystallizing to obtain a solid, impregnating the solid with a modified solution, drying, and roasting in a reducing atmosphere to obtain the iron-based catalyst, the modified solution comprises an alkyl trimethyl ammonium bromide solution. The iron-based catalyst prepared by the preparation method can realize high CO2 conversion rate, high olefin selectivity and excellent water oxidation resistance stability.