65results about How to "Preparation conditions are not harsh" patented technology

The invention discloses a preparation method for Er<3+>-Yb<3+>-co-doped NaYF4 fluorescent powder of which the crystalline phase can be controllably synthesized. The method comprises the following steps that yttrium acetate, ytterbium acetate, erbium acetate and sodium hydroxide are batched and mixed, isopropanol, ethyl alcohol and water serve as solvent, trifluoroacetic acid is added, and transparent sol A is obtained after the mixture is stirred evenly; heat treatment is performed on colloidal matter obtained by drying the transparent sol A, the temperature is increased to 300-800 DEG C from the room temperature, heat preservation is performed for a certain time, and the colloidal matter is cooled to the room temperature along with a furnace and then ground to obtain the Er<3+>-Yb<3+>-co-doped up-conversion fluorescent powder with different crystalline phase compositions and multiple light emitting colors. The preparation method is simple in synthesis technology, short in production cycle and capable of easily achieving scale production; the synthesized Er<3+>-Yb<3+>-co-doped up-conversion fluorescent powder is controllable in crystalline phase, diverse in light emitting colors and wide in application.

The invention aims to solve the technical problems of overcoming the defects of high resistivity, low ductility and poor adhesion between a conductive layer and a basal body of the transparent conductive film in the prior art and provide a novel transparent conductive film and a preparation method thereof. The novel transparent conductive film comprises the following components in percentage by mass: 25-35 percent of hydrogenated bisphenol A epoxy resin, 22-25 percent of epoxy resin active diluting agent, 0.5-1.5 percent of anti-ultraviolet (UV) additive, 20-30 percent of hydrogenated alicyclic amine, 2.5-4 percent of modified amine type curing promoter and 12-27 percent of conductive filler. The transparent conductive film is low in both surface resistivity and size resistivity, can be made into thin films of different thickness, and has the advantages of high transparency, high conductivity, high adhesion strength and the like; and the preparation method has the advantages of simple preparation method, readily available raw materials and non-severe preparation conditions.

The invention discloses abnormal distribution aluminum hydroxide powder. The abnormal distribution aluminum hydroxide powder is made by mixing of aluminum hydroxide powder in particle size of 2micronand aluminum hydroxide powder in particle size of 18micron, and a mixing mass ratio of the aluminum hydroxide powder in particle size of 2micron and the aluminum hydroxide powder in particle size of 18micron is 11:8-11:4, preferably 11:7-11:5 and most preferably 2:1. Application of the abnormal distribution aluminum hydroxide powder refers to adding of the abnormal distribution aluminum hydroxidepowder serving as filler in preparation of a component A of two-component epoxy resin electronic pouring sealant. The abnormal distribution aluminum hydroxide powder has advantages that problems of anti-settling mutual exclusion and low viscosity in an epoxy resin system can be effectively improved, and the fusion performance of the abnormal distribution aluminum hydroxide powder is effectively improved; by application of the abnormal distribution aluminum hydroxide powder serving as filler to the epoxy resin electronic pouring sealant, low-viscosity non-settling products can be obtained, service time and fluidity of the products can be improved remarkably, and high practicality is realized.

The invention discloses a method for preparing a supported catalyst for preparing cyclopentanone with furfural through hydrogenation. An activated carbon nano tube is adopted as a carrier, and loading metal comprises Ni, Cu, Co and Mg. The method for preparing the catalyst adopts a double dropwise adding and coprecipitation method, thus preparing the catalyst with high capacity and improving the catalytic effect of the catalyst; the preparation condition for the catalyst is easy to realize; and the range of raw materials for preparation is wide, precursors of all components are general and the raw materials for preparation can be selected flexibly according to market price. The catalyst prepared by the method has higher catalytic activity, the furfural conversion efficiency is above 96.6%, and the cyclopentanone selectivity is above 95.4%, so that the catalyst can be used for preparing the cyclpentanone with the furfural as a raw material, the problem that cyclopentanone self polymerization is easy to occur so as to generate a material with high boiling point in the process of generation of cyclopentanone by taking adipic acid as a raw material is solved, and the product yield is improved.