34results about How to "Uniform microscopic morphology" patented technology

The invention relates to a preparation method of a silica gel modified wood-base silicon carbide ceramic material and belongs to the field of preparation of wood-base silicon carbide ceramic materials. The preparation method comprises the steps of respectively weighing a certain mass of wood flour, silica powder and silica gel, calculating the total mass, weighing a certain mass of graphene oxide,uniformly mixing weighed graphene oxide and silica gel weighed in the step 1, adding wood flour and silicon powder, uniformly mixing, putting the mixture into a drying oven, drying so as to obtain afirst mixture, respectively pre-hot-pressing or drying, and carrying out sintering reaction on the obtained sample through program temperature control under the protection of nitrogen, so as to obtainthe silica gel modified wood-base silicon carbide ceramic material, wherein the mass of graphene oxide is 1-5% of the total mass of step 1. The preparation method is simple and convenient and is relatively low in quality change rate and relatively good in corrosion resistance; and by virtue of pre-pressure thermal treatment, the silica gel modified wood-base silicon carbide ceramic material has relatively good electric conductivity.

The invention discloses a rare-earth luminescent nano-material based on an aggregation induction effect as well as a preparation method and application thereof. The rare-earth luminescent nano-material based on the aggregation induction effect, disclosed by the invention, is a novel rare-earth luminescent and aggregation induction effect (AIE) luminescent coexisting material; the material has a uniform microstructure and the grain diameter of grains is about 32.16nm; the preparation method disclosed by the invention is simple, and an oleophylic rare-earth europium complex luminescent componentand a compound A are introduced and the rare-earth luminescent component is covered with by nanoparticles through a co-assembly method; an aldehyde group on the surface can react with amino with polyethylenimine so that the component can be modified onto the surfaces of the particles; the material has strong dispersity in water; the rare-earth luminescent nano-material based on the aggregation induction effect has a ratio fluorescence detection behavior on hydrogen ions. Furthermore, a detection process can be circularly repeatedly used for at least 10 times through simply regulating the pH (Potential of Hydrogen) value of the solution; the rare-earth luminescent nano-material can be potentially applied to the fields including environment acidity detection, cell acid-base imaging and thelike.

The invention discloses a method for using a solvent thermal method to assist in synthesizing multiphase titanate red long afterglow fluorescent powder. High-concentration Ca2+, Zn2+, Pr3+, Bi3+ and B3+ metal ion solutions are introduced into alcoholic solutions of ethyl alcohol, ethanediol, glycerol, isopropanol or normal butanol containing butyl titanate. The multiphase red long afterglow fluorescent powder is synthesized according to the stoichiometric ratio of [Ca0.8Zn0.2TiO3]: Pr, aBi3+, bB3+(0<=a<=0.01, 0<=b<=0.01) and [CaTiO3.mZn2TiO4]: Pr3+ (0(m(0.5)). A solvent thermal method is adopted for preparing a precursor, and the precursor is roasted in a high-temperature furnace at 900-1,150 DEG C for 3-5 h. The method is simple in process and small in pollution, and Bi3+, B3+ and other zwitter ions much influenced by pH can be effectively doped. The red long afterglow fluorescent powder which has the grain size at the micron order, uniform microstructures, broadband excitation at 300-400 nm and narrowband emission at 600-630 nm is obtained. The obtained powder does not need to be further ground and can be directly applied to white LEDs based on ultraviolet chips, farm-oriented facilities, solar cells and the like.