32results about How to "Promote in situ growth" patented technology

The invention discloses a whisker-reinforced zirconia planting integrated crown, which comprises a whisker-reinforced zirconia matrix, the center of the whisker-reinforced zirconia matrix is ​​provided with a longitudinally through screw hole, and the whisker-reinforced zirconia The zirconium matrix is ​​composed of the upper crown of the implant, the transgingival part and the connecting part for connecting the implant from top to bottom; the material of the whisker-reinforced zirconia matrix is ​​whisker-reinforced zirconia, and the whisker-reinforced zirconia The raw materials of strong zirconia include main materials and additives, the main materials are composed of 80-99% zirconia and whiskers 1-20% by mass percentage, and the additives include: superfine Nano-alumina powder 0.1-1%, ultra-fine nano-silica powder 0-0.1%. The invention can not only meet the requirements of aesthetic performance, but also meet the requirements of mechanical strength similar to the one-piece crown made of titanium metal, meanwhile, the surface roughness can be controlled, and it has good biological activity and biocompatibility.

A method for preparing ultra-large sheet RGO loaded ultrafine β-FeOOH nanoparticles lithium-ion battery negative electrode material, dispersing graphene oxide in deionized water to obtain suspension A; adding a certain amount of soluble salt, sodium chloride and urea Add absolute ethanol and deionized water, and then mix with suspension A to obtain suspension B; pour suspension B into a homogeneous hydrothermal reaction kettle, then seal the reaction kettle, and put it into a homogeneous hydrothermal reaction kettle. After the hydrothermal reaction in the reactor, naturally cool to room temperature to obtain product C; wash product C with water and alcohol respectively, and disperse the washed product in water to obtain product D; freeze-dry product D to obtain RGO large sheet-loaded ultrafine β ‑FeOOH nanoparticle lithium-ion battery negative electrode material, the present invention uses composite graphene, particle size reduction method to improve the performance of β‑FeOOH, can provide more electrochemical active sites and ion transport channels, thereby improving the reversible capacity of the battery . 5000mA g ‑1 The lower reversible capacity exceeds 1000mAh g ‑1 , is a very potential lithium battery negative electrode material.

The invention discloses an aramid composite diaphragm based on in-situ modification and a preparation method thereof, comprising a diaphragm base film and an aramid composite coating coated on one side or both sides of the base film, the base film is a poly Olefin porous membrane, the aramid composite coating is coated with aramid nanofibers modified in situ with functional nanoparticles, and the functional nanoparticles are iron oxide, tungsten oxide, molybdenum disulfide or ZIF‑67 kind of. The aramid composite separator has good thermal stability and mechanical stability, and is applied in lithium-sulfur batteries, which can accelerate redox reaction and lithium ion transmission rate, and at the same time, it can well adsorb polysulfides and inhibit the shuttle of polysulfides , improve the cycle performance and rate performance of the battery, and enhance the thermal stability and safety performance of the battery.

The invention relates to a method for in-situ growth of silicon carbide nanowires by impregnating and cracking method of non-catalyzed precursors, in which PCS and xylene mixed solution is impregnated into SiC W In the preform, cure at 200°C for 1 hour, and crack porous SiC at 900-1100°C for 2 hours W / SiC; 3. Porous SiC W / SiC heat treatment: the porous SiC W / SiC is heat treated at 1300-1500°C for 2 hours, and the "two-step method" refers to immersion, curing, cracking and heat treatment. The present invention uses solidification and cracking to first remove the unnecessary gas phase for growing SiCNWs, and then uses heat treatment to release the necessary gas phase for growing SiCNWs, and at the same time utilizes SiC W The two-stage pore structure of the preform greatly increases the supersaturation of the necessary gas phase, thereby realizing the PIP non-catalytic in situ growth of SiCNWs.

The invention relates to the field of semiconductor materials and aims to provide a preparation method for a TiO2 / InVO4 composite porous micro-sphere. The method comprises the following steps: adding an NH4VO3 water solution into an InCl3 water solution; adjusting the pH value to 4 and agitating to obtain precipitate; adding the precipitate into a CTAB (Cetyltrimethyl Ammonium Bromide) water solution and carrying out a hydrothermal reaction; filtering, washing and drying the obtained precipitate and carrying out heat treatment to obtain an InVO4 porous micro-sphere; dispersing the InVO4 porous micro-sphere into absolute ethyl alcohol to obtain a dispersion system; gradually dripping polymer type TiO2 sol; filtering and drying the precipitate to finish a dip-coating procedure to obtain a TiO2 gel coated InVO4 porous micro-sphere; adding the TiO2 gel coated InVO4 porous micro-sphere into the water, agitating in a water bath, and filtering, washing and drying the precipitate to obtain a product. According to the preparation method for the TiO2 / InVO4 composite porous micro-sphere, the nucleation and growth problems of a TiO2 nano crystal are solved so as to accelerate the TiO2 nano crystal to grow in the InVO4 composite porous micro-sphere in an in-situ manner and prevent homogeneous separation of the nano crystal in the solution in a traditional method; the problem that the high specific surface area and the recycling of catalytic materials cannot be considered at the same time is solved and the large specific surface area and apparent size can be obtained simultaneously.

The invention discloses a preparation method of a nitrogen-doped porous carbon / carbon nanotube compound with an interpenetrating network structure. The asphalt and additives are mixed, then a solvent is added, stirred and mixed evenly, and then the solvent is distilled off, followed by drying, carbonization and other processes to prepare fluffy graphitized porous carbon. The graphitized porous carbon is added into an ethanol aqueous solution and ultrasonicated for 20 minutes, then a nitrogen source and a transition metal catalyst are added, stirred in a water bath, dried, carbonized, and finally pickled, washed with water, washed with alcohol, and dried. In the present invention, carbon nanotubes can be obtained by in-situ growth on the inner and outer surfaces of the fluffy graphitized porous carbon prepared by asphalt, the process is simplified and controllable, the production efficiency is high, the utilization rate of energy is greatly improved, and it is beneficial to reduce carbon The entanglement of the nanotubes is easy to disperse, and the preparation process is simple, the cost is low, and the industrial production is easy.