50results about How to "Improve skeleton strength" patented technology

The invention relates to a mechanical-enhanced SiO2 aerogel material and a preparation method thereof. According to the method, the mixed SiO2 aerogel with a changed microstructure is successfully prepared by mixing two different concentrations of SiO2 sols via a process (sol coagulation method) capable of performing gelling on the SiO2 sols simultaneously, wherein the elasticity modulus of the mixed SiO2 aerogel is 5.53MPa. Thus, compared with the traditional aerogel, the mechanical property of the mixed SiO2 aerogel provided by the invention is nearly doubled, namely, the mixed SiO2 aerogel has the excellent mechanical property. The specific surface area of the SiO2 aerogel is 882g / cm<3> and the average pore size of the SiO2 aerogel is 28nm due to that the skeleton strength in the network structure of the SiO2 aerogel is further enhanced at the same time when the gel pore structure distribution of the SiO2 aerogel is changed by the sol coagulation method. Thus, the SiO2 aerogel prepared by using the synthesis method has the special porous nanostructure and the excellent mechanical property. As a result, the application value and the application potential of the SiO2 aerogel in the fields of photoelectric devices, gas sensitive sensors, heat insulation and the like are greatly improved.

The invention belongs to the technical field of heat insulation materials, and discloses a preparation method of an alumina-silica airgel heat insulation composite material. The preparation method of the invention adopts alumina and silica sol with water as a solvent, and inorganic ceramic fibers as Reinforcement phase, through six simple process steps of preparing fiber prefabricated parts, preparing alumina-silica sol, vacuum impregnation, gel aging, hydrothermal assisted drying, and drying, a high-temperature resistant, low thermal conductivity, high-strength oxidation Aluminum-silica airgel thermal insulation composites. The preparation method of the material adopts raw materials without organic aluminum / inorganic aluminum / organosilicon compounds. During the preparation process, there is no organic solvent replacement and no flammable and explosive ethanol solvent is used as a drying medium. The raw materials and preparation process are green, environmentally friendly and safe. The manufacturing cost is low, and it is easy for mass production and large-scale application.

The invention discloses ceramsites prepared from coal gangue and coal slime and a preparation method for the ceramsites, and belongs to the technical field of artificial light aggregates. The ceramsites are obtained by roasting a mixture comprising the coal gangue, the coal slime, quartz sands and feldspar. The preparation method for the ceramsites comprising steps of porphyrizing and sieving three raw materials to obtain raw materials whose particle sizes are less than 200 meshes, wherein the three raw materials comprise, by weight, 60% to 80% of the coal gangue, 5% to 10% of the quartz sands and 10% to 20% of the feldspar; mixing the raw materials with the coal slime to obtain the mixture, wherein the weight percentage content of the coal slime is 10% to 30%; balling the mixture; carrying out high temperature roasting to spheres in a muffle furnace after the spheres being dried; and carrying out a cooling treatment to obtain products. The ceramsites are characterized by no aperture on the surface, high strength and uniform size, and can widely used in the field of engineering construction, chemical engineering, etc.

The invention belongs to the technical field of artificial lightweight aggregates and discloses a high-strength ceramsite and a preparation method thereof. The high-strength ceramsite comprises the raw materials: decarbonized coal slime, project spoil and iron raw materials; the method comprises the following steps: S1, mixing the decarbonized coal slime, the project spoil and a small deal of ironraw materials according to the mass percentage, and then, grinding the mixture by using a ball mill to obtain 15%-30% of 80-m um sieving residues; and S2, preparing a raw sphere by using a disc pelletizer; raising the temperature from the room temperature to 200 DEG C in a muffle furnace, and keeping the temperature; then, raising the temperature to 600 DEG C, and keeping the temperature; and finally, raising the temperature to 1180-1195 DEG C, keeping the temperature, and carrying out natural cooling to the normal temperature to obtain a finished product of the high-strength ceramsite. The high-strength ceramsite is prepared without adding other additives such as 15-30% of quartz sand and feldspar, and the prepared ceramsite has the advantages such as hard surface texture, relatively light volume weight, high cylinder compressive strength and low water absorption rate.