41 results about "Portlandite" patented technology

The invention belongs to a resin type silicate wood modifier and a preparation method of a modified material of the modifier. According to the preparation method, the resin type silicate wood modifier is prepared by taking melamine, formaldehyde, urea and soluble sodium silicate as main raw materials as well as respectively taking polyvinyl alcohol and diethylene glycol as a toughening agent and a stabilizer; the resin type silicate wood modifier can be stably stored for a long time and can be repeatedly recycled. The modifier has the advantages that the dimensional stability, the density, the surface hardness, the anti-bending strength, the anti-bending elastic modulus, the impact toughness and the wear resistance of artificial forest wood processed by virtue of the modifier are substantially improved, the modifier has the advantages that the flame retardance and environment-friendly effect are achieved, no pollution is caused to a human body and the environment, the leachability resistance of the modifier in the processed wood is improved, and the application value of the artificial forest wood is improved.

The invention provides a carbon fiber felt reinforcement inorganic polymer matrix composite and a preparation method of the carbon fiber felt reinforcement inorganic polymer matrix composite, and relates to an inorganic polymer matrix composite and a preparation method of the inorganic polymer matrix composite, in particular to the carbon fiber felt reinforcement inorganic polymer matrix composite and a preparation method of the carbon fiber felt reinforcement inorganic polymer matrix composite. The problems that an existing inorganic polymer material is poor in mechanical performance and low in toughness and the operation for adding short carbon fiber is complex are solved. The product is prepared through inorganic polymer material pulp and carbon fiber felt. The inorganic polymer material pulp is prepared through potassium hydroxide, silica sol and aluminosilicate powder. The method includes the steps of firstly, preparing the inorganic polymer material pulp; secondly, washing the carbon fiber felt; thirdly, preparing a prefabricated material blank; fourthly, preparing the carbon fiber felt reinforcement inorganic polymer matrix composite. The method is simple in process, low in cost, environmentally friendly and capable of being use for large-area preparation, and the prepared composite is good in mechanical property and wider in application range.

The invention discloses a carbon-based wave absorbing material prepared from aluminosilicate polymer and a preparation method of the carbon-based wave absorbing material. The carbon-based wave absorbing material is formed by using metakaolin, a carbon material and an alkali activating solution to synthesize the aluminosilicate polymer and curing, wherein a mole ratio of metakaolin and the carbon material is 1:(3-24), and a mole ratio of silicon and aluminum in the aluminosilicate polymer is (1-2):1. The preparation method includes: activating kaolin; preparing mixed powder; preparing the alkali activating solution; preparing the aluminosilicate polymer; curing for forming. The preparation method is simple in process, capable of realizing direct forming of complex or large parts at low temperature and wide in application range. The carbon-based wave absorbing material is low in cost and high in unit thickness absorptivity and meets requirements on thinness, lightness, width and strength.

The invention discloses a boride modified glass ceramic based composite high-temperature oxidation resisting coating. The composite high-temperature oxidation resisting coating fired on the surface of a refractory metal matrix is prepared from boride and silicate glass, wherein the boride is at least one or two of HfB2, ZrB2 and TiB2; besides, the invention further discloses a preparation method of the coating. The method comprises steps as follows: 1, the surface of the refractory metal matrix is treated; 2, boride particle modified glass ceramic composite slurry is prepared; 3, a preset layer is obtained by presetting the slurry on the surface of the refractory metal matrix, and the boride modified glass ceramic based composite high-temperature oxidation resisting coating is obtained vacuum high-temperature firing. The composite high-temperature oxidation resisting coating is used for high-temperature protection of the refractory metal matrix and can continuously protect the refractory metal matrix at the protection temperature of 400-1,600 DEG C for 5 h or longer.

The invention relates to a method for preparing continuous SiO2 / nanocrystalline metal aerogel fiber with catalytic performance by adding nanocrystalline metal in situ. The method comprises the steps that salicate is prepared into a spinning solution, then, a nanocrystalline metal catalyst is added into the spinning solution, the spinning solution is added into coagulating bath, reaction wet spinning is conducted, orthosilicic acid / silicate fiber containing the nanocrystalline metal catalyst is obtained, winding and room temperature ageing are conducted, the orthosilicic acid / silicate fiber is washed to be neutral through deionized water, solvent replacement is conducted through deionized water or ethyl alcohol, drying is conducted, and the continuous SiO2 / nanocrystalline metal aerogel fiber is obtained. The method has the advantages that raw materials are low in price and easy to obtain, the reaction process is simple, and spinnability is good. The continuous SiO2 / nanocrystalline metal aerogel fiber with catalytic performance prepared through the method has abundant holes, and is high in specific surface area, and resistant to high temperature and chemical corrosion; the specific surface area of the fiber and the content of nanocrystalline metal in the fiber are adjustable, and the method has application prospects in catalysis and other fields.

The invention relates to a diatomite / ground limestone composite humidity controlling material and a preparation method thereof. The preparation method comprises the following steps: by taking diatomite and ground limestone as raw materials, adopting a uniform mixing-roasting method, batching and uniformly mixing the diatomite and ground limestone according to a mass ratio of 1:(0.5-1.5), feeding the mixture into a rotary furnace, roasting at 600-850 DEG C for 1.0-3.0 hours, thereby obtaining the product. According to the composite humidity controlling material, main mineral components of the composite humidity controlling material are calcium silicate, portlandite, calcite and dehydrated diatomite, the nitrogen adsorption specific surface area is more than or equal to 8m<2> / g, the pore volume is more than or equal to 0.02cm<3> / g, and the mean pore size is 8-15nm. According to the composite humidity controlling material prepared by the method disclosed by the invention, the moisture absorption performance is obviously improved compared with the moisture absorption performance of a pure diatomite humidity controlling material, the ambient temperature is 30 DEG C, and the maximum moisture absorption content reaches 13 percent and 10 percent or more under the relative humidity of 90 percent and 80 percent; and moreover, the balanced moisture content reaches 13 percent and 9 percent or more and is improved by more than two times compared with that of pure diatomite, and the composite humidity controlling material adopts a simple preparation process, is low in production cost and has good application prospects.