49results about How to "High near-infrared reflectivity" patented technology

The invention belongs to the technical field of functional ceramic pigments, in particular to a flower cluster LaFe x Eu 1‑x o 3 / TiO 2 The preparation method of composite superfine red ceramic pigment is specifically: 1) 2.0g of P 123 Add it into 1000ml, 1.6mol / L hydrochloric acid solution; 2) Stir it properly with a glass rod, and after it is completely compatible, add a certain amount of LaFe x Eu 1‑x o 3 Stir the powder and butyl titanate on a magnetic stirrer for a certain period of time to obtain a yellow transparent solution; 3) Cover the obtained solution with a plastic wrap and let it stand for 1-2 days, and use distilled water to centrifuge the powder precipitated in the beaker at 2400r 4 times per minute; 4) drying; 5) calcining the obtained powder under certain conditions to obtain a composite ultrafine red ceramic pigment. The composite ultrafine red ceramic pigment prepared by the method of the present invention has combined LaFe x Eu 1‑x o 3 and TiO 2 It has the advantages of high near-infrared reflectivity, high chemical stability, and bright color.

The invention discloses a nickel-doped barium polytitanate yellow solar heat reflection pigment, specifically relates to the field of new chemical materials, and the phase of the pigment is BaTi 5 o 11 、BaTi 4 o 9 or Ba 2 Ti 9 o 20 One or more blends in; the present invention also includes the method for preparing nickel-doped barium poly titanate yellow solar heat reflective pigment by solid phase method, and the liquid-solid phase combination method for preparing nickel-doped barium poly titanate Method of yellow solar heat reflective paint. The phase composition of the pigment of the present invention is BaTi 5 o 11 、BaTi 4 o 9 or Ba 2 Ti 9 o 20 One or more blends in the phase, the content of alkaline earth metal Ba in this phase is low, can greatly reduce the use of alkaline earth metal Ba, so can reduce the impact of the use of barium source in the preparation process on the environment, and Doping a small amount of Ni in the pigment phase can reduce the absorption of Ni element in the near-infrared region, so that the prepared pigment has high near-infrared reflectivity and can be applied to the preparation of solar heat reflective coatings.

The invention provides reflecting waterborne heat-insulating coating and a preparation method thereof. The reflecting waterborne heat-insulating coating comprises an emulsion, a functional filler, a dispersant, a defoaming agent, a thickener, a film-forming aid, an anti-freezing agent, a pH regulator, a preservative and the balance of water. The functional filler is hollow glass microsphere / titanium dioxide film composite, having core-shell structure; titanium dioxide film is 0.3-0.7 mu m in thickness; titanium dioxide exists in anatase form, and has a coating quantity by weight of 5-25%. Thereflecting waterborne heat-insulating coating prepared herein has good uniformity, has high sunlight reflecting rate, and has small heat conductivity coefficient, good performance stability and excellent heat insulation.

The invention discloses functional ceramic pigment with high near-infrared reflectivity and a preparation method thereof. The functional ceramic pigment is prepared from the following raw materials: soluble neodymium salt, a soluble titanium source and a soluble silicon source, and the chemical composition of the near-infrared high-reflectivity functional ceramic pigment is Nd2TixSi2-xO7, whereinx is greater than or equal to 0.05 and is smaller than 0.8. The preparation method of the functional ceramic pigment is characterized by taking citric acid as a chelating agent, and adopting a sol-gelbinding combustion method, thus obtaining the functional ceramic pigment with the high near-infrared reflectivity. The functional ceramic pigment disclosed by the invention has the high near-infraredreflectivity and has a color-changing decoration effect, and the composition contains no toxic elements; the preparation method is simple in technology, complicated equipment is not required, and industrial application is facilitated.

The invention provides a double-doped CaAl2O4 type near-infrared reflective pigment and relates to the technical field of inorganic oxide pigments. The provided pigment is a composite metal oxide, metal elements in the composite metal oxide include Ca, Al, Ce and Fe, and Ca, Ce, Al and Fe account for 28.3%, 5.0%, 55.0-61.7% and 5.0-11.7% of the total mole number of the metal elements respectively.The provided pigment is environmentally friendly and free of toxic substances, has the characteristic of color diversity and can be displayed in the color between yellow and brown in a visible lightband along with the change of the doping number of the metal elements, and the near-infrared reflectivity is high at the same time. The invention also provides a preparation method of the pigment. Thesol-gel preparation method is adopted, the process is simple, the pigment with high purity can be prepared at the relatively low temperature, and the method has the advantages that the reaction period is short and the reaction process is easy to control.