5results about How to "Excellent thermoelectric conversion performance" patented technology

The invention relates to the technical field of nano materials, and provides a preparation method and application of a NaxCoO2 nano thermoelectric material synthesized by combining a self-propagating method and a cold pressing method. The invention aims to solve the problems of low production yield, complex process, low orientation degree, poor crystallinity and high cost of the conventional NaxCoO2 preparation method and improve the application of the NaxCoO2 in heat energy collection in a high-temperature area. According to the main scheme, the preparation method comprises the following steps: dissolving sodium nitrate and cobalt nitrate hexahydrate in a citric acid solution in proportion, heating to self-propagating combustion to obtain precursor powder, calcining, tabletting to obtain a NaxCoO2 polycrystalline block, and annealing to improve the compactness; the preparation method is used in the fields of thermoelectric power generation in a high-temperature area, refrigeration, medical treatment, sensing and the like, has the advantages of simple process, high preparation speed, high yield, low cost, good crystallinity and high thermoelectric performance, realizes quick preparation of the high-temperature thermoelectric material with high thermoelectric performance and high crystallinity, and has relatively high commercial and practical values.

The invention relates to a strontium titanate / boron nitride nanotube composite ceramic core block and a preparation method and application thereof, the composite ceramic core block is prepared from strontium titanate and boron nitride nanotubes, and the mass percent of the boron nitride nanotubes in the strontium titanate / boron nitride nanotube composite ceramic core block is 0.1-3%. The preparation method comprises the following steps: slowly adding obtained surface modified boron nitride nanotube slurry into strontium titanate slurry to obtain strontium titanate / boron nitride nanotube slurry; heating and stirring the strontium titanate / boron nitride nanotube slurry to obtain strontium titanate / boron nitride nanotube composite powder; the strontium titanate / boron nitride nanotube composite powder is subjected to pellet blank compression molding and sintering, and the strontium titanate / boron nitride nanotube composite ceramic pellet is obtained. Compared with the prior art, the heat conduction and mechanical properties of the 90SrTiO3 ceramic core block can be effectively improved.

The application relates to a heat dissipation device with a heat recovery function and an electronic device, wherein the heat dissipation device with the heat recovery function comprises a heat conduction box body with a first heat conduction box wall and a second heat conduction box wall; a thermoelectric conversion structure comprises a first thermoelectric conversion assembly arranged in the heat conduction box body, the first thermoelectric conversion assembly comprises at least one first thermoelectric conversion sheet, each first thermoelectric conversion sheet has a first cold surface and a first hot surface arranged oppositely, the first hot surface is attached to the inner surface of the first heat conduction box wall, and the first cold surface is adapted to indirectly contact the inner surface of the second heat conduction box wall; a heat dissipation assembly comprises a first heat dissipation fin, a substrate and a first heat conduction pipe group, the substrate is arranged between a heat source of the electronic device and the first heat conduction box wall, and two oppositely arranged surfaces are directly in contact with the heat source and the first heat conduction box wall respectively; the heat conduction box body is arranged between the first heat dissipation fin and the substrate, and the substrate is connected with the first heat dissipation fin through the first heat conduction pipe group; and the thermoelectric conversion effect and the heat dissipation efficiency are both high.

This invention belongs to the field of thermoelectric materials technology, specifically disclosing an ion thermoelectric gel device, its preparation method, and its application. The ion thermoelectric gel device includes at least one device; the device includes a first electrode, an ion thermoelectric gel unit, and a second electrode arranged in series; the first electrode and / or the second electrode includes a substrate layer and a conductive layer stacked together; the substrate layer is made of an elastic polymer material; the conductive layer is made of conductive particles and conductive nanowires; the conductive particles coat the surface of the conductive nanowires, and the materials of the conductive particles and the conductive nanowires are each independently selected from at least one of gold, silver, platinum, and copper. This device exhibits excellent ion thermoelectric potential and high normalized power density, effectively solving the long-standing core bottleneck of insufficient output power in this field.

This invention relates to a strontium titanate / boron nitride nanotube composite ceramic core, its preparation method, and its application. The composite ceramic core is prepared using strontium titanate and boron nitride nanotubes, with the boron nitride nanotubes comprising 0.1-3% by mass. The preparation method is as follows: a surface-modified boron nitride nanotube slurry is slowly added to a strontium titanate slurry to obtain a strontium titanate / boron nitride nanotube slurry; the strontium titanate / boron nitride nanotube slurry is heated and stirred to obtain a strontium titanate / boron nitride nanotube composite powder; the strontium titanate / boron nitride nanotube composite powder is pressed into a core blank and sintered to obtain the strontium titanate / boron nitride nanotube composite ceramic core. Compared with the prior art, this invention can effectively improve… 90 Thermal conductivity and mechanical properties of SrTiO3 ceramic core.