A kind of preparation method of nanoscale granular sodium cobaltate thermoelectric material

A thermoelectric material, a technology of sodium cobalt-like, applied in the directions of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of many process links and high production costs, and achieve reduced process links, low production costs, and good dispersion. Effect

Active Publication Date: 2015-09-09
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects and problems of many process links and high production cost in the prior art, and provide a nano-scale granular sodium cobaltate thermoelectric material with few process links and low production cost. method

Method used

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  • A kind of preparation method of nanoscale granular sodium cobaltate thermoelectric material
  • A kind of preparation method of nanoscale granular sodium cobaltate thermoelectric material
  • A kind of preparation method of nanoscale granular sodium cobaltate thermoelectric material

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Embodiment 1

[0046] see image 3 , a method for manufacturing a nanoscale granular sodium cobaltate thermoelectric material, the method includes the following processes in sequence;

[0047] Preparation of the mixed solution: first analyze the pure NaNO 3 , Co(NO 3 ) 2 ·6H 2 O, urea is mixed uniformly, then dissolves in deionized water together, and stirs to prepare mixed solution; The NaNO 3 , Co(NO 3 ) 2 ·6H 2 The molar ratio of O, urea, and deionized water is 0.5–0.55:1:6–7:60–65, and NaNO 3 , Co(NO 3 ) 2 ·6H 2 The mass percent concentrations of O and urea are all greater than or equal to 99.9%;

[0048] Obtaining the precursor: First, continue heating and stirring the above mixed solution. When the mixed solution boils and produces purple precipitates, the self-propagating reaction begins. At this time, stop stirring and continue heating to keep the mixed solution in a boiling state. When the crystalline black precursor is used, the self-propagating combustion reaction ends...

Embodiment 2

[0051] The basic content is the same as that of Example 1, except that in the preparation of the thermoelectric material: the heating temperature is 620° C., and the heating time is 100 min.

Embodiment 3

[0053] The basic content is the same as that of Example 1, except that in the preparation of the thermoelectric material: the heating temperature is 700° C., and the heating time is 80 minutes.

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Abstract

A manufacturing method of a nanometer granular sodium cobaltate thermoelectric material orderly comprises three processes of mixed solution preparation, precursor acquisition, and thermoelectric material preparation, wherein the mixed solution preparation is to uniformly dissolve NaNO3, Co(NO3)2.6H2O, and urea in deionized water; the precursor acquisition is to heat the mixed solution to perform a self-propagating reaction, so as to generate a crystal black precursor; the thermoelectric material preparation is to heat the crystal black precursor to obtain the nanometer granular sodium cobaltate thermoelectric material. The design of the invention is not only few in process links, low in production cost, but also safe in operation, and free of harmful gas generation, can prepare nanometer granular sodium cobaltate, and facilitates sintering of block thermoelectric materials with high quality.

Description

technical field [0001] The invention relates to a nanoscale granular structure sodium cobaltate-NaCo 2 o 4 The preparation method of an oxide-type thermoelectric material belongs to the field of material synthesis, and is specifically applicable to reducing process links and production costs on the basis of producing nano-scale granular sodium cobaltate, and producing no harmful gas. Background technique [0002] Thermoelectric materials are advanced materials that can statically realize the mutual conversion of thermal energy and electrical energy through the movement of carriers. With the improvement of people's awareness of environmental protection and energy saving, there are more and more researches related to thermoelectric materials. There are two broad categories of thermoelectric materials: alloys and oxides. Among them, alloy materials (such as Bi 2 Te 3 , PbTe, etc.), they have high conversion efficiency, and the application effect is better at room temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/00B82Y40/00B82Y30/00
Inventor 杨帆王自昱刘立炳
Owner DONGFENG COMML VEHICLE CO LTD
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