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Thermoelectric material of isotope battery and its preparation method

A technology for isotope batteries and thermoelectric materials, which is applied in the field of preparation of thermoelectric materials, can solve the problems of heavy metal content, high requirements for preparation conditions, discomfort, etc., and achieves the effects of no environmental pollution, simple reaction process and simple preparation.

Inactive Publication Date: 2008-10-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The thermoelectric materials currently being applied and studied are mainly metal compounds, solid solution alloys and semiconductor materials, etc., but these thermoelectric materials have high requirements for preparation conditions and need to be carried out under a certain gas protection, which is not suitable for working at high temperatures and containing paraffin Disadvantages such as heavy metals that are harmful to the human body

Method used

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  • Thermoelectric material of isotope battery and its preparation method
  • Thermoelectric material of isotope battery and its preparation method
  • Thermoelectric material of isotope battery and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Select commercially available sodium nitrate NaNO with a molecular weight of 85.01 3 , cobalt nitrate Co(NO) with a molecular weight of 291.03 3 ) 2 ·6H 2 O, citric acid C with a molecular weight of 210.14 6 h 8 o 7 ·H 2 O was used as a raw reagent. NaNO 3 , Co(NO 3 ) 2 ·6H 2 O, C 6 h 8 o 7 ·H 2 The molar ratio of O is 0.7:1:0.7, wherein, the molar dosage of sodium nitrate is 0.014mol, the molar dosage of cobalt nitrate is 0.02mol, and the molar dosage of citric acid is 0.014mol. Stir at constant temperature until the paste gel forms a citric acid complex.

[0019] Put the citric acid complex into an electric thermostat, and keep the temperature at 120°C for 12 hours, so that the citric acid complex continues to shrink and expand until fully expanded and dried, and then ground into powder to form a precursor.

[0020] Put the precursor into the crucible for pre-firing, start from 150°C, raise the temperature at a rate of 2°C / min, pre-fire at 550°C, and k...

Embodiment 2

[0022] The process of preparing citric acid complexes and precursors is the same as in Example 1. The difference is the molar ratio of the starting materials.

[0023] The molar ratio of the starting material is NaNO 3 : Co(NO 3 ) 2 ·6H 2 O:C 6 h 8 o 7 ·H 2 O=0.5:1:0.5. Its XRD spectrum is as figure 2 shown.

Embodiment 3

[0025] The process of preparing citric acid complexes and precursors is the same as in Example 1. The difference is the molar ratio of the starting materials.

[0026] The molar ratio of the starting material is NaNO 3 : Co(NO 3 ) 2 ·6H 2 O:C 6 h 8 o 7 ·H 2 O=0.3:1:0.5. Its XRD spectrum is as image 3 shown.

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Abstract

The related preparation method comprises: selecting sodium salt and cobalt salt by mole ratio as x:1 to solve into distilled water and add some citric acid with mole quantity equal to Na+, stirring to gel state to form citric complex compound; drying for 6-24h at 100-130Deg, grinding into powder as the predecessor; from 150Deg, heating till 400-600Deg by rate as 1-3Deg / min, pre-burning for 2-6h, pelleting to sinter at 700-950Deg, keeping for 3-24h; cooling naturally to room temperature to obtain the NaxCoO2 material (0 H01L 35 / 22 C04B 35 / 01 C30B 29 / 22 2 4 1 2006 / 6 / 1 1885582 2006 / 12 / 27 100424904 2008 / 10 / 8 2008 / 10 / 8 2008 / 10 / 8 Jilin University 130023 Chen Gang Wang Chunzhong Liu Daliang Zhan Shiying Hu Fang zhang jinglin liu chisheng 22201 The Patent Agency of Jilin University No.83 Liberation Main Street, the City of Changchun, Jilin Province 130023

Description

technical field [0001] The invention relates to a preparation method of a thermoelectric material, in particular to a citrate method preparation method of a thermoelectric material used in an isotope battery. Background technique [0002] Isotope battery is a new type of power source developed in recent years. Compared with other power sources, it has many advantages. For example, long life, compact structure, high specific capacity, reliable operation, no environmental influence, no maintenance and so on. Therefore, it has unique uses in the fields of space, land, sea and medicine. Today, isotope batteries can not only be used as important energy sources for artificial satellites, spacecraft, lunar scientific research stations, and interplanetary stations for exploring outer space, but also can be used as power sources for submarine cable relay stations and deep-water engineering equipment. In medicine, it can be used as a power source for artificial organs such as pacema...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/22C04B35/01C30B29/22
Inventor 陈岗王春忠刘大亮詹世英胡方
Owner JILIN UNIV