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Preparation method of thermoelectric material of skutterudite

A thermoelectric material and skutterudite technology, which is applied in the field of rapid preparation of filled skutterudite thermoelectric materials to achieve the effects of shortening the preparation period, cheap performance and stable performance

Active Publication Date: 2015-04-08
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to overcome the defects of existing existing methods for preparing skutterudite thermoelectric materials, and the present invention provides a method for rapidly preparing skutterudite thermoelectric materials

Method used

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  • Preparation method of thermoelectric material of skutterudite
  • Preparation method of thermoelectric material of skutterudite
  • Preparation method of thermoelectric material of skutterudite

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preparation example Construction

[0025] The invention provides a rapid preparation method of skutterudite thermoelectric material, comprising the following main steps:

[0026] (1) Weigh the raw material of skutterudite material, place it in a high-purity graphite crucible, and cover the crucible lid;

[0027] (2) Place the crucible in the quartz tube, vacuumize and seal it to form a quartz ampoule;

[0028] (3) The quartz ampoule is heated by induction, and the raw materials are melted to form a melt uniformly mixed in liquid phase;

[0029] (4) quenching the melt to form an ingot;

[0030] (5) The ingot is pulverized and sintered to obtain a dense skutterudite block thermoelectric material.

[0031] The raw material is placed in a high-purity graphite crucible and covered with a crucible lid to avoid Sb loss and ensure controllable composition; induction melting plus quenching can quickly obtain ingots with fine structure; spark plasma sintering, powder reaction quickly forms skutterudite, saving Anneali...

Embodiment 1

[0049] Yttrium-filled skutterudite (Yb 0.3 co 4 Sb 12 ) rapid preparation method of thermoelectric material, its technological process is as follows figure 1 As shown, the specific steps are as follows:

[0050] (1) Using high-purity granular Co, Sb and Yb as raw materials, according to the chemical formula Yb 0.3 co 4 Sb 12.1 Weighing, the total weight of the raw materials is 20 grams; the weighing raw materials are put into the graphite crucible, and the crucible lid is covered; the crucible and the crucible lid are tightly matched to ensure that the Sb vapor does not escape from the crucible during the melting and synthesis of raw materials;

[0051] (2) The graphite crucible with raw materials is placed in the quartz tube, vacuumized, filled with argon, vacuumized, repeated 3 times, and the quartz tube is sealed to obtain a quartz ampoule;

[0052] (3) Place the above-mentioned quartz ampoule in the center of the induction coil of the electromagnetic induction heatin...

Embodiment 2

[0056] Other steps are the same as in Example 1, the sintering holding time is 15 minutes, and a dense filled skutterudite material is obtained, and the ZT value of the material is 1.15, such as Figure 4 Shown; The extension of the sintering holding time makes the ZT value of the skutterudite material further increased (10%).

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Abstract

The invention relates to a preparation method of a thermoelectric material of skutterudite. The preparation method comprises the following steps: 1) weighing a pure metal serving as a raw material according to a chemical formula of the thermoelectric material of the skutterudite; 2) vacuum sealing the raw material, then adopting electromagnetic induction heating to obtain a uniformly mixed melt, and quenching the melt to obtain an ingot; and 3) grinding the ingot prepared in step 2) into powder, and carrying out spark plasma sintering on the ingot powder to obtain the thermoelectric material of the skutterudite.

Description

technical field [0001] The invention belongs to the field of new energy materials, and relates to a method for rapidly preparing a skutterudite-filled thermoelectric material. Background technique [0002] Thermoelectric power generation technology uses the Seebeck effect of semiconductor materials to directly convert heat energy into electrical energy. It has the characteristics of small system size, compact structure, no moving parts, maintenance-free, no noise, no emissions, high reliability and long life. The detection power supply and special military power supply have obtained important applications, and have broad application prospects and potential economic and social benefits in solar photoelectric-thermoelectric compound power generation, industrial waste heat—especially in the thermoelectric power generation of automobile exhaust waste heat recovery, and may become today's An important part of the solution to the world's energy crisis (Science 283:804, 1999). [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C12/00C22F1/16
Inventor 陈立东姚铮李小亚宋海东
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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