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Method for producing a thermoelectric intermetallic compound

A technology of intermetallic compounds and mixtures, applied in the field of thermoelectrics, can solve problems such as reducing the magnitude of k1

Inactive Publication Date: 2011-01-19
BIOMETRIC TECH SOLUTIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The generation of low-frequency phonon modes increases phonon-phonon scattering, which in turn reduces k 1 the magnitude of

Method used

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  • Method for producing a thermoelectric intermetallic compound
  • Method for producing a thermoelectric intermetallic compound
  • Method for producing a thermoelectric intermetallic compound

Examples

Experimental program
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Embodiment

[0122] Compound Z was synthesized from high-purity starting ingots of La, Ce, Yb, Fe, Co, and Sb purchased from Sigma Aldrich 1-x Yb x Fe 4 Sb 12 and Z 1-x Yb x Fe 3.9 co 0.01 Sb 12 (Z = Ce, La). The stoichiometric mixture of these reactants is then sealed in a vacuum (-6 mbar) in a quartz tube. The sample was then heated very slowly to 400°C at a ramp rate of 0.5° / min. The samples were kept at this temperature for 48 hours. Then the temperature was raised to 700°C for one week. Finally, the sample was quenched to room temperature.

[0123] Each of the resulting samples was then pressed into pellets and induction melted. Excess Yb and Sb were added before melting. The resulting dense pellets were then annealed at 700°C for 24 hours.

[0124] Phase formation was confirmed by X-ray powder diffraction and microscopy / compositional analysis was performed using SEM / EDX techniques. The measurement of resistance as a function of temperature is performed using the DC fou...

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Abstract

A method for producing an intermetallic compound, the method comprising: (1) providing components A, B and X; and forming by solid state reaction of components A, B and X an intermetallic compound having a filled skutterudite structure and formula of AaBbXc; (2) melting the intermetallic compound having a filled skutterudite structure produced in step (1) in the presence of additional X; and (3) annealing the intermetallic compound of step (2) in the presence of additional X at a temperature equal to, or greater than the phase formation temperature of the intermetallic compound.

Description

[0001] The invention relates to the field of thermoelectrics, in particular to an intermetallic compound and a preparation method thereof. These materials can utilize thermal gradients to generate electricity or can be electrically driven for heating / cooling applications. Background of the invention [0002] Increased awareness of environmental issues has led to a desire to increase energy efficiency in energy production methods. The production, development, and use of thermoelectric materials have attracted considerable attention. Thermoelectric materials convert heat flow into electric current and vice versa. Accordingly, such materials have been sought for use in extracting energy from hot exhaust gases to generate electricity from the environment, such as power station cooling towers. Other practical uses already envisioned include applications to generate nuclear thermoelectricity for powering spacecraft where solar energy is not feasible. Thermoelectricity and thus th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C12/00C22C1/00H01L35/18H10N10/01H10N10/851H10N10/853
CPCH01L35/18C22C12/00C22C1/00H10N10/853
Inventor 马兹哈尔·阿利·巴里
Owner BIOMETRIC TECH SOLUTIONS
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