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Single crystal zinc antimonide nano comb with high thermoelectric figure of merit and preparation method thereof

A zinc antimonide and nanotechnology, applied in the field of new energy thermoelectric conversion materials, can solve the problem that the highest ZT value of the product cannot reach 1.5, and achieve the effects of reduced thermal conductivity, high controllability, and simple preparation process

Inactive Publication Date: 2011-11-23
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the highest ZT value of the resulting product does not reach 1.5

Method used

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  • Single crystal zinc antimonide nano comb with high thermoelectric figure of merit and preparation method thereof
  • Single crystal zinc antimonide nano comb with high thermoelectric figure of merit and preparation method thereof
  • Single crystal zinc antimonide nano comb with high thermoelectric figure of merit and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Put 9.72 g of high-purity precursor powder ZnO in a ceramic boat and place it in the middle of the quartz tube in the tube furnace.

[0031] (2) 5.84 g of Sb 2 o 3 , 7.80 grams of Zn are put into the middle part of the Kipp generator, and 60ml of H with a mass concentration of 15% 2 SO 4 Add it into the spherical funnel of the Kip generator, open the valve of the Kip generator, and react to get H 3 Sb gas.

[0032] (3) Fill the above-mentioned gas into the quartz tube in the tube furnace, raise the temperature from room temperature to 550°C at a rate of 20°C / min, keep the temperature at 550°C for 30 minutes, and feed nitrogen as the transport gas at the same time, with a flow rate of 300 cm 3 / min, and then the system is naturally cooled to room temperature to obtain the material of the present invention. At 675K, the thermal conductivity is 0.350 W / m·K, and the ZT value is 1.51. The hair length of the nanocomb is about 1.4 μm, and the width is about 0.5-0.8 μm...

Embodiment 2

[0034] (1) Put 4.86 g of high-purity precursor powder ZnO in a ceramic boat and place it in the middle of the quartz tube in the tube furnace.

[0035] (2) 2.92 g of Sb 2 o 3 , 3.90 grams of Zn into the middle of the Kipp generator, 30ml of 15% H 2 SO 4 Add it into the spherical funnel of the Kip generator, open the valve of the Kip generator, and react to get H 3 Sb gas.

[0036] (3) Fill the above gas into the quartz tube in the tube furnace through the tube, raise the temperature from room temperature to 550 °C at a rate of 20 °C / min, keep the temperature at 550 °C for 30 min, and feed nitrogen as the transport gas at the same time, the flow rate is 300cm 3 / min, and then the system was naturally cooled to room temperature to obtain single-crystal ZnSb nanocombs. At 675K, the thermal conductivity is 0.350 W / m·K, and the thermoelectric figure of merit is 1.51. The hair length of the nanocomb is about 1.4 μm, and the width is about 0.5-0.8 μm.

Embodiment 3

[0038] (1) Put 2.43 g of high-purity precursor powder ZnO in a ceramic boat and place it in the middle of the quartz tube in the tube furnace.

[0039] (2) 2.92 g of Sb 2 o 3 , 3.90 grams of Zn into the middle of the Kipp generator, 30ml of 15% H 2 SO 4 Add it into the spherical funnel of the Kip generator, open the valve of the Kip generator, and react to get H 3 Sb gas.

[0040] (3) Fill the above gas into the quartz tube in the tube furnace, raise the temperature from room temperature to 550 °C at a rate of 20 °C / min, keep the temperature at 550 °C for 30 min, and feed nitrogen as the transport gas at the same time, with a flow rate of 300 cm 3 / min, and then the system was naturally cooled to room temperature to obtain single-crystal ZnSb nanocombs. At 675K, the thermal conductivity is 0.350 W / m·K, and the thermoelectric figure of merit is 1.51. The hair length of the nanocomb is about 1.4 μm, and the width is about 0.5-0.8 μm.

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Abstract

The invention belongs to the technical field of new energy thermoelectric conversion materials, in particular to relates to a single crystal zinc antimonide nano comb with a high thermoelectric figure of merit and a preparation method thereof. The thermoelectric figure of merit of the single crystal zinc antimonide nano comb is higher than or equal to 1.50. Compared with the traditional zinc antimonide, the zinc antimonide nano comb provided by the invention has the advantages of higher thermoelectric figure of merit, greatly-reduced thermal conductivity, simple preparation process, low requirement for equipment and high degree of controllability.

Description

technical field [0001] The invention belongs to the technical field of new energy thermoelectric conversion materials, and in particular relates to a single-crystal zinc antimonide nano-comb with high thermoelectric merit and a preparation method thereof. Background technique [0002] The thermoelectric conversion efficiency of thermoelectric materials depends on the dimensionless thermoelectric figure of merit (ZT) , T is the absolute temperature, is the Seebeck coefficient, is the conductivity, is the thermal conductivity and is equal to the lattice thermal conductivity and carrier thermal conductivity Sum( , is the Lorenz constant). reduce , increase and are three ways to improve the ZT value, but , and are generally associated. usually, decrease decrease, increase time significantly reduced. How to coordinate regulation , and , achieving a substantial increase in the ZT value has always been the goal pursued by thermoelectric ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/52C30B29/62C30B1/10C22C12/00C22C1/00H01L35/18H01L35/34C01B6/06B01J7/02H10N10/01H10N10/853
Inventor 周少敏吴小平
Owner HENAN UNIVERSITY