Rapid solidification method for preparation of Te-doped cubic Ca2Ge

A technology of cubic phase and solidification method, applied in the field of Ca-Ge alloy materials, can solve the problem that Ge material preparation research has not been reported, and achieve the effect of meeting the needs of large-scale production, high density and low reaction temperature

Inactive Publication Date: 2018-07-27
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for Te doped cubic Ca 2 The preparation of Ge materials has not been reported

Method used

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  • Rapid solidification method for preparation of Te-doped cubic Ca2Ge
  • Rapid solidification method for preparation of Te-doped cubic Ca2Ge
  • Rapid solidification method for preparation of Te-doped cubic Ca2Ge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh Ca powder, Ge powder and Te powder respectively at a molar ratio of 82:21:0.5, and mix them evenly under an argon protective atmosphere;

[0029] (2) Vacuum the electromagnetic induction levitation melting furnace, and then fill it with argon, then place the mixture obtained in step (1) in the water-cooled crucible of the electromagnetic induction levitation melting furnace, and raise the temperature to 950 °C to make the Ca in the crucible , Ge and Te are in a molten state, and the surface impurities are removed after smelting for 15 minutes; this operation is repeated 3 times to obtain a molten liquid;

[0030] (3) Put the molten liquid obtained in step (2) in a vacuum quenching furnace, and then fill it with high-purity argon for alloy remelting; then the melt is thrown out by the molybdenum wheel at a linear speed of 25 m / s, Obtain needle-shaped quick-setting powder;

[0031] (4) After the quick-setting powder obtained in step (3) was manually ground and ...

Embodiment 2

[0040] (1) Weigh Ca powder, Ge powder and Te powder respectively at a molar ratio of 82:21:1.5, and mix them evenly under an argon protective atmosphere;

[0041] (2) Vacuumize the electromagnetic induction levitation melting furnace, and then fill it with argon, then place the mixture obtained in step (1) in the water-cooled crucible of the electromagnetic induction levitation melting furnace, and raise the temperature to 1000 °C to make the Ca in the crucible , Ge and Te are in a molten state, and the surface impurities are removed after smelting for 25 minutes; this operation is repeated 4 times to obtain a molten liquid;

[0042] (3) Put the molten liquid obtained in step (2) in a vacuum quenching furnace, and then fill it with high-purity argon for alloy remelting; then the melt is thrown out by the molybdenum wheel at a linear speed of 30 m / s, Obtain needle-shaped quick-setting powder;

[0043](4) After the quick-setting powder obtained in step (3) was manually ground a...

Embodiment 3

[0048] (1) Weigh Ca powder, Ge powder and Te powder respectively at a molar ratio of 82:21:3, and mix them evenly under an argon protective atmosphere;

[0049] (2) Vacuum the electromagnetic induction levitation melting furnace, and then fill it with argon, then place the mixture obtained in step (1) in the water-cooled crucible of the electromagnetic induction levitation melting furnace, and raise the temperature to 1100 °C to make the Ca in the crucible , Ge and Te are in a molten state, and the surface impurities are removed after smelting for 35 minutes; this operation is repeated 5 times to obtain a molten liquid;

[0050] (3) Put the molten liquid obtained in step (2) in a vacuum quenching furnace, and then fill it with high-purity argon for alloy remelting; then the melt is thrown out by the molybdenum wheel at a linear speed of 50 m / s, Obtain needle-shaped quick-setting powder;

[0051] (4) After the quick-setting powder obtained in step (3) was manually ground and s...

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Abstract

The invention discloses a rapid solidification method for preparation of Te-doped cubic Ca2Ge. The method comprises the following steps: respectively weighing Ca powder, Ge powder and Te powder in proportion, and uniformly mixing the powder in an argon protective atmosphere; then, placing the powder into an electromagnetic induction suspension smelting furnace for smelting; placing an obtained molten liquid in a vacuum quick quenching furnace, feeding high-purity argon gas for alloy remelting, and then preparing needle-shaped rapid solidification powder from a melt body; next, grinding and sieving the obtained rapid solidification powder, and performing heating and hot pressing step by step under the vacuum condition to prepare a massive blank; finally, performing hot pressing on the obtained blank to be placed in a vacuum tube furnace, and performing heating for reaction to obtain the Te-doped cubic Ca2Ge. The obtained Te-doped cubic Ca2Ge has fine grains, uniform alloy composition and structure and compact structure, and has good industrialization prospect.

Description

technical field [0001] The invention belongs to the field of Ca-Ge alloy materials, in particular to a Te-doped cubic phase Ca prepared by a rapid solidification method 2 Ge. Background technique [0002] Since the 1950s, the global population has grown rapidly and the economy has developed rapidly. However, with the increase of population and economic development, the energy crisis and environmental pollution problems have become more and more prominent. Therefore, for the sustainable development of the country and the improvement of the living environment of human beings, it is urgent to find some environmentally friendly and earth-rich renewable energy sources to replace the original materials. This will not only solve energy problems but also effectively solve environmental problems. Therefore, the research and development of new energy materials are receiving more and more attention in various countries. [0003] Semiconductor material Ca 2 The excellent thermoelect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C24/00B22F9/10C22C1/04
Inventor 温翠莲谢秋罕张炜坚萨百晟叶健霞韩鹏鹏
Owner FUZHOU UNIV
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