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Disposable thermal telescopic switch material and method for preparing same

A switch material and thermal expansion technology, applied in the direction of thermal switch components, etc., can solve the problems of low temperature, unsatisfactory switching equipment, narrow temperature control range, etc., and achieve the effect of simple preparation method, cheap raw materials, and wide temperature range

Inactive Publication Date: 2006-10-04
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above two alloy materials are only suitable for low temperature control, the temperature range is 138°C∽148°C, the temperature is relatively low, and the temperature control range is narrow, only about 10°C
Switchgear that cannot meet higher temperature requirements

Method used

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  • Disposable thermal telescopic switch material and method for preparing same

Examples

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Effect test

Embodiment 1

[0008] Embodiment 1: La is taken as 1: 2 by molar ratio 2 o 3 (lanthanum oxide) and CeO 2 (Cerium oxide) powders were mixed and ground for 20 minutes, then the sample was heated to 1400°C for 24 hours at a constant temperature, then slowly cooled to room temperature, and the operation was repeated twice, and the synthesized powder sample was pressed into a steel mold at 90 MPa. Strip, sintered at 1450°C. The heat shrinkage curve of this ceramic material is as follows Figure 1 . attached Figure 1 It is the thermal shrinkage curve in the temperature range of Example 1 of the present invention; wherein the abscissa is temperature, and the ordinate is physical expansion coefficient. From embodiment 1 and accompanying drawing, we can find out, the material that this method obtains can make such a kind of switch material: when lower than 204 ℃ the low temperature area needs switch connection, when the temperature is higher than 204 ℃ and lower than 256 A switch material that a...

Embodiment 2

[0009] Embodiment 2: La is taken as 1: 1 by molar ratio 2 o 3 (lanthanum oxide) and CeO 2 (Cerium oxide) powders were mixed and ground for 25 minutes, then the sample was heated to 1200°C for 18 hours at a constant temperature, then slowly cooled to room temperature, and the operation was repeated twice, and the synthesized powder sample was pressed into a steel mold at 120MPa. Strip, sintered at 1550°C.

Embodiment 3

[0010] Embodiment 3: Take La as 1:4 in molar ratio 2 o 3 (lanthanum oxide) and CeO 2 (Cerium oxide) powders were mixed and ground for 30 minutes, then the sample was heated to 1500°C for 12 hours at a constant temperature, then slowly cooled to room temperature, and the operation was repeated twice, and the synthesized powder sample was pressed into a steel mold at 150MPa. Strip, sintered at 1650°C.

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Abstract

The invention is a thermal extension switch material preparing method, selecting rare-earth oxide La2O3 (lanthanum trioxide) and CeO2 (lanthanum dioxide) as raw materials, mixing their powders in the mol ratio of La2O3 to CeO2 is 1:1-4, grinding for 20-30 minutes, heating at 1200-1500 deg.C for 12-14 hours, then grinding and heating thrice according to the conditions as mentioned above, then using a steel mould to press the sample into bars at 90-150MPa, and sintering into the switch material at 1450-1650 deg.C.

Description

technical field [0001] The invention belongs to a preparation method of a thermal expansion switch material. Background technique [0002] Japan Baileman Industry Co., Ltd. discloses a fusible alloy switch. The main components are: Pb (lead), Sn (tin), Sb (antimony), As (arsenic) and Al (aluminum), it has successfully achieved the purpose of controlling the extinguishment of the main burner, but due to the low melting point used as a switch Alloys are expensive and contain arsenic, a highly toxic element, so South China University of Technology has announced a more suitable alloy material in its patent application No. 92103881. A ternary eutectic alloy system is selected, and the composition ratio is as follows: Pb (lead) is 50%∽56% by weight; Sn (tin) is 22%∽26% by weight; Bi (bismuth) is by weight 18%∽24%. The function of controlling the main burner is achieved by reaching the melting point of the alloy system to melt it. However, the above two alloy materials are only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H37/32H01H37/46C04B35/50C04B35/622
Inventor 李佳艳代辉曹学强孟健
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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