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Production of non-mercury clinical thermometer and liquid alloy temperature carrier therefor

A liquid alloy, thermometer technology, used in thermometers, thermometers based on material expansion/contraction, instruments, etc., can solve the problems of difficult control and implementation, poor reliability and repeatability, etc. The effect of liquid stability

Active Publication Date: 2008-02-13
东阿阿华医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, this method is difficult to control and implement, and its reliability and repeatability are also poor

Method used

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  • Production of non-mercury clinical thermometer and liquid alloy temperature carrier therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Under the protection of Ar gas or in a vacuum state, gallium indium tin potassium sodium lithium alloy is heated and melted, and the silver white liquid alloy is prepared by filtration, which is ready for use.

[0024] Take a glass capillary with an inner diameter of Φ0.06mm, and evacuate the inner wall to 10 -2 Atmospheric pressure, use the flame tip of a gas blowtorch to heat the capillary in the small area of ​​the capillary to be constricted to soften the inner wall of the bubbling, and use a 100-fold projector to observe and control the size of the bubbling. When the small bubbles bulge to the opposite tube wall, that is Turn off heat. Ensure that the capillary forms a vesicle-like necking structure.

[0025] The lower end of the constricted part of the capillary is connected with the glass spherical cylinder by using lamp technology to form a glass tube body with an opening at one end of the thermometer.

[0026] Under high vacuum (10 -6 Atmospheric pressure) U...

Embodiment 2

[0029] The weight percent of the liquid alloy temperature carrier is composed of Ga 65, In 20, Sn 11, Na-K 3.5 and Li 0.5. The diameter of the glass capillary is 0.05 mm, and the rest are the same as in Example 1.

Embodiment 3

[0031] The weight percent of the liquid alloy temperature carrier is Ga 70, In 15, Sn 13.95, Na-K1, Li 0.05. The diameter of the glass capillary is 0.08mm, and the others are the same as in Example 1.

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PUM

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Abstract

A liquid-alloy temperature carrier used in thermometer of mercury free type is featured as applying low melting point of Ga-In-Sn-K-Na-Li alloy as stabilized liquid temperature carrier at temperature of 5-42DEG C; preparing said alloy by wt% as Ga of 65-80, In of 3-20,Sn of 1-15, Na and K of 0.001-5 and Li of 2.0; applying Na-K weight ratio as 21.6:78.4. The method for preparing said thermometer is also disclosed.

Description

technical field [0001] The invention relates to a liquid alloy temperature carrier for a mercury-free thermometer and a preparation method for the thermometer, belonging to the field of medical thermometers. Background technique [0002] Mercury is used as a thermometer as a temperature carrier. Since the use of mercury with high toxicity will harm the environment and human body, the use outside the mouth has been restricted. Mercury-free thermometers have broad application prospects. [0003] Now both at home and abroad are committed to developing mercury-free thermometers, but the liquid alloy carrier that can effectively replace mercury is a major technical key. Patent CN1039162C proposes a liquid alloy temperature carrier containing Ga65-95, In5-22, Sn0-11, Sb0-2, Bi0-2, and patent CN1142415C proposes a composition (wt%) of Ga50-67, In23-30 , Sn6-16, Cs0.01-10, Rb0.01-10, Zn0.5-5 low eutectic liquid alloy can be used as thermometer temperature carrier. They have lower...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K5/22C22C28/00G01K13/20
Inventor 王卫建刘培银
Owner 东阿阿华医疗科技有限公司
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