Method for measuring thermal expansion coefficient of ultralow-expansion glass

A technology of thermal expansion coefficient and expansion glass, which is applied in measuring devices, processing detection response signals, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve the problems of time-consuming and labor-consuming measurement, and the destructiveness of ultra-low expansion glass, etc., to achieve The effect of improving detection efficiency

Pending Publication Date: 2020-07-03
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a new measurement method based on the destructiveness of the ultra-low expansion glass and the time-consuming and labor-intensive measurement of the

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  • Method for measuring thermal expansion coefficient of ultralow-expansion glass
  • Method for measuring thermal expansion coefficient of ultralow-expansion glass
  • Method for measuring thermal expansion coefficient of ultralow-expansion glass

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Embodiment Construction

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] figure 1 It is a schematic flow chart of the method for measuring the thermal expansion coefficient of ultra-low expansion glass based on water immersion ultrasonic pulse echo in the present invention. The water immersion ultrasonic detection method is used to obtain the ultrasonic propagation velocity at the required measurement position of the ultra-low expansion glass sample to be tested. Substituting the linear mathematical expression be...

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Abstract

The invention relates to a method for measuring the thermal expansion coefficient of ultralow-expansion glass, and belongs to the technical field of ultrasonic detection. Ultrasonic propagation ratesat different positions of a radial mark of the ultralow-expansion glass are measured by using a water immersion type ultrasonic pulse echo method so as to achieve the measurement of the thermal expansion coefficient of the ultralow-expansion glass. The thermal expansion coefficient and the ultrasonic propagation rate of the ultralow-expansion glass are related to the TiO2 content in the glass, related researches show that the thermal expansion coefficient [alpha] of the ultralow-expansion glass and the ultrasonic propagation rate V are in a linear relationship, so that the thermal expansion coefficients at different positions can be deduced by measuring the ultrasonic propagation rates at different positions of the ultralow-expansion glass.

Description

technical field [0001] The invention relates to a method for measuring the thermal expansion coefficient of ultra-low expansion glass based on water immersion ultrasonic pulse echo, which belongs to the technical field of ultrasonic detection and can be used to quickly and non-destructively measure the thermal expansion coefficient of ultra-low expansion glass. Background technique [0002] Ultra-low expansion glass has the following advantages: (1) The coefficient of thermal expansion (CTE) is close to zero, which ensures that it has good dimensional stability in harsh temperature environments; (2) It has good optical processability and is easy to obtain High-quality optical surface shape; (3) Different from glass-ceramic, which is composed of glass phase and microcrystalline phase, ULE is a uniform glass single-phase material with stable composition, so it has excellent thermal processing performance, can be spliced ​​and processed, and is easy to apply to Large-scale deve...

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Application Information

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IPC IPC(8): G01N29/07G01N29/28G01N29/44
CPCG01N29/07G01N29/28G01N29/44G01N2291/011G01N2291/0232G01N2291/044
Inventor 刘红程云涛魏文卿徐涛张媛媛
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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