A non-destructive testing method for hydroxyl content in quartz glass

A quartz glass and non-destructive testing technology, applied in the direction of color/spectral characteristic measurement, etc., can solve problems such as product damage and difficult processing, and achieve the effect of simplifying the measurement steps, reducing difficulty, and improving accuracy

Active Publication Date: 2021-02-09
CHINA BUILDING MATERIALS ACAD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, in order to test the hydroxyl content of quartz glass products, it is necessary to sample the product and process it to a specified thickness range, especially because of the high hydroxyl content of synthetic quartz glass, when testing synthetic quartz glass, it needs to be processed to 0.4~ With a thickness of 0.7mm, the sample is very thin and difficult to process, and the sampling process will cause damage to the product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A non-destructive testing method for hydroxyl content in quartz glass
  • A non-destructive testing method for hydroxyl content in quartz glass
  • A non-destructive testing method for hydroxyl content in quartz glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] This example provides the extinction coefficient ε of hydroxyl groups in quartz glass at 1.38 μm and 2.22 μm 1.38μm , ε 2.22μm calculation method.

[0099] In this embodiment, the quartz glass is synthetic quartz glass with a thickness of 1mm.

[0100] In this embodiment, the spectral transmittance curve of quartz glass in the wavelength range of 1000nm to 3200nm is as follows figure 1 shown. figure 1 The baseline spectral transmittance T at the positions of 2.73μm, 2.22μm and 1.38μm 0 See Table 1 for the absorption peak spectral transmittance T.

[0101] Table 1 figure 1 T at the positions of 2.73μm, 2.22μm and 1.38μm 0 and T

[0102]

[0103] In this embodiment, the extinction coefficient ε of the hydroxyl group in quartz glass at 2.73 μm is selected. 2.73μm Value 80.1L·mol -1 cm -1 , calculated according to the second formula, the extinction coefficient ε of the hydroxyl group in quartz glass at 1.38 μm is obtained 1.38μm 0.45Lmol -1 cm -1 ; Accordin...

Embodiment 2

[0112] This embodiment provides a non-destructive testing method for hydroxyl content in synthetic quartz glass.

[0113] The thickness of the synthetic quartz glass 1 in this embodiment is 5.25 mm.

[0114] In this embodiment, the spectral transmittance curve of synthetic quartz glass 1 in the wavelength range of 1000nm to 3200nm is as follows figure 2 shown.

[0115] If the detection method of hydroxyl content in quartz glass recorded in the prior art GB / T 12442-90 is adopted, since the thickness of synthetic quartz glass 1 in this embodiment is 5.25mm, it has exceeded the thickness of artificial quartz glass specified in this standard by 0.4- 0.7mm, and, by figure 2 It can be seen that the synthetic quartz glass 1 of this embodiment cannot display the spectral peak at 2.73 μm, so the method described in GB / T12442-90 cannot be used for detection.

[0116] figure 2 The baseline spectral transmittance T at the position of 2.22μm and 1.38μm 0 And the absorption peak spe...

Embodiment 3

[0121] This embodiment provides a non-destructive testing method for hydroxyl content in synthetic quartz glass.

[0122] In this embodiment, the thickness of the synthetic quartz glass 2 is 11 mm.

[0123] In this embodiment, the spectral transmittance curve of the synthetic quartz glass 2 in the wavelength range of 1000nm to 3200nm is as follows image 3 shown. image 3 The baseline spectral transmittance T at the position of 2.22μm and 1.38μm 0 And the absorption peak spectral transmittance T is shown in Table 3.

[0124] table 3 image 3 T at the positions of 1.38μm and 2.22μm in 0 and T

[0125]

[0126] With the extinction coefficient ε obtained in embodiment 1 2.22μm , The baseline spectral transmittance T at the position of 2.22μm 0 and the absorption peak spectral transmittance T are substituted into the first formula described, and the calculation obtains that the hydroxyl content of the synthetic quartz glass 2 in the present embodiment is 1469ppm; the ex...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a nondestructive detection method for hydroxyl content in quartz glass. The nondestructive detection method comprises the following steps of obtaining extinction coefficients<epsilon> 1.38[mu]m, <epsilon> 2.22[mu]m and / or <epsilon> 2.73[mu]m in positions of 1.38[mu]m, 2.22[mu]m and / or 2.73[mu]m of hydroxyl in the quartz glass; and obtaining the hydroxyl content in to-be-detected quartz glass through calculation according to a first formula, wherein the first formula is a formula as shown in the specification. By adoption of the nondestructive detection method for hydroxyl content in quartz glass provided by the invention, the thickness limit of a quartz glass detection sample is expanded, so that the hydroxyl content of certain products can be measured without damaging the sample sampling; and by virtue of the method, nondestructive detection is achieved, and the detection efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of glass detection, in particular to a nondestructive detection method for hydroxyl content in quartz glass. Background technique [0002] Quartz glass is widely used because of its high purity, low thermal conductivity, excellent thermal shock resistance, high deformation temperature and softening temperature, wide optical transmission ability and other comprehensive properties that other materials do not have. It is used in many fields such as electric light source, infrared optics, laser engineering and aerospace engineering. [0003] Quartz glass is made of a single [SiO 4 ] composed of glass, hydroxyl (OH) is the main impurity component of quartz glass, is an important factor affecting the performance of quartz glass. When used in the field of electric light sources, high hydroxyl content will seriously affect the service life of electric light sources, so the content of hydroxyl groups should be controlled and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 王蕾向在奎聂兰舰王宏杰贾亚男杜秀蓉
Owner CHINA BUILDING MATERIALS ACAD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap