Unlock instant, AI-driven research and patent intelligence for your innovation.

Measurement method of practical softening point temperature of glass

A softening point temperature, measurement method technology, applied in the investigation stage/state change, material thermal expansion coefficient and other directions, can solve the problems of large error, high dependence on measurement accuracy and accuracy, to reduce measurement error, improve measurement accuracy, cost saving effect

Active Publication Date: 2022-04-15
湖北戈碧迦光电科技股份有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The measurement precision and accuracy of this method are highly dependent on the accuracy of measuring the height change and change rate of the glass during the heating process, which is likely to cause large errors

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
  • Measurement method of practical softening point temperature of glass
  • Measurement method of practical softening point temperature of glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be further described below in conjunction with embodiment, but is not limited to the content on the description.

[0019] 1.1 Instruments and standard samples

[0020] The DIL402PC thermal dilatometer of NETZSCH, Germany, the accuracy of the thermal expansion coefficient and the temperature calorific value of the instrument are corrected by the fused high-purity quartz standard sample of -100 ℃ ~ 900 ℃ provided by the instrument company. The measured standard sample data, temperature and standard Compared with the sample literature database, the uncertainty of the linear thermal expansion coefficient of the instrument measured material is ≤2×10 -7 / °C, temperature uncertainty ≤2°C.

[0021] 1.2 Measurement process

[0022] 1.2.1 Sample requirements: uniform melting without bubbles, stones and crystallization, Φ(5~9)×50mm, and the two end surfaces must be parallel.

[0023] 1.2.2 The expansion coefficient and temperature accuracy of the ther...

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

No PUM Login to View More

Abstract

A method for measuring the practical softening point temperature of glass, which uses the first-order differential analysis of the thermal expansion curve to obtain the best practical softening point temperature of glass; the change amount, change rate and shrinkage rate of this temperature of glass; different heating rates and different sizes of glass The practical softening point temperature of the sample. Through the obtained analysis data, understanding the microstructure change characteristics of the glass near the softening point is beneficial to better formulate the production molding and secondary pressing process and improve product quality.

Description

technical field [0001] The invention relates to glass forming and hot pressing technology, in particular to a method for measuring the practical softening point temperature of glass. Background technique [0002] Glass softening point temperature (ie viscosity is 10 7.6 dPa.s): If the glass sample is higher than this temperature, the density and surface tension will decrease rapidly, and the glass will have spontaneous fluidity (that is, the softening point characteristic of glass). The softening point temperature is the reference temperature for glass molding, solidification and secondary pressing. Therefore, it is very necessary to accurately measure the softening point temperature with fluidity. [0003] At present, the softening point temperature of glass is measured, and most of them are measured by flat-plate viscometer flat-press method. The test principle is: place a glass sample of a specified size under a vertically pressed mandrel, then place it in the center o...

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): G01N25/04G01N25/16
CPCG01N25/04G01N25/16
Inventor 华凯欧玲
Owner 湖北戈碧迦光电科技股份有限公司