A new DTA method for measuring critical cooling rate for glass formation

摘要

A new differential thermal analysis (DTA) experimental method has been developed to determine the critical cooling rate for glass formation. R-c The method, which is found especially Suitable for melts that, upon cooling, have a small heat of crystallization or a very slow crystallization rate, has been verified using a 38Na(2)O 62SiO(2) (mol%) melt with a known R-c(similar to 19 degrees C/min), then used to determine R-c for two complex lithium silicate glass forming melts, The new method is rapid, easy to conduct and yields values for R-c that are in excellent agreement with the R-c values measured by standard DTA techniques, (c) 2005 Elsevier B.V. All rights reserved.