Standard Historical Last Updated: Mar 12, 2012 Track Document
ASTM C965-96(2007)

Standard Practice for Measuring Viscosity of Glass Above the Softening Point

Standard Practice for Measuring Viscosity of Glass Above the Softening Point C0965-96R07 ASTM|C0965-96R07|en-US Standard Practice for Measuring Viscosity of Glass Above the Softening Point Standard new BOS Vol. 15.02 Committee C14
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Significance and Use

This practice is useful in determining the viscosity-temperature relationships for glasses and corresponding useful working ranges. See Terminology C 162.

Scope

1.1 This practice covers the determination of the viscosity of glass above the softening point through the use of a platinum alloy spindle immersed in a crucible of molten glass. Spindle torque, developed by differential angular velocity between crucible and spindle, is measured and used to calculate viscosity. Generally, data are taken as a function of temperature to describe the viscosity curve for the glass, usually in the range from 1 to 10 6 Pa·s.

1.2 Two procedures with comparable precision and accuracy are described and differ in the manner for developing spindle torque. Procedure A employs a stationary crucible and a rotated spindle. Procedure B uses a rotating crucible in combination with a fixed spindle.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Details
Book of Standards Volume: 15.02
Developed by Subcommittee: C14.04
Pages: 5
DOI: 10.1520/C0965-96R07
ICS Code: 81.040.10