ASTM C965-96(2017)
Standard Practice for Measuring Viscosity of Glass Above the Softening Point

Standard No.

ASTM C965-96(2017)

Release Date

1996

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM C965-23

Latest

ASTM C965-23

Scope

3.1 This practice is useful in determining the viscosity-temperature relationships for glasses and corresponding useful working ranges. See Terminology C162.

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 10⁶ 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM C965-96(2017) Referenced Document

• ASTM C162 Standard Terminology of Glass and Glass Products*， 1999-04-20 Update
• ASTM E220 Standard Test Method for Calibration of Thermocouples By Comparison Techniques

ASTM C965-96(2017) history

• 2023 ASTM C965-23 Standard Practice for Measuring Viscosity of Glass Above the Softening Point
• 1996 ASTM C965-96(2017) Standard Practice for Measuring Viscosity of Glass Above the Softening Point
• 2012 ASTM C965-96(2012) Standard Practice for Measuring Viscosity of Glass Above the Softening Point
• 1996 ASTM C965-96(2007) Standard Practice for Measuring Viscosity of Glass Above the Softening Point
• 1996 ASTM C965-96(2002) Standard Practice for Measuring Viscosity of Glass Above the Softening Point
• 1996 ASTM C965-96 Standard Practice for Measuring Viscosity of Glass Above the Softening Point