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Standard Practice for Measuring Viscosity of Glass Above the Softening Point
STANDARD published on 1.3.2012
Designation standards: ASTM C965-96(2012)
Note: WITHDRAWN
Publication date standards: 1.3.2012
SKU: NS-15879
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
concentric cyclinders method, glass, viscosity , Furnaces, Glass, Spindle torque, Torque, Viscosity, ICS Number Code 81.040.10 (Raw materials and raw glass)
Significance and Use | ||||
This practice is useful in determining the viscosity-temperature relationships for glasses and corresponding useful working ranges. See Terminology C162. |
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1. 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 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 and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||
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