Glass Viscosity and viscometric fixed points Part 4: Determination of viscosity by beam bending

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

11-26-1987

Publisher

International Organization for Standardization

A method of determining the dynamic viscosity of glass on a rod-shaped test specimen, i.e. a beam, supported at its end is specified. The viscous deflection rate of the beam is measured under given load at the midpoint between the supports. In addition the viscosity-temperature relationship and the dependence of the viscosity on the thermal history of the sample can be determined. The theoretical basis relations and the apparatus including method of measurements are described.

DevelopmentNote	Also numbered as BS 7034-4(1988) (09/2005)
DocumentType	Standard
Pages	12
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
DIN ISO 7884-4:1998-02	Identical

BS ISO 9802:1996	Raw optical glass. Vocabulary
ISO 3585:1998	Borosilicate glass 3.3 Properties
BS ISO 3585:1998	Borosilicate glass 3.3. Properties
ISO 9802:1996	Raw optical glass Vocabulary
BS ISO 12775:1997	Guidelines on types of glass of normal bulk-production composition and their test methods