Active standard | Published: 26/11/1987

ISO 7884-4:1987

Glass — Viscosity and viscometric fixed points — Part 4: Determination of viscosity by beam bending
(Verre — Viscosité et points viscosimétriques fixes — Partie 4: Détermination de la viscosité par flexion de barreau)

Available languages: English

Available design: electronic design (pdf), Print design

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Detail information

Designation: ISO 7884-4:1987

Publication date: 26/11/1987

Pages: 12

Country: International technical standard

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Anotation

Description / Abstract: 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.

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