ISO 7884-7-1987 玻璃 粘度和粘度固定点 第7部分:用弯梁法测定退火点和应变点

标准号：ISO 7884-7-1987
中文标准名称：玻璃 粘度和粘度固定点 第7部分:用弯梁法测定退火点和应变点
英文标准名称：Glass; Viscosity and viscometric fixed points; Part 7 : Determination of annealing point and strain point by beam bending
标准类型：Q30
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：Q30
国际标准分类号：81.040.10
适用范围：The specified method provides values being useful for specifying the cooling programme in the production of glassware. The annealing point is determined by measuring the rate of midpoint viscous bending of a simple loaded glass beam. The strain point is subsequently determined by an extrapolation method. Annex A provides the formulae for cross-sectional moment of inertia at various cross-section geometries, and annex B shows an example of beam bending apparatus