BS 7030:1988

National foreword
Committees responsible
Method
1 Scope and field of application
2 References
3 Definition
4 Apparatus
5 Test specimen
6 Procedure
7 Expression of results
8 Performance test
9 Test report
Annex
   Devices for self-adjusting alignment of specimen and
   push-rod axis
Table
   Coefficient of mean linear thermal expansion alpha Q
   for vitreous silica
Figures
1 Example of a specimen-holding and push-rod assembly
   of a dilatometer working almost vertically
2 Example of a specimen-holding and push-rod assembly
   of a dilatometer working horizontally

Applies to glasses of normal bulk-production compositions but not to fused silica, glass ceramics or other glasses of low linear thermal expansion coefficients.

This International Standard specifies a method for determining the coefficient of mean linear thermal expansion of glass in the elastic solid-like state, well below the transformation temperature (see ISO 7884-8).

This International Standard applies to all glasses of normal bulk-production compositions. It does not apply to fused silica, glass ceramics or other glasses of similarly low linear thermal expansion coefficients.