The thermal expansion of graphite from 15 c. to 800 c.: part I. Experimental
- 1 November 1945
- journal article
- Published by IOP Publishing in Proceedings of the Physical Society
- Vol. 57 (6) , 477-486
- https://doi.org/10.1088/0959-5309/57/6/303
Abstract
The variation with temperature of the a and c unti-cell dimensions of hexagonal Ceylon graphite has been measured over the temperature range 15°-800°c. by the X-ray powder method. At 14°6c., a=2.4562±0.0001 kx. c=6.6943±0.0007 kx. The carbon-carbon bond length, C-C=1.4210±0.0001a. The a dimension shows a slight contraction up to about 400°c., a small expansion occurring above this temperature. The thermal expansion in the c direction is large; the average value for a over the temperature range is 28.3 × 10-6. The complex nature of the expansion in both directions is discussed qualitatively.Keywords
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