Kumar, Senthil P and Kini, NS and Umarji, AM and Sunandana, CS (2006) Search for a novel zero thermal expansion material: dilatometry of the AgI-CuI system. In: Journal Of Materials Science, 41 (12). pp. 3861-3865.
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Abstract
AgI is a well-known superionic conductor possessing a negative thermal expansion (NTE) coefficient while CuI is a p-type semiconductor possessing a positive thermal expansion coefficient. Pellets of X-Ray Diffraction (XRD) characterized compositions in the AgI-CuI system namely, beta AgI, gamma AgI, Ag0.5Cu0.5I, Ag0.25Cu0.75I, Ag0.10Cu0.90I, Ag0.05Cu0.95I and gamma CuI have been examined by quartz pushrod dilatometry measurements in order to look for a zero thermal expansion material. It is found that the systematic displacement of Ag by Cu gradually reduces the NTE anomaly in AgI. The composition Ag0.25Cu0.75I apparently exhibits near-zero thermal expansion. The results are discussed qualitatively in terms of relevant models.
Item Type: | Journal Article |
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Publication: | Journal Of Materials Science |
Publisher: | Springer Science |
Additional Information: | Copyright of this article belongs to Springer. |
Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
Date Deposited: | 08 Apr 2009 08:53 |
Last Modified: | 19 Sep 2010 04:59 |
URI: | http://eprints.iisc.ac.in/id/eprint/17948 |
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