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.
10.pdf - Published Version
Restricted to Registered users only
Download (716Kb) | Request a copy
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|
|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|
Actions (login required)