EFFECT OF LITHIUM ADDITION ON DENSITY AND OXIDE-PHASE MORPHOLOGY OF AG-ZNO ELECTRICAL CONTACT MATERIALS

Authors
JOSHIA PB KRISHNAN PS PATEL RH GADGEEL VL RAMAKRISHNAN P KAUSHIK VK
Citation
Pb. Joshia et al., EFFECT OF LITHIUM ADDITION ON DENSITY AND OXIDE-PHASE MORPHOLOGY OF AG-ZNO ELECTRICAL CONTACT MATERIALS, Materials letters, 33(3-4), 1997, pp. 137-141
Citations number
16
Categorie Soggetti
Material Science","Physics, Applied
Journal title
Materials letters → ACNP
ISSN journal
0167577X
Volume
33
Issue
3-4
Year of publication
1997
Pages
137 - 141
Database
ISI
SICI code
0167-577X(1997)33:3-4<137:EOLAOD>2.0.ZU;2-1
Abstract
The effect of trace additions of lithium as lithium nitrate, to spray- coprecipitated silver-zinc oxide powder, on density and oxide-phase mo rphology of Ag-ZnO contact materials has been investigated. The Li-tre ated powders are characterized by particle size analyser and ESCA. The pressed-sintered-hot pressed compacts with and without Li are evaluat ed for density, microhardness, electrical conductivity and microstruct ure. The morphological evaluation of ZnO phase is done using quantitat ive image analysis technique. The mechanism of activation due to Li an d the resultant changes in oxide-phase morphology for Ag-ZnO composite system are analysed. (C) 1997 Elsevier Science B.V.