Properties of lead zirconate-alumina 'nanocomposites'
Microstructures, Vickers hardness and dielectric properties of PbZrO3 ceramics with co-additions of 0.5-5 vol% Al2O3 nanoparticles have been investigated. The additive inhibited grain growth, with average grain size decreasing from ∼13 μm for PbZrO3 to ∼1 μm for the nanocomposites. The mode of fract...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-34247544700&partnerID=40&md5=867233d7eb4a0a95c2722e3a6b5078b8 http://cmuir.cmu.ac.th/handle/6653943832/5227 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | Microstructures, Vickers hardness and dielectric properties of PbZrO3 ceramics with co-additions of 0.5-5 vol% Al2O3 nanoparticles have been investigated. The additive inhibited grain growth, with average grain size decreasing from ∼13 μm for PbZrO3 to ∼1 μm for the nanocomposites. The mode of fracture also changed, from predominantly inter-granular in PbZrO3 to a mixed-mode of intra- and inter-granular fracture in the composite samples. Vickers hardness values increased from 2.9 GPa for PbZrO3 to 4.1 GPa for the sample with 1 vol% Al2O3, but there was a more gradual increase for higher Al2O3 contents. Plots of relative permittivity versus temperature indicated subtle differences which were attributed to a chemical reaction between the additive and matrix during sintering. X-ray powder diffraction showed that lead aluminium oxides were the principal products of this reaction. © 2006 Elsevier Ltd. All rights reserved. |
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