Effect of micro-cracking on the thermal conductivity and thermal expansion of tialite (Al2TiO5) ceramics
The pure and magnesium silicate (Mg2+/Si4+) doped tialite ceramics were prepared from the homogenized mixture of alumina and titania by uniaxial pressing and pressure-less sintering at 1550 °C in air. Thermal conductivity and thermal expansion of the doped and undoped tialite ceramics were measured...
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| Format: | Article |
| Language: | English |
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University of Novi Sad
2013-09-01
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| Series: | Processing and Application of Ceramics |
| Subjects: | |
| Online Access: | http://www.tf.uns.ac.rs/publikacije/PAC/pdf/PAC%2021%2007.pdf |
| _version_ | 1818155428576493568 |
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| author | Ramanathan Papitha Madireddy Buchi Suresh Dibakar Das Roy Johnson |
| author_facet | Ramanathan Papitha Madireddy Buchi Suresh Dibakar Das Roy Johnson |
| author_sort | Ramanathan Papitha |
| collection | DOAJ |
| description | The pure and magnesium silicate (Mg2+/Si4+) doped tialite ceramics were prepared from the homogenized mixture of alumina and titania by uniaxial pressing and pressure-less sintering at 1550 °C in air. Thermal conductivity and thermal expansion of the doped and undoped tialite ceramics were measured from 30 to 700
°C. The identical trend in the behaviour of these thermal properties most probably is influenced by the population, size and shape of microcracks present throughout the grain and grain boundaries as complemented by the microstructural observations. The observed decrease in thermal properties of the doped in comparison to
the pure tialite can be attributed to the substitutional Mg2+ and Si4+ at Al3+ site in Al2TiO5 which promotes the phonon scattering and causes modifications in micro-crack density and the morphology of the cracks. |
| first_indexed | 2024-12-11T14:42:15Z |
| format | Article |
| id | doaj.art-77701a96b2a94876933958eb2cde7c55 |
| institution | Directory Open Access Journal |
| issn | 1820-6131 1820-6131 |
| language | English |
| last_indexed | 2024-12-11T14:42:15Z |
| publishDate | 2013-09-01 |
| publisher | University of Novi Sad |
| record_format | Article |
| series | Processing and Application of Ceramics |
| spelling | doaj.art-77701a96b2a94876933958eb2cde7c552022-12-22T01:01:51ZengUniversity of Novi SadProcessing and Application of Ceramics1820-61311820-61312013-09-017314314610.2298/PAC1303143PEffect of micro-cracking on the thermal conductivity and thermal expansion of tialite (Al2TiO5) ceramicsRamanathan Papitha0Madireddy Buchi Suresh1Dibakar Das2Roy Johnson3International Advanced Research Centre for Powder Metallurgy and New Materials, Hyderabad 500005 IndiaInternational Advanced Research Centre for Powder Metallurgy and New Materials, Hyderabad 500005 IndiaSchool of Engineering Sciences and Technology (SEST), University of Hyderabad, Hyderabad 500046, IndiaInternational Advanced Research Centre for Powder Metallurgy and New Materials, Hyderabad 500005 IndiaThe pure and magnesium silicate (Mg2+/Si4+) doped tialite ceramics were prepared from the homogenized mixture of alumina and titania by uniaxial pressing and pressure-less sintering at 1550 °C in air. Thermal conductivity and thermal expansion of the doped and undoped tialite ceramics were measured from 30 to 700 °C. The identical trend in the behaviour of these thermal properties most probably is influenced by the population, size and shape of microcracks present throughout the grain and grain boundaries as complemented by the microstructural observations. The observed decrease in thermal properties of the doped in comparison to the pure tialite can be attributed to the substitutional Mg2+ and Si4+ at Al3+ site in Al2TiO5 which promotes the phonon scattering and causes modifications in micro-crack density and the morphology of the cracks.http://www.tf.uns.ac.rs/publikacije/PAC/pdf/PAC%2021%2007.pdftialite ceramicssolid state synthesisthermal conductivitythermal expansion |
| spellingShingle | Ramanathan Papitha Madireddy Buchi Suresh Dibakar Das Roy Johnson Effect of micro-cracking on the thermal conductivity and thermal expansion of tialite (Al2TiO5) ceramics Processing and Application of Ceramics tialite ceramics solid state synthesis thermal conductivity thermal expansion |
| title | Effect of micro-cracking on the thermal conductivity and thermal expansion of tialite (Al2TiO5) ceramics |
| title_full | Effect of micro-cracking on the thermal conductivity and thermal expansion of tialite (Al2TiO5) ceramics |
| title_fullStr | Effect of micro-cracking on the thermal conductivity and thermal expansion of tialite (Al2TiO5) ceramics |
| title_full_unstemmed | Effect of micro-cracking on the thermal conductivity and thermal expansion of tialite (Al2TiO5) ceramics |
| title_short | Effect of micro-cracking on the thermal conductivity and thermal expansion of tialite (Al2TiO5) ceramics |
| title_sort | effect of micro cracking on the thermal conductivity and thermal expansion of tialite al2tio5 ceramics |
| topic | tialite ceramics solid state synthesis thermal conductivity thermal expansion |
| url | http://www.tf.uns.ac.rs/publikacije/PAC/pdf/PAC%2021%2007.pdf |
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