Low-Temperature Fine-Grained Alumina–Aluminum Titanate Composites Produced from a Titania-Coated Alumina Precursor |
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| Authors: | Jayasankar Mani Solaiappan Ananthakumar Poothayil Mukundan Krishna Gopakumar Warrier |
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| Affiliation: | Materials and Minerals Division, National Institute for Interdisciplinary Science &Technology (NIST), (Formerly Regional Research Laboratory (CSIR)), Thiruvananthapuram, India |
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| Abstract: | A method for the preparation of alumina–aluminum titanate (AT) composites, which can be sintered to high density with a fine-grained microstructure at <1450°C, is reported. The composite precursor is alumina particles coated by sol–gel-derived titania, which reacts during sintering to form AT in situ at temperature as low as 1300°C. The composite can be sintered at 1350°C to 98% density with 1.5–2.0 μm grain size. Other composites containing 5–50 wt% AT are also investigated. |
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