Formation and Sintering Characteristics of Aluminum Borate Whiskers |
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| Authors: | Michael J Readey |
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| Affiliation: | Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 |
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| Abstract: | A boric acid-stabilized aluminum acetate powder was decomposed to aluminum borate (Al18B4O33) by calcining at 1000°C. The powder was then ball-milled, compacted, and fired to temperatures of 1500°, 1600°, and 1700°C for a period of 1 h. The resulting aluminum borate ceramic had a whiskerlike grain morphology, with the whisker length approaching 20 μm and a diameter of 2–3 μm. The sintered compact showed no shrinkage upon firing, had a porosity of ～50%, a narrow pore size distribution, and an average pore size of 1–3 μm. |
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