Fabrication of Alumina Ceramics Using Transition Alumina Powders.
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Accession number;03A0820487
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| Title;Fabrication of Alumina Ceramics Using Transition Alumina Powders. |
| Author;
YAJIMA YOICHI
(Ind. Res. Inst. of Nagano)
HIDA MASAHIRO
(Shinshu Univ., Fac. Engineering, JPN)
TARUTA SEIICHI
(Shinshu Univ., Fac. Engineering, JPN)
KITAJIMA KUNIO
(Shinshu Univ., Fac. Engineering, JPN)
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Journal Title;Naganoken Kogyo Shikenjo Kenkyu Hokoku
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Journal Code:Y0010A
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ISSN:0913-672X
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VOL.;NO.23;PAGE.14-19(2003)
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| Figure&Table&Reference;FIG.6, TBL.2, REF.11 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Transition alumina powders were prepared from polyhydroxoaluminum (PHA) gels by calcining and then grinding by a planetary ball mill. The PHA gels were transformed into transition aluminas consisted of .GAMMA.- and .CHI.-alumina at 800-950.DEG.C. and partly into a-alumina at 1000.DEG.C.. Using the sample powders thus prepared, alumina ceramics were densified by spark plasma sintering (SPS). The sintered compact obtained by SPS had a higher density of more than 99% of theoretical density. The inclusion of fine a-alumina particles, which were derived from wet grinding abrasion powders with wearing in planetary ball milling, had a significant effect on densification due to the seeding effect, decreasing the .GAMMA.- to a-alumina transformation temperature. (author abst.) |
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