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000023061 0247_ $$2DOI$$a10.1016/j.jallcom.2010.04.198
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000023061 084__ $$2WoS$$aChemistry, Physical
000023061 084__ $$2WoS$$aMaterials Science, Multidisciplinary
000023061 084__ $$2WoS$$aMetallurgy & Metallurgical Engineering
000023061 1001_ $$0P:(DE-HGF)0$$aNugroho, S.$$b0
000023061 245__ $$aSolid-state synthesis and formation mechanism of barium hexaaluminate from mechanically activated Al2O3-BaCO3 powder mixtures
000023061 260__ $$aLausanne$$bElsevier$$c2010
000023061 300__ $$a466 - 471
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000023061 440_0 $$03020$$aJournal of Alloys and Compounds$$v502$$x0925-8388$$y2
000023061 500__ $$aThe first author (SN) gratefully acknowledges the Ministry of Education, Culture, Sports, Science and Technology of Japan, for providing financial support during the study and this research at Tohoku University.
000023061 520__ $$aThe synthesis and formation mechanism of barium hexaaluminate compound (Ba-P-Al2O3) by solid-state reactions between powdered reactants of alumina (Al2O3) and barium carbonate (BaCO3) have been investigated. The processes for synthesizing Ba-beta-Al2O3 phase include mechanically activated milling of Al2O3-BaCO3 powder mixtures and subsequent solid-state reactions at high temperatures. The mechanically activated milling results in a significant decrease in the decomposition temperature of BaCO3, hence promotes its reactions with Al2O3. Almost monophasic Ba-beta-Al2O3 can be synthesized by 9-12 h ball milling, followed by heat treatment at 1500 C for 2 h. The formation of Ba-beta-Al2O3 phase includes three stages: (i) decomposition of BaCO3, (ii) formation and growth of spherical BaO center dot Al2O3 particles, and (iii) reaction between Al2O3 and BaO center dot Al2O3 to form Ba-beta-Al2O3 with an elongated morphology. (C) 2010 Elsevier B.V. All rights reserved.
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000023061 65320 $$2Author$$aOxide materials
000023061 65320 $$2Author$$aBa-beta-Al2O3
000023061 65320 $$2Author$$aHigh-energy planetary ball milling
000023061 65320 $$2Author$$aMechanical activation
000023061 65320 $$2Author$$aSolid-state synthesis
000023061 65320 $$2Author$$aX-ray diffraction
000023061 7001_ $$0P:(DE-HGF)0$$aChen, Z-C.$$b1
000023061 7001_ $$0P:(DE-HGF)0$$aKawasaki, A.$$b2
000023061 7001_ $$0P:(DE-Juel1)VDB77585$$aJarligo, M.O.$$b3$$uFZJ
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000023061 8567_ $$uhttp://dx.doi.org/10.1016/j.jallcom.2010.04.198
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