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FIRED ALUMINA PRODUCT, METHOD FOR MANUFACTURING FIRED ALUMINA PRODUCT AND FINE amp;alpha; ALUMINA POWDER OBTAINED BY USING FIRED ALUMINA PRODUCT
FIRED ALUMINA PRODUCT, METHOD FOR MANUFACTURING FIRED ALUMINA PRODUCT AND FINE amp;alpha; ALUMINA POWDER OBTAINED BY USING FIRED ALUMINA PRODUCT
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机译：铝矾土产品，制造铝矾土产品的方法和精细α使用铝粉制品获得的铝粉
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摘要
PROBLEM TO BE SOLVED: To provide α alumina powder which easily yields a dense sintered compact, a fired alumina product for manufacturing the same, and a method for manufacturing the fired alumina product.;SOLUTION: The fired alumina product is characterized in that its BET specific surface area is 10 to 20 m2/g, its main crystalline phase is an α phase and does not substantially contain a θ phase and its average grain size is ≤0.5 μ. The method for manufacturing the fired alumina product is characterized in that an α alumina precursor not substantially containing metal elements exclusive of aluminum is fired in an atmosphere of ≤600 Pa in partial pressure of steam. The fine α alumina powder is characterized in that its purity is ≥99.99% and its BET specific surface area is ≥15 m2/g, intermediate alumina is not substantially included and the relative density of the sintered compact obtained by sintering at 1,250°C under atmospheric pressure is ≥95%.;COPYRIGHT: (C)2004,JPO
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机译：要解决的问题：提供＆alpha;容易产生致密的烧结体的氧化铝粉末，用于制造该氧化铝粉末的烧结氧化铝产品以及该烧结氧化铝产品的制造方法;解决方案：该烧结氧化铝产品的特征在于其BET比表面积为10至20 m 2 / g，其主要结晶相为＆alpha;相，并且基本上不包含＆相并且其平均晶粒尺寸为±0.5μ。煅烧氧化铝产品的制造方法的特征在于α为-。基本上不含铝的金属元素的氧化铝前体在蒸汽分压为600 Pa的气氛中烧制。罚款＆alpha;氧化铝粉末的特征在于其纯度为≥99.99％并且BET比表面积为≥15m 2 / g，基本上不包括中间氧化铝并且获得了烧结体的相对密度。于常压下在1,250°C烧结时的产率为95％。;版权所有：（C）2004，日本特许厅
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