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公开(公告)号:US07691362B2
公开(公告)日:2010-04-06
申请号:US11211700
申请日:2005-08-26
IPC分类号: C01F7/02
CPC分类号: B82Y30/00 , C01F7/30 , C01F7/308 , C01P2004/64 , C01P2006/12
摘要: A method for producing an α-alumina powder is provided. T method for producing an α-alumina powder comprising steps of: (1) pulverizing a metal compound having a full width at half maximum (Ho) of a main peak in XRD pattern to obtain a seed crystal having a full width at half maximum (H) of the main peak in XRD pattern in the presence of pulverizing agent, (2) mixing the obtained seed crystal with an aluminum salt, (3) calcining the mixture, and wherein a ratio of H/Ho is 1.06 or more.
摘要翻译: 提供了α-氧化铝粉末的制造方法。 T制造α-氧化铝粉末的方法,包括以下步骤:(1)以XRD图案粉碎主峰的半峰全宽(Ho)的金属化合物,得到半峰全宽的晶种( H),(2)将得到的晶种与铝盐混合,(3)煅烧混合物,其中H / Ho比为1.06以上。
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公开(公告)号:US20090123363A1
公开(公告)日:2009-05-14
申请号:US12348137
申请日:2009-01-02
申请人: Shinobu Maruno , Hajime Maki , Yoshiaki Takeuchi
发明人: Shinobu Maruno , Hajime Maki , Yoshiaki Takeuchi
IPC分类号: C01F7/02
CPC分类号: B82Y30/00 , C01F7/02 , C01F7/308 , C01F7/442 , C01P2002/72 , C01P2002/74 , C01P2004/04 , C01P2004/62 , C01P2004/64 , C01P2006/12
摘要: The present invention provides a method for producing an α-alumina powder. The method for producing an α-alumina powder comprises steps of: (1) pulverizing a metal compound having a full width at half maximum (Ho) of a main peak in XRD pattern to obtain a seed crystal having a full width at half maximum (H) of the main peak in XRD pattern, (2) mixing the obtained seed crystal with an aluminum compound, (3) calcining the mixture, and wherein a ratio of H/Ho is 1.06 or more.
摘要翻译: 本发明提供一种生产α-氧化铝粉末的方法。 制造α-氧化铝粉末的方法包括以下步骤:(1)以XRD图案粉碎主峰的半峰全宽(Ho)的金属化合物,得到半峰全宽的晶种( H),(2)将获得的晶种与铝化合物混合,(3)煅烧混合物,其中H / Ho的比例为1.06以上。
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公开(公告)号:US07307033B2
公开(公告)日:2007-12-11
申请号:US10785083
申请日:2004-02-25
申请人: Hajime Maki , Yoshiaki Takeuchi
发明人: Hajime Maki , Yoshiaki Takeuchi
IPC分类号: C01F7/38
CPC分类号: C04B35/6303 , B82Y30/00 , C01F7/30 , C01F7/34 , C01F7/36 , C01F7/442 , C01P2004/03 , C01P2004/04 , C01P2004/52 , C01P2004/61 , C01P2004/62 , C01P2004/64 , C01P2004/90 , C01P2006/12 , C04B35/111 , C04B2235/3217 , C04B2235/5409 , C04B2235/5454 , C04B2235/549
摘要: A method for producing an α-alumina particulate is described. The method for producing an α-alumina particulate comprises steps of (Ia) and (Ib), or a step of (II): (Ia) removing water from a mixture containing water, a seed crystal and a hydrolysate obtained by hydrolysis of an aluminum compound under conditions of a pH of 5 or less and a temperature of 60° C. or less, (Ib) calcining the resulted powder, (II) calcining a mixed powder containing 75-1 wt % of an α-alumina precursor (in terms of Al2O3) and 25-99 wt % of a seed crystal (in terms of oxide of metal component).
摘要翻译: 描述了生产α-氧化铝颗粒的方法。 制备α-氧化铝颗粒的方法包括(Ia)和(Ib)的步骤,或(II)的步骤:(Ia)从含有水,晶种和水解产生的水解产物的混合物中除去水 铝化合物,pH为5以下,温度为60℃以下,(Ib)煅烧所得粉末,(II)煅烧含有75〜1重量%的α-氧化铝前体的混合粉末( 以Al 2 O 3 3)和25-99重量%的晶种(以金属成分的氧化物计)。
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公开(公告)号:US20050008565A1
公开(公告)日:2005-01-13
申请号:US10846693
申请日:2004-05-17
CPC分类号: B82Y30/00 , C01F7/308 , C01P2004/04 , C01P2004/50 , C01P2004/62 , C01P2004/64 , C01P2006/12
摘要: A method for producing α-alumina powder is described. The method comprises the steps of removing water from a compound containing the following (1), (2), (3) and (4), and calcining the results: (1) α-alumina precursor, (2) seed crystal, (3) water, (4) nitrate ion in an amount of from 2.8 to 3.3 mol per mol of aluminum (Al) contained in the α-alumina precursor and the seed crystal.
摘要翻译: 描述了生产α-氧化铝粉末的方法。 该方法包括从含有以下(1),(2),(3)和(4)的化合物中除去水的步骤,并煅烧结果:(1)α-氧化铝前体,(2)晶种,( 3)水,(4)硝酸根离子,其含量为α-氧化铝前体和晶种中每摩尔铝(Al)2.8-3.3摩尔。
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公开(公告)号:US08021451B2
公开(公告)日:2011-09-20
申请号:US11490023
申请日:2006-07-21
申请人: Hajime Maki , Yoshiaki Takeuchi
发明人: Hajime Maki , Yoshiaki Takeuchi
CPC分类号: C01F7/02 , C01F7/023 , C01P2002/74 , C01P2006/10 , C01P2006/80 , C04B35/111 , C04B35/6261 , C04B35/6268 , C04B2235/3206 , C04B2235/5409 , C04B2235/5436 , C04B2235/604 , C04B2235/6562 , C04B2235/72 , C04B2235/77 , C09K3/1463
摘要: The present invention provides a fine α-alumina particle having a degree of α-transformation of not less than 95%, a BET specific surface area of not less than 10 m2/g, a degree of necking of not more than 30%, and a total content of Si, Fe, Cu, Na and Mg of not more than 500 ppm.
摘要翻译: 本发明提供α转变度不小于95%,BET比表面积不小于10m 2 / g,缩颈度不大于30%的细α-氧化铝颗粒,以及 Si,Fe,Cu,Na和Mg的总含量不超过500ppm。
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公开(公告)号:US07858067B2
公开(公告)日:2010-12-28
申请号:US11076836
申请日:2005-03-10
申请人: Hajime Maki , Yoshiaki Takeuchi
发明人: Hajime Maki , Yoshiaki Takeuchi
IPC分类号: C01F7/00
CPC分类号: C09K3/1409 , C01F7/02 , C01F7/308 , C01F7/441 , C01P2002/72 , C01P2002/74 , C01P2004/61 , C01P2004/62 , C01P2006/12 , C01P2006/22
摘要: The present invention provides a method of producing an α-alumina particle. The method of producing an α-alumina particle comprises steps of: (1) heating a mixture containing an amorphous alumina and a pyrolyzable salt at temperature of not less than the temperature at which the pyrolyzable salt is decomposed, and less than the temperature at which the amorphous alumina transforms to α-alumina; and (2) calcining the resultant under a partial pressure of water vapor of about 600 Pa or less.
摘要翻译: 本发明提供一种α-氧化铝颗粒的制造方法。 制造α-氧化铝颗粒的方法包括以下步骤:(1)在不低于可热分解盐分解的温度的温度下加热含有无定形氧化铝和可热解盐的混合物,并且小于 无定形氧化铝转化为α-氧化铝; 和(2)在约600Pa以下的水蒸汽的分压下煅烧所得物。
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公开(公告)号:US07351394B2
公开(公告)日:2008-04-01
申请号:US10784826
申请日:2004-02-24
申请人: Hajime Maki , Yoshiaki Takeuchi
发明人: Hajime Maki , Yoshiaki Takeuchi
IPC分类号: C01F7/02
CPC分类号: C04B35/6303 , B82Y30/00 , C01F7/30 , C01F7/308 , C01F7/442 , C01P2002/72 , C01P2004/03 , C01P2004/04 , C01P2004/61 , C01P2004/62 , C01P2004/64 , C01P2006/12 , C04B35/115 , C04B35/62645 , C04B2235/3217 , C04B2235/3232 , C04B2235/3241 , C04B2235/5409 , C04B2235/5445 , C04B2235/549
摘要: A method for producing an α-alumina powder is described. The method for producing an α-alumina powder comprises a step of calcining an aluminum salt in the presence of a seed crystal at 600-890° C.
摘要翻译: 描述了生产α-氧化铝粉末的方法。 制造α-氧化铝粉末的方法包括在600-890℃的晶种存在下煅烧铝盐的步骤。
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公开(公告)号:US20060073093A1
公开(公告)日:2006-04-06
申请号:US11211700
申请日:2005-08-26
IPC分类号: C01F7/02
CPC分类号: B82Y30/00 , C01F7/30 , C01F7/308 , C01P2004/64 , C01P2006/12
摘要: A method for producing an α-alumina powder is provided. T method for producing an α-alumina powder comprising steps of: (1) pulverizing a metal compound having a full width at half maximum (Ho) of a main peak in XRD pattern to obtain a seed crystal having a full width at half maximum (H) of the main peak in XRD pattern in the presence of pulverizing agent, (2) mixing the obtained seed crystal with an aluminum salt, (3) calcining the mixture, and wherein a ratio of H/Ho is 1.06 or more.
摘要翻译: 提供了一种生产α-氧化铝粉末的方法。 T制造α-氧化铝粉末的方法,包括以下步骤:(1)以XRD图案粉碎主峰的半峰全宽(Ho)的金属化合物,得到半峰全宽的晶种( H),(2)将得到的晶种与铝盐混合,(3)煅烧混合物,其中H / Ho比为1.06以上。
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公开(公告)号:US20070021292A1
公开(公告)日:2007-01-25
申请号:US11490023
申请日:2006-07-21
申请人: Hajime Maki , Yoshiaki Takeuchi
发明人: Hajime Maki , Yoshiaki Takeuchi
CPC分类号: C01F7/02 , C01F7/023 , C01P2002/74 , C01P2006/10 , C01P2006/80 , C04B35/111 , C04B35/6261 , C04B35/6268 , C04B2235/3206 , C04B2235/5409 , C04B2235/5436 , C04B2235/604 , C04B2235/6562 , C04B2235/72 , C04B2235/77 , C09K3/1463
摘要: The present invention provides a fine α-alumina particle having a degree of α-transformation of not less than 95%, a BET specific surface area of not less than 10 m2/g, a degree of necking of not more than 30%, and a total content of Si, Fe, Cu, Na and Mg of not more than 500 ppm.
摘要翻译: 本发明提供α-相变度不小于95%,BET比表面积不小于10m 2 / g的精细α-氧化铝颗粒,缩颈度 不大于30%,Si,Fe,Cu,Na和Mg的总含量不大于500ppm。
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公开(公告)号:US20060210799A1
公开(公告)日:2006-09-21
申请号:US11374968
申请日:2006-03-15
申请人: Hajime Maki , Yoshiaki Takeuchi , Yuzuru Saitou
发明人: Hajime Maki , Yoshiaki Takeuchi , Yuzuru Saitou
CPC分类号: C01F7/02 , B82Y30/00 , C01F7/306 , C01F7/308 , C01F7/36 , C01P2004/04 , C01P2004/52 , C01P2004/64 , C01P2006/12 , C04B35/10 , C04B35/101 , C04B35/111 , C04B2235/3217 , C04B2235/781 , C04B2235/783 , Y10T428/2982 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995 , Y10T428/2996 , Y10T428/2998
摘要: The present invention provides a process for producing fine α-alumina particles, which comprises sintering a mixture of α-alumina precursor particles and seed crystal particles, wherein a center particle diameter of the seed crystal particles is 40 nm or less, and a ratio of the number of coarse particles having a particle diameter greater than 100 nm to the number of the total particles is 1% or less.
摘要翻译: 本发明提供一种生产精细α-氧化铝颗粒的方法,其包括烧结α-氧化铝前体颗粒和晶种颗粒的混合物,其中晶种颗粒的中心粒径为40nm或更小, 粒径大于100nm的粗粒子数与总粒子数之比为1%以下。
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