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Patent Agency Ranking
公开(公告)号：KR1019960004385B1
公开(公告)日：1996-04-02
申请号：KR1019930008970
申请日：1993-05-24
Applicant: 한국과학기술연구원
IPC: C04B35/10
Abstract: The method for producing the sintered alpha alumina using a precursor comprises: mixing an delta alumina with a water containing alpha alumina powder; milling the mixture to obtain a slip of high viscosity; adding alpha alumina seed and alumina sol to it; and drying and sintering it.
Abstract translation: 使用前体制备烧结的α氧化铝的方法包括：将δ氧化铝与含有α氧化铝粉末的水混合; 研磨混合物以获得高粘度的滑移; 向其中加入α氧化铝种子和氧化铝溶胶; 并干燥并烧结。
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公开(公告)号：KR100437482B1
公开(公告)日：2004-06-25
申请号：KR1020010075959
申请日：2001-12-03
Applicant: 한국과학기술연구원
IPC: C01G1/02
Abstract: PURPOSE: A method for preparing a composite metal oxide powder is provided, to enable a calcination process for the formation of phase to be omitted or the temperature to be lowered largely by improving the easiness of solid solution reaction in heat treatment. CONSTITUTION: The method comprises the steps of mixing at least one metal oxide powder with a low reactivity in the quantity smaller than the stoichiometrically necessary amount in a solvent to prepare slurry; adding a metal salt or a metal alkoxide to the slurry in the quantity satisfying the stoichiometrically necessary amount; adding an excess amount of water to hydrolyze the metal salt or the metal alkoxide; and removing the solvent, and drying and heating the remaining one. Preferably the amount of the metal salt or the metal alkoxide added to the slurry is 5-10 wt% of the stoichiometrically necessary amount. Preferably the metal salt is a metal nitrate salt; and the metal alkoxide is propoxide, isopropoxide, isobutoxide or n-butoxide of metal. Preferably the composite metal oxide powder is Pb(Zr(1-w), Tiw)O3 (0
Abstract translation: 目的：提供一种制备复合金属氧化物粉末的方法，通过改善热处理中固溶反应的容易性，可以省去形成相的煅烧过程或大大降低温度。 组成：该方法包括以下步骤：在溶剂中混合至少一种具有小于化学计量必要量的低反应性的金属氧化物粉末以制备浆料; 将金属盐或金属醇盐以满足化学计量必需量的量加入浆液中; 加入过量的水以水解金属盐或金属醇盐; 并除去溶剂，并干燥和加热剩余的一个。 优选地，加入到浆料中的金属盐或金属醇盐的量为化学计量必需量的5-10重量％。 优选金属盐是金属硝酸盐; 金属醇盐为金属的丙醇盐，异丙醇盐，异丁醇盐或正丁醇盐。 （Zr（1-w），Tiw）O 3（0
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公开(公告)号：KR1020030046549A
公开(公告)日：2003-06-18
申请号：KR1020010075959
申请日：2001-12-03
Applicant: 한국과학기술연구원
IPC: C01G1/02
CPC classification number: C01G1/02 , C01P2002/34
Abstract: PURPOSE: A method for preparing a composite metal oxide powder is provided, to enable a calcination process for the formation of phase to be omitted or the temperature to be lowered largely by improving the easiness of solid solution reaction in heat treatment. CONSTITUTION: The method comprises the steps of mixing at least one metal oxide powder with a low reactivity in the quantity smaller than the stoichiometrically necessary amount in a solvent to prepare slurry; adding a metal salt or a metal alkoxide to the slurry in the quantity satisfying the stoichiometrically necessary amount; adding an excess amount of water to hydrolyze the metal salt or the metal alkoxide; and removing the solvent, and drying and heating the remaining one. Preferably the amount of the metal salt or the metal alkoxide added to the slurry is 5-10 wt% of the stoichiometrically necessary amount. Preferably the metal salt is a metal nitrate salt; and the metal alkoxide is propoxide, isopropoxide, isobutoxide or n-butoxide of metal. Preferably the composite metal oxide powder is Pb(Zr(1-w), Tiw)O3 (0
Abstract translation: 目的：提供一种复合金属氧化物粉末的制备方法，通过提高热处理中的固溶反应的容易性，可以进行能够省略相的形成的煅烧工序或降低温度的方法。 方案：该方法包括以下步骤：在溶剂中混合少于化学计量所需量的低反应性的至少一种金属氧化物粉末以制备浆料; 以满足化学计量要求量的量向浆料中加入金属盐或金属醇盐; 加入过量的水以水解金属盐或金属醇盐; 除去溶剂，干燥并加热剩余的溶剂。 优选地，添加到浆料中的金属盐或金属醇盐的量为化学计量所需量的5-10重量％。 优选地，金属盐是金属硝酸盐; 金属醇盐是金属的丙氧化物，异丙醇盐，异丁醇盐或正丁醇盐。 优选复合金属氧化物粉末是Pb（Zr（1-w），Tiw）O 3（0
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