Invention Grant
- Patent Title: Method for producing an α-alumina power
- Patent Title (中): α-氧化铝粉末的制造方法
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Application No.: US11211700Application Date: 2005-08-26
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Publication No.: US07691362B2Publication Date: 2010-04-06
- Inventor: Hajime Maki , Yoshiaki Takeuchi , Kazuhisa Kajihara
- Applicant: Hajime Maki , Yoshiaki Takeuchi , Kazuhisa Kajihara
- Applicant Address: JP Tokyo
- Assignee: Sumitomo Chemical Company, Limited
- Current Assignee: Sumitomo Chemical Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2004-256676 20040903; JP2005-000527 20050105
- Main IPC: C01F7/02
- IPC: C01F7/02
Abstract:
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.
Public/Granted literature
- US20060073093A1 Method for producing an alpha-alumina powder Public/Granted day:2006-04-06
Information query
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