Invention Grant
- Patent Title: Water-based rare earth metal compound sol, manufacturing method thereof, and method for manufacturing ceramic powder using the same
- Patent Title (中): 水性稀土金属化合物溶胶及其制造方法以及使用其制造陶瓷粉末的方法
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Application No.: US12559738Application Date: 2009-09-15
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Publication No.: US08592491B2Publication Date: 2013-11-26
- Inventor: Takashi Hasegawa , Yasunari Nakamura , Kazunari Okada
- Applicant: Takashi Hasegawa , Yasunari Nakamura , Kazunari Okada
- Applicant Address: JP Nagaokakyo-Shi, Kyoto-fu
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Nagaokakyo-Shi, Kyoto-fu
- Agency: Dickstein Shapiro LLP
- Priority: JP2003-351173 20031009
- Main IPC: B01F3/12
- IPC: B01F3/12 ; C01F17/00 ; C04B35/468 ; C04B35/50 ; B01J23/10
Abstract:
A particulate subcomponent for a barium titanate dielectric is obtained from a sol in which a rare earth metal compound is dispersed in water. The rare earth metal compound includes a carboxylic acid having at least three carbonyl groups and at least one rare earth metal which can be Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu so that the molar ratio (carbonyl group/rare earth metal) is in the range of 1.2 to 3. A method of making the sol and a method of using the sol to make a ceramic powder is described.
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