EP0104002A1
Expired / Lapsed
EP
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Methods of manufacturing metal titanate fine powders
Assignee: Sony Corp
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Filing: 1983-08-24
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Granted: —
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Expires: 2003-08-24
Abstract
Abstract A method of manufacturing metal titanate fine powder which is represented as MTi0 3 where M is Ba, Sr or Ca includes the steps of preparing a hydrolised product of a titanium compound and reacting the hydrolised product with a water soluble metal salt of Ba, Sr or Ca in an aqueous alkaline solution having a pH of not less than 13.
Inventors
- 👤 Satoru Uedaira
- 👤 Hiroshi Yamanoi
- 👤 Hidemasa Tamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 03:37
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C01; C01G; C01G23/00; C01G23/003; C01G23/006; C01P; C01P2002/00; C01P2002/30; C01P2002/34; C01P2002/70; C01P2002/72; C01P2002/76; C01P2002/77; C01P2002/80; C01P2002/88; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/60; C01P2004/61; C01P2004/64
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
101 words
A method of manufacturing metal titanate fine powder which is represented as MTi0 3 where M is Ba, Sr or Ca, comprising the steps of: preparing a hydrolysed product of a titanium compound; and reacting said hydrolysed product with a water soluble metal salt of Ba, Sr or Ca in an aqueous alkaline solution having a pH of not less than 13. 2. A method of manufacturing barium titanate fine powder comprising the steps of: preparing a hydrolysed product of a barium compound; and reacting said hydrolysed product in an aqueous alkaline solution having a pH of not less than 13.
Claim 2
Independent Claim
101 words
A method of manufacturing metal titanate fine powder which is represented as MTi0 3 where M is Ba, Sr or Ca, comprising the steps of: preparing a hydrolysed product of a titanium compound; and reacting said hydrolysed product with a water soluble metal salt of Ba, Sr or Ca in an aqueous alkaline solution having a pH of not less than 13. 2. A method of manufacturing barium titanate fine powder comprising the steps of: preparing a hydrolysed product of a barium compound; and reacting said hydrolysed product in an aqueous alkaline solution having a pH of not less than 13.
Claim 3
Independent Claim
38 words
A method of manufacturing strontium titanate fine powder comprising the steps of: preparing a hydrolysed product of a strontium compound; and reacting said hydrolysed product in an aqueous alkaline solution having a pH of not less than 13.
Claim 4
Independent Claim
38 words
A method of manufacturing strontium titanate fine powder comprising the steps of: preparing a hydrolysed product of a strontium compound; and reacting said hydrolysed product in an aqueous alkaline solution having a pH of not less than 13.
Claim 5
Independent Claim
38 words
A method of manufacturing calcium titanate fine powder comprising the steps of: preparing a hydrolysed product of a calcium compound; and reacting said hydrolysed product in an aqueous alkaline solution having a pH of not less than 13.
Claim 6
Independent Claim
38 words
A method of manufacturing calcium titanate fine powder comprising the steps of: preparing a hydrolysed product of a calcium compound; and reacting said hydrolysed product in an aqueous alkaline solution having a pH of not less than 13.
Claim 7
Dependent Claim
26 words
A method of manufacturing barium titanate fine powder and according to claim 2 wherein said aqueous alkaline solution has a pH of not less than 13.5.
Claim 8
Dependent Claim
23 words
A method of manufacturing barium titanate fine powder and according to claim 2 wherein the molar ratio Ba/Ti is not less than 0.5.
Claim 9
Dependent Claim
26 words
A method of manufacturing barium titanate fine powder and according to claim 2 wherein the molar ratio Ba/Ti is in a range from 0.7 to 5.
Claim 10
Dependent Claim
22 words
A method of manufacturing barium titanate fine powder and according to claim 2 wherein the reaction temperature is not less than 15°C.
Claim 11
Dependent Claim
31 words
A method of manufacturing barium titanate fine powder and according to claim 2 wherein a reaction temperature is in a range from 40°C to the boiling point of said aqueous solution.
Claim 12
Dependent Claim
23 words
A method of manufacturing strontium titanate fine powder and according to claim 3 wherein the molar ratio Sr/Ti is not less than 0.3.
Claim 13
Dependent Claim
26 words
A method of manufacturing strontium titanate fine powder and according to claim 3 wherein the molar ratio Sr/Ti is in a range from 0.5 to 4.
Claim 14
Dependent Claim
22 words
A method of manufacturing strontium titanate fine powder and according to claim 3 wherein the reaction temperature is not less than 20°C.
Claim 15
Dependent Claim
31 words
A method of manufacturing strontium titanate fine powder and according to claim 3 wherein the reaction temperature is in a range from 60°C to the boiling point of said aqueous solution.
Claim 16
Dependent Claim
26 words
A method of manufacturing calcium titanate fine powder and according to claim 4 wherein said aqueous alkaline solution has a pH of not less than 13.2.
Claim 17
Dependent Claim
23 words
A method of manufacturing calcium titanate fine powder and according to claim 4 wherein the molar ratio Ca/Ti is not less than 0.3.
Claim 18
Dependent Claim
26 words
A method of manufacturing calcium titanate fine powder and according to claim 4 wherein the molar ratio Ca/Ti is in a range from 0.6 to 10.
Claim 19
Dependent Claim
22 words
A method of manufacturing calcium titanate fine powder and according to claim 4 wherein the reaction temperature is not less than 70°C.
Claim 20
Dependent Claim
31 words
A method of manufacturing calcium titanate fine powder and according to claim 4, wherein the reaction temperature is in a range from 25°C to the boiling point of said aqueous solution.
Claim 21
Independent Claim
34 words
A method of manufacturing metal titanate fine powder and according to any one of claims 1 to 4 wherein said titanium compound is TiCl 4 , TiOSO 4 or Ti(SO 4 ) 2 .
Claim 22
Dependent Claim
34 words
A method of manufacturing barium titanate fine powder and according to claim 2 wherein said barium compound is Ba(NO 3 ) 2 , Ba(OH) 2 , BaCl 2 or Ba(CH 3 COO) 2 .
Claim 23
Dependent Claim
32 words
A method of manufacturing strontium titanate fine powder and according to claim 3 wherein said strontium compound is Sr(NO 3 ) 2 , Sr(OH) 2 , SrCl 2 , Sr(CH3COO)2 or SrO.
Claim 24
Dependent Claim
35 words
A method of manufacturing calcium titanate fine powder and according to claim 4 wherein said calcium compound is Ca(NO 3 ) 2 , Ca(OH) 2 , CaCl 2 , Ca(CH 3 COO) 2 or CaO.
Claim 25
Dependent Claim
25 words
Barium titanate fine powder, strontium titanate fine powder or calcium titanate fine powder made by a method according to any one of the preceding claims.
References Cited (Backward Citations)
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