US4520004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing metal titanate fine powder
Assignee: Sony Corp
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Filing: 1983-08-19
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Granted: 1985-05-28
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Expires: 2003-08-19
Abstract
Abstract A method of manufacturing metal titanate fine powder which is represented as MTiO 3 wherein M is one of Ba, Sr and Ca is disclosed which includes the steps of preparing hydrolyzed compound of titanium compound and reacting the hydrolyzed compound of titanium compound with water soluble metal salt of one of Ba, Sr and Ca in an aqueous alkaline solution having pH not less than 13.
Inventors
- 👤 Satoru Uedaira
- 👤 Hiroshi Yamanoi
- 👤 Hidemasa Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:36
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: 27
Claim 1
Independent Claim
95 words
A method for manufacturing a metal titanate fine powder having the formula MTiO 3 wherein M is Ba, Sr, or Ca comprising the steps of: preparing a hydrolysis product of an inorganic titanium compound TiO 2 .xH 2 O by dissolving said inorganic titanium compound in a neutral or alkaline aqueous solution, reacting said hydrolysis product with a water soluble salt of Ba, Sr, or Ca in an aqueous alkaline solution having a pH not less than 13 to thereby obtain said metal titanate fine powder, and filtering said fine powder from the remaining solution.
Claim 2
Independent Claim
95 words
A method for manufacturing a metal titanate fine powder having the formula MTiO 3 wherein M is Ba, Sr, or Ca comprising the steps of: preparing a hydrolysis product of an inorganic titanium compound TiO 2 .xH 2 O by dissolving said inorganic titanium compound in a neutral or alkaline aqueous solution, reacting said hydrolysis product with a water soluble salt of Ba, Sr, or Ca in an aqueous alkaline solution having a pH not less than 13 to thereby obtain said metal titanate fine powder, and filtering said fine powder from the remaining solution.
Claim 3
Dependent Claim
30 words
A method of manufacturing metal titanate fine powder according to claim 1, wherein said titanium compound is selected from TiCl 4 , TiOSO 4 and Ti(SO 4 ) 2 .
Claim 4
Independent Claim
84 words
A method for manufacturing a barium titanate fine powder having the formula BaTiO 3 comprising the steps of: preparing hydrolyzed product of an inorganic titanium compound TiO 2 .xH 2 O by dissolving said inorganic titanium compound in a neutral or alkaline aqueous solution, reacting said hydrolysis product with a water soluble salt of Ba in an aqueous alkaline solution having a pH not less than 13 to thereby obtain said barium titanate fine powder, and filtering said fine powder from the remaining solution.
Claim 5
Independent Claim
84 words
A method for manufacturing a barium titanate fine powder having the formula BaTiO 3 comprising the steps of: preparing hydrolyzed product of an inorganic titanium compound TiO 2 .xH 2 O by dissolving said inorganic titanium compound in a neutral or alkaline aqueous solution, reacting said hydrolysis product with a water soluble salt of Ba in an aqueous alkaline solution having a pH not less than 13 to thereby obtain said barium titanate fine powder, and filtering said fine powder from the remaining solution.
Claim 6
Dependent Claim
24 words
A method of manufacturing barium titanate fine powder according to claim 3, wherein said aqueous alkaline solution has pH value not less than 13.5.
Claim 7
Dependent Claim
25 words
A method of manufacturing barium titanate fine powder according to claim 3, wherein a molar ratio, Ba/Ti is selected to be not less than 0.5.
Claim 8
Dependent Claim
28 words
A method of manufacturing barium titanate fine powder according to claim 3, wherein said molar ratio, Ba/Ti is selected to be in a range from 0.7 to 5.
Claim 9
Dependent Claim
25 words
A method of manufacturing barium titanate fine powder according to claim 3, wherein a reacting temperature is selected to be not less than 15° C.
Claim 10
Dependent Claim
32 words
A method of manufacturing barium titanate fine powder according to claim 3, wherein said reacting temperature is selected in a range from 40° C. to a boiling point of the aqueous solution.
Claim 11
Dependent Claim
37 words
A method of manufacturing barium titanate fine powder according to claim 3, wherein a water soluble barium salt is selected from Ba(NO 3 ) 2 , Ba(OH) 2 , BaCl 2 and Ba(CH 3 COO 2 .
Claim 12
Independent Claim
85 words
A method for manufacturing a strontium titanate fine powder having the formula SrTiO 3 comprising the steps of: preparing a hydrolysis product of an inorganic titanium compound TiO 2 .xH 2 O by dissolving said inorganic titanium compound in a neutral or alkaline aqueous solution. reacting said hydrolysis product with a water soluble salt of Sr in an aqueous alkaline solution having a pH not less than 13 to thereby obtain said strontium titanate fine powder, and filtering said fine powder from the remaining solution.
Claim 13
Independent Claim
85 words
A method for manufacturing a strontium titanate fine powder having the formula SrTiO 3 comprising the steps of: preparing a hydrolysis product of an inorganic titanium compound TiO 2 .xH 2 O by dissolving said inorganic titanium compound in a neutral or alkaline aqueous solution. reacting said hydrolysis product with a water soluble salt of Sr in an aqueous alkaline solution having a pH not less than 13 to thereby obtain said strontium titanate fine powder, and filtering said fine powder from the remaining solution.
Claim 14
Dependent Claim
25 words
A method of manufacturing strontium titanate fine powder according to claim 10, wherein a molar ratio, Sr/Ti is selected to be not less than 0.3.
Claim 15
Dependent Claim
28 words
A method of manufacturing strontium titanate fine powder according to claim 10, wherein a molar ratio, Sr/Ti is selected to be in a range from 0.5 to 4.
Claim 16
Dependent Claim
25 words
A method of manufacturing strontium titanate fine powder according to claim 10, wherein a reacting temperature is selected to be not less than 20° C.
Claim 17
Independent Claim
33 words
A method of manufacturing strontium titanate fine powder according to 10, wherein a reaction temperature is selected to be in a range from 60° C. to a boiling point of the aqueous solution.
Claim 18
Independent Claim
33 words
A method of manufacturing strontium titanate fine powder according to 10, wherein a reaction temperature is selected to be in a range from 60° C. to a boiling point of the aqueous solution.
Claim 19
Dependent Claim
38 words
A method of manufacturing strontium titanate fine powder according to claim 10, wherein a water soluble strontium salt is selectd from Sr(NO 3 ) 2 , Sr(OH) 2 , SrCl 2 , Sr(CH 3 COO) 2 and SrO.
Claim 20
Independent Claim
85 words
A method for manufacturing a calcium titanate fine powder having the formula CaTiO 3 comprising the steps of: preparing a hydrolysis product of an inorganic titanium compound TiO 2 .xH 2 O by dissolving said inorganic titanium compound in a neutral or alkaline aqueous solution. reacting said hydrolysis product with a water soluble salt of Ca in an aqueous alkaline solution having a pH not less than 13 to thereby obtain said calcium titanate fine powder, and filtering said fine powder from the remaining solution.
Claim 21
Independent Claim
85 words
A method for manufacturing a calcium titanate fine powder having the formula CaTiO 3 comprising the steps of: preparing a hydrolysis product of an inorganic titanium compound TiO 2 .xH 2 O by dissolving said inorganic titanium compound in a neutral or alkaline aqueous solution. reacting said hydrolysis product with a water soluble salt of Ca in an aqueous alkaline solution having a pH not less than 13 to thereby obtain said calcium titanate fine powder, and filtering said fine powder from the remaining solution.
Claim 22
Dependent Claim
24 words
A method of manufacturing calcium titanate fine powder according to claim 16, wherein said aqueous alkaline solution has pH value not less than 13.2.
Claim 23
Dependent Claim
25 words
A method of manufacturing calcium titanate fine powder according to claim 16, wherein a molar ratio, Ca/Ti is selected to be not less than 0.3.
Claim 24
Dependent Claim
28 words
A method of manufacturing calcium titanate fine powder according to claim 16, wherein a molar ratio, Ca/Ti is selected to be in a range from 0.6 to 10.
Claim 25
Dependent Claim
25 words
A method of manufacturing calcium titanate fine powder according to claim 16, wherein a reaction temperature is selected to be not less than 70° C.
Claim 26
Dependent Claim
34 words
A method of manufacturing calcium titanate fine powder according to claim 16, wherein a reaction temperature is selected to be in a range from 25° C. to a boiling point of the aqueous solution.
Claim 27
Dependent Claim
38 words
A method of manufacturing calcium titanate fine powder according to claim 16, wherein a water soluble calcium salt is selected from Ca(NO 3 ) 2 , Ca(OH) 2 , CaCl 2 , Ca(CH 3 COO) 2 and CaO.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |