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US4946810A
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Preparation of ABO3 compounds from mixed metal aromatic coordination complexes
Assignee: Dow Chemical Co
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Filing: 1989-09-11
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Granted: 1990-08-07
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Expires: 2009-09-11
Abstract
Abstract Methods of producing ABO 3 compounds in which A represents a first metal ion and B represents a second metal ion from mixed metal coordination complexes are disclosed. The methods involve reacting compounds serving as a source of the B metal ion with a substituted aromatic compound, in solution, and thereafter reacting the metal coordination complex formed with a compound serving as a source of the A metal, in solution. An example is the reaction of titanium tetraisopropoxide with catechol to form a titanium catecholate coordination complex which is thereafter reacted with barium hydroxide octahydrate to form a pentamethanol barium triscatecholatotitanate mixed metal coordination complex which can be calcined at elevated temperatures to produce the ABO 3 compound, barium titanate (BaTiO 3 ), which is known to have outstanding dielectric, ferroelectric and piezoelectric properties. Portions of the A and/or B ions can be substituted with other metals.
Inventors
- 👤 II Robert H. Heistand
- 👤 Lawrence G. Duquette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:43
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/14; C01B13/18; C01B13/185; C01G; C01G1/00; C01G1/02; C01G23/00; C01G23/003; C01G23/006; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; C01P; C01P2002/00; C01P2002/30; C01P2002/34; C01P2002/70; C01P2002/72; C01P2002/80; C01P2002/88; C01P2004/00; C01P2004/51
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
A substituted mixed metal aromatic coordination complex [A·Q m ][B(L) n (Ar) o ] wherein A represents a first metal ion, B represents a second metal ion, Q represents a solvate, m represents the number of moles of Q, L represents oxygen or --OR wherein R can be hydrogen, saturated or unsaturated acyclic or cyclic alkyl, aryl or alkaryl, n is a number representing the moles of L, Ar represents a residue of a disubstituted aromatic compound, and wherein o represents the number of moles of Ar in the coordination complex with o being greater than zero and wherein a portion of the A ion or B ion, or both, is substituted with one or more additional metal ions.
Claim 2
Dependent Claim
119 words
A substituted mixed metal aromatic coordination complex [A·Q m ][B(L) n (Ar) o ] wherein A represents a first metal ion, B represents a second metal ion, Q represents a solvate, m represents the number of moles of Q, L represents oxygen or --OR wherein R can be hydrogen, saturated or unsaturated acyclic or cyclic alkyl, aryl or alkaryl, n is a number representing the moles of L, Ar represents a residue of a disubstituted aromatic compound, and wherein o represents the number of moles of Ar in the coordination complex with o being greater than zero and wherein a portion of the A ion or B ion, or both, is substituted with one or more additional metal ions.
Claim 3
Dependent Claim
25 words
A substituted mixed metal coordination complex of claim 1 wherein a portion of the A ion is substituted with one or more additional metal ions.
Claim 4
Dependent Claim
25 words
A substituted mixed metal coordination complex of claim 1 wherein a portion of the B ion is substituted with one or more additional metal ions.
Claim 5
Dependent Claim
25 words
A substituted mixed metal coordination complex of claim 2 wherein a portion of the B ion is substituted with one or more additional metal ions.
Claim 6
Dependent Claim
41 words
A mixed metal coordination complex of claim 1 wherein the A metal ion comprises a metal ion selected from Ba, Sr, Ca, Pb, Mg, La, Y, Bi, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Sc.
Claim 7
Dependent Claim
40 words
A mixed metal coordination complex of claim 1 wherein the B metal ion comprises a metal ion selected from Ti, Zr, Sn, Mn, Fe, Zn, Nb, W, Mg, Ta, Cu, Cr, Ru, Rh, Co, Hf, V, Sc, Mo and Ir.
Claim 8
Dependent Claim
56 words
A mixed metal coordination complex of claim 5 wherein the B metal ion comprises a metal ion selected from Ti, Zr, Sn, Mn, Fe, Zn, Nb, W, Mg, Ta, Cu, Cr, Ru, Rh, Co, Hf, V, Mo and Ir, and wherein the B metal ion can be Sc where the A metal ion is not Sc.
Claim 9
Dependent Claim
2 words
Solvated oxobiscatecholate.
Claim 10
Dependent Claim
2 words
Solvated oxobiscatecholate.
Claim 11
Dependent Claim
2 words
Solvated oxobiscatecholate.
Claim 12
Dependent Claim
2 words
Solvated oxobiscatecholate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |