›1.independentA barium titanate comprising at least one element selected from the group consisting of Sn, Zr, Ca, Sr, Pb, La, Ce, Mg, Bi, Ni, Al, Si, Zn, B, Nb, W, …+15
A barium titanate comprising at least one element selected from the group consisting of Sn, Zr, Ca, Sr, Pb, La, Ce, Mg, Bi, Ni, Al, Si, Zn, B, Nb, W, Mn, Fe, Cu, and Dy, said at least one element being in an amount of less than about 5 mol %, inclusive of 0 mol %, on the basis of the entirety of BaTiO3,nwherein BET specific surface area x, unit: m2/g, and the ratio y of the c-axis length, unit: nm, of a crystal unit lattice to the a-axis length, unit: nm, of the crystal unit lattice as measured by means of a Rietveld method satisfy one of the following two relations (1) and (2):(1) y≧1.01−(8.8)(10−6)(x3), wherein x is greater than about 0.1 and not more than 9.7(2) y≧1.003 and x>9.7.
›2.↳ 1A barium titanate according to claim 1, which is in the form of powder.d2+2
A barium titanate according to claim 1, which is in the form of powder.
›14.↳ 2A dielectric ceramic comprising a barium titanate as recited in claim 2.d3+1
A dielectric ceramic comprising a barium titanate as recited in claim 2.
›16.↳ 14A capacitor comprising a dielectric ceramic as recited in claim 14.d4
A capacitor comprising a dielectric ceramic as recited in claim 14.
›3.↳ 1A process for producing a barium titanate as recited in claim 1, comprising reacting a titanium oxide sol with a barium compound in an alkaline soluti…d2+9
A process for producing a barium titanate as recited in claim 1, comprising reacting a titanium oxide sol with a barium compound in an alkaline solution containing a basic compound, the process comprising a step of reacting the titanium oxide sol with the barium compound while the concentration of a carbonate group contained in the resultant reaction mixture is maintained at about 500 mass ppm or less as reduced to CO2; a step of removing the basic compound in the form of gas after completion of reaction; and a step of firing the resultant reaction mixture.
›4.↳ 3A process for producing a barium titanate according to claim 3, wherein the titanium oxide sol is produced through hydrolysis of a titanium compound u…d3
A process for producing a barium titanate according to claim 3, wherein the titanium oxide sol is produced through hydrolysis of a titanium compound under acidic conditions.
›5.↳ 3A process for producing a barium titanate according to claim 3, wherein the titanium oxide sol contains brookite-type crystals.d3
A process for producing a barium titanate according to claim 3, wherein the titanium oxide sol contains brookite-type crystals.
›6.↳ 3A process for producing a barium titanate according to claim 3, wherein the basic compound is a substance which can be gasified through evaporation, s…d3+1
A process for producing a barium titanate according to claim 3, wherein the basic compound is a substance which can be gasified through evaporation, sublimation, and/or thermal decomposition at a temperature at which firing is performed or lower and at atmospheric pressure or reduced pressure.
›7.↳ 6A process for producing a barium titanate according to claim 6, wherein the basic compound is an organic base.d4
A process for producing a barium titanate according to claim 6, wherein the basic compound is an organic base.
›8.↳ 3A process for producing a barium titanate according to claim 3, wherein the alkaline solution has a pH of at least about 11.d3
A process for producing a barium titanate according to claim 3, wherein the alkaline solution has a pH of at least about 11.
›9.↳ 3A process for producing a barium titanate according to claim 3, wherein the step of removing the basic compound in the form of gas is carried out at a…d3
A process for producing a barium titanate according to claim 3, wherein the step of removing the basic compound in the form of gas is carried out at a temperature falling within a range of room temperature to a temperature at which firing is performed and at atmospheric pressure or reduced pressure.
›10.↳ 3A process for producing a barium titanate according to claim 3, wherein the firing step includes the step of removing the basic compound in the form o…d3
A process for producing a barium titanate according to claim 3, wherein the firing step includes the step of removing the basic compound in the form of gas.
›11.↳ 3A process for producing a barium titanate according to claim 3, wherein the firing step is carried out at about 300 to about 1,200° C.d3
A process for producing a barium titanate according to claim 3, wherein the firing step is carried out at about 300 to about 1,200° C.
›12.↳ 3A process for producing a barium titanate according to claim 3, wherein the reaction mixture of the titanium oxide sol and the barium compound contain…d3
A process for producing a barium titanate according to claim 3, wherein the reaction mixture of the titanium oxide sol and the barium compound contains a compound of at least one element selected from the group consisting of Sn, Zr, Ca, Sr, Pb, La, Ce, Mg, Bi, Ni, Al, Si, Zn, B, Nb, W, Mn, Fe, Cu, and Dy.
›13.↳ 1A dielectric ceramic comprising a barium titanate as recited in claim 1.d2+1
A dielectric ceramic comprising a barium titanate as recited in claim 1.
›15.↳ 13A capacitor comprising a dielectric ceramic as recited in claim 13.d3
A capacitor comprising a dielectric ceramic as recited in claim 13.
