Method for producing two-component or three-component lead zirconate-titanate

Claim 1

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a second aqueous solution which contains titanium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first and second aqueous solutions, thereby producing a mixture; hydrolyzing the mixture, thereby producing a sol; drying the sol; and calcining the sol at 700° to 1300° C., thereby forming a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and the other components, lead, niobium, and yttrium, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1,200° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 2

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a second aqueous solution which contains titanium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first and second aqueous solutions, thereby producing a mixture; hydrolyzing the mixture, thereby producing a sol; drying the sol; and calcining the sol at 700° to 1300° C., thereby forming a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and the other components, lead, niobium, and yttrium, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1,200° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 3

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a second aqueous solution which contains titanium in an amount corresponding to part of a total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first and second aqueous solutions, thereby forming a mixture; adding the mixture to a coprecipitant solution thereby forming a coprecipitate; and calcining the coprecipitate to 700° to 1300° C., thereby producing a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and the other components, lead, niobium, and yttrium, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 4

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a second aqueous solution which contains titanium in an amount corresponding to part of a total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first and second aqueous solutions, thereby forming a mixture; adding the mixture to a coprecipitant solution thereby forming a coprecipitate; and calcining the coprecipitate to 700° to 1300° C., thereby producing a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and the other components, lead, niobium, and yttrium, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 5

A method for producing a powdered Pb(Yphd 1/2Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 PbZrO 3 compound, a second aqueous solution which contains titanium in an amount corresponding to part of a total amount necessary to produce said powdered Pb(Y 1/2 Nb1/2)O 3 -PbTiO 3 -PbZrO 3 compound, and a third aqueous solution which contains niobium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first, second and third aqueous solutions, thereby forming a mixture; hydrolyzing the mixture, thereby forming a sol; drying the sol; and calcining the sol at 700° to 1300° C., thereby producing a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and the other components, lead and yttrium, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 6

A method for producing a powdered Pb(Yphd 1/2Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 PbZrO 3 compound, a second aqueous solution which contains titanium in an amount corresponding to part of a total amount necessary to produce said powdered Pb(Y 1/2 Nb1/2)O 3 -PbTiO 3 -PbZrO 3 compound, and a third aqueous solution which contains niobium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first, second and third aqueous solutions, thereby forming a mixture; hydrolyzing the mixture, thereby forming a sol; drying the sol; and calcining the sol at 700° to 1300° C., thereby producing a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and the other components, lead and yttrium, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 7

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 PbTiO 3 -PbZrO 3 compound, a second aqueous solution which contains titanium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a third aqueous solution which contains yttrium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a fourth aqueous solution which contains niobium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a third aqueous solution which contains yttrium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a fourth aqueous solution which contains niobium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first and second aqueous solutions, thereby forming a first mixture; hydrolyzing the first mixture, thereby forming a first sol; drying the first sol; calcining the first sol at 700° to 1300° C., thereby producing a first modified powder; mixing the third and fourth aqueous solutions, thereby forming a second mixture; hydrolyzing the second mixture, thereby forming a second sol; drying the second sol; and calcining the second sol at 700° to 1300° C., thereby producing a second modified powder; and a second step of: mixing the first and second modified powder obtained through the first step with a mixture which contains the remaining titanium and niobium and the other component, lead, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 178 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 8

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 PbTiO 3 -PbZrO 3 compound, a second aqueous solution which contains titanium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a third aqueous solution which contains yttrium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a fourth aqueous solution which contains niobium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a third aqueous solution which contains yttrium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a fourth aqueous solution which contains niobium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first and second aqueous solutions, thereby forming a first mixture; hydrolyzing the first mixture, thereby forming a first sol; drying the first sol; calcining the first sol at 700° to 1300° C., thereby producing a first modified powder; mixing the third and fourth aqueous solutions, thereby forming a second mixture; hydrolyzing the second mixture, thereby forming a second sol; drying the second sol; and calcining the second sol at 700° to 1300° C., thereby producing a second modified powder; and a second step of: mixing the first and second modified powder obtained through the first step with a mixture which contains the remaining titanium and niobium and the other component, lead, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 178 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 9

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PhZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a second aqueous solution which contains titanium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a third aqueous solution which contains niobium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first to third aqueous solutions, thereby forming a mixture; adding the mixture to a coprecipitant solution, thereby forming a coprecipitate; and calcining the coprecipitate at 700° to 1300° C., thereby producing a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and the other components, lead and yttrium, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 10

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PhZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a second aqueous solution which contains titanium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a third aqueous solution which contains niobium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first to third aqueous solutions, thereby forming a mixture; adding the mixture to a coprecipitant solution, thereby forming a coprecipitate; and calcining the coprecipitate at 700° to 1300° C., thereby producing a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and the other components, lead and yttrium, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 11

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a second aqueous solution which contains titanium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(T 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a third aqueous solution which contains yttrium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a fourth aqueous solution which contains niobium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first to fourth aqueous solutions, thereby forming a mixture; adding the mixture to a coprecipitant solution, thereby forming a coprecipitate; and calcining the coprecipitate at 700° to 1300° C., thereby producing a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and niobium and the other component, lead, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.

Claim 12

A method for producing a powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, said method comprising: a first step of: preparing a first aqueous solution which contains zirconium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a second aqueous solution which contains titanium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(T 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, a third aqueous solution which contains yttrium in an amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and a fourth aqueous solution which contains niobium in an amount corresponding to part of the total amount necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound; mixing the first to fourth aqueous solutions, thereby forming a mixture; adding the mixture to a coprecipitant solution, thereby forming a coprecipitate; and calcining the coprecipitate at 700° to 1300° C., thereby producing a modified powder; and a second step of: mixing the modified powder obtained through the first step with a mixture which contains the remaining titanium and niobium and the other component, lead, necessary to produce said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound, and calcining the resultant mixture at 500° to 1300° C., thereby producing said powdered Pb(Y 1/2 Nb 1/2 )O 3 -PbTiO 3 -PbZrO 3 compound.