Abstract: A ceramic having a plurality of crystal grains that contain lead, lithium, and boron, are arranged in a planar direction, and have a mutually same crystal orientation with respect to the thickness direction.

Abstract: A method for producing crystalline particles including a mixing step of producing a mixed material containing a lead-containing material and an additional material containing lithium and boron and a first firing step of firing the mixed material at a predetermined firing temperature to form polyhedral crystalline particles. The crystalline particles are used to produce a crystallographically oriented ceramic by preparing a template layer having uniform crystal orientation in a predetermined direction by fixing the crystalline particles on a substrate, forming a shaped body including a matrix layer arranged on the template layer, the matrix layer being composed of a mixed material that contains a lead-containing material and an additional material containing lithium and boron, and firing the shaped body.

Abstract: A method for producing a crystallographically oriented ceramic including a preparation step of preparing a template layer having uniform crystal orientation in a predetermined direction, a formation step of forming a shaped body including a matrix layer arranged on the template layer, the matrix layer being composed of a mixed material that contains a lead-containing material and an additional material containing lithium and boron, and a firing step of firing the shaped body formed in the formation step at a predetermined firing temperature. Furthermore, after the firing step, a post-annealing step of heating the shaped body to remove lithium and boron may be included.

Abstract: A crystal oriented ceramic composite body is provided, including a substrate that has a first surface and a second surface, and a {100} oriented ceramic film that is disposed to face the first surface. The {100} oriented ceramic film includes a first sectional surface. The first sectional surface is perpendicular to the first surface, and a 90 degree domain includes a domain wall within a range of ±20 degrees of a normal to the first surface and occupies a surface area of at least ? of the first sectional surface.

Abstract: A ceramic having a plurality of crystal grains that contain lithium and boron, the crystal grains are arranged in a planar direction, and the crystal grains have a mutually same crystal orientation with respect to the thickness direction, the ceramic having a portion defined by parallel sectional surfaces in a thickness direction, the portion being equally divided into a plurality of segments by parallel sectional surfaces in a planar direction, and when the amount of boron in each segment is compared, the thickness of a low boron concentration region, the low boron concentration region being a collection of segments displaying a boron amount of less than or equal to an average value for the maximum value and minimum value of the boron amount, is greater than or equal to 20% to less than or equal to 90% of the overall thickness of the portion.

Abstract: A crystal oriented ceramic composite body including a substrate that has a first surface and a second surface, and a {100} oriented ceramic film that is disposed to face the first surface. The {100} oriented ceramic film includes a first sectional surface. The first sectional surface is perpendicular to the first surface, and a 90 degree domain includes a domain wall within a range of ±20 degrees of a normal to the first surface and occupies a surface area of at least ? of the first sectional surface.

Abstract: A ceramic having a plurality of crystal grains that contain lithium and boron, the crystal grains are arranged in a planar direction, and the crystal grains have a mutually same crystal orientation with respect to the thickness direction, the ceramic having a portion defined by parallel sectional surfaces in a thickness direction, the portion being equally divided into a plurality of segments by parallel sectional surfaces in a planar direction, and when the amount of boron in each segment is compared, the thickness of a low boron concentration region, the low boron concentration region being a collection of segments displaying a boron amount of less than or equal to an average value for the maximum value and minimum value of the boron amount, is greater than or equal to 20% to less than or equal to 90% of the overall thickness of the portion.

Abstract: A ceramic having a plurality of crystal grains that contain lead, lithium, and boron, are arranged in a planar direction, and have a mutually same crystal orientation with respect to the thickness direction.

Abstract: A method for producing a crystallographically oriented ceramic according to the present invention includes a preparation step of preparing a template layer having uniform crystal orientation in a predetermined direction, a formation step of forming a shaped body including a matrix layer arranged on the template layer, the matrix layer being composed of a mixed material that contains a lead-containing material and an additional material containing lithium and boron, and a firing step of firing the shaped body formed in the formation step at a predetermined firing temperature. Furthermore, after the firing step, a post-annealing step of heating the shaped body to remove lithium and boron may be included.

Abstract: A method for producing crystalline particles according to the present invention includes a mixing step of producing a mixed material containing a lead-containing material and an additional material containing lithium and boron and a first firing step of firing the mixed material at a predetermined firing temperature to form polyhedral crystalline particles. It is possible to produce a crystallographically oriented ceramic by preparing a template layer having uniform crystal orientation in a predetermined direction by fixing the crystalline particles on a substrate, forming a shaped body including a matrix layer arranged on the template layer, the matrix layer being composed of a mixed material that contains a lead-containing material and an additional material containing lithium and boron, and firing the shaped body.