Abstract: A coil component includes an element body formed by laminating a plurality of insulator layers, and a pillar part disposed in the element body and extending in a lamination direction of the plurality of insulator layers. The pillar part has a plurality of pillar members laminated in the lamination direction. Between the two pillar members in the lamination direction, a defining part that defines a contact surface between the two pillar members is provided. The defining part is formed of a material different from a material of the pillar part, and is disposed at edges of the two pillar members when viewed from the lamination direction.

Abstract: A piezoelectric composition according to the present invention comprising: a carbon, and a main component composed of an alkali metal niobate based compound. The amount of carbon contained is 350 to 700 ppm by weight.

Abstract: Provided is a piezoelectric element according to the invention including a stacked body in which a piezoelectric layer and an internal electrode layer are stacked. In addition, the internal electrode layer contains at least one kind of element selected from palladium, nickel, platinum, gold, and silver, and copper, and the content of copper contained in the internal electrode layer is 1 to 50 at % in terms of a copper element.

Abstract: A piezoelectric composition including manganese and a complex oxide having a perovskite structure represented by a general formula ABO3, wherein an A site element in the ABO3 is potassium or potassium and sodium, a B site element in the ABO3 is niobium, a concentration distribution of the manganese has a variation, and the variation shows a CV value of 35% or more and 440% or less.

Abstract: A piezoelectric composition containing: a complex oxide having a perovskite structure represented by a general formula of ABO3; copper; and one or more elements selected from the group consisting of chromium, nickel and zinc, in which in ABO3, an A-site element is potassium and a B-site element is niobium, or niobium and tantalum, with respect to 1 mol of the complex oxide, a content ratio of the copper is ? mol % in terms of CuO, a content ratio of one or more elements selected from the group consisting of chromium, nickel and zinc is ? mol % in terms of CrO3/2, NiO, ZnO, ? satisfies a relationship of 0.2???2.5, and ? satisfies a relationship of 0.2???2.0.

Abstract: A piezoelectric composition including copper and a complex oxide having a perovskite structure represented by a general formula ABO3, in which an A site element in the ABO3 is potassium or potassium and sodium, a B site element in the ABO3 is niobium or niobium and tantalum, the copper is included in n mol % in terms of a copper element with respect to 1 mol of the complex oxide, and n satisfies 0.100?n?1.000.

Abstract: A piezoelectric composition having a complex oxide including potassium and niobium, in which the complex oxide has a first phase represented by a compositional formula KNbO3, and one or two phases selected from a second phase represented by a compositional formula K4Nb6O17 and a third phase represented by a compositional formula KNb3O8.

Abstract: Provided is a piezoelectric element according to the invention including a stacked body in which a piezoelectric layer and an internal electrode layer are stacked. In addition, the internal electrode layer contains at least one kind of element selected from palladium, nickel, platinum, gold, and silver, and copper, and the content of copper contained in the internal electrode layer is 1 to 50 at % in terms of a copper element.

Abstract: A piezoelectric composition according to the present invention comprising: a carbon, and a main component composed of an alkali metal niobate based compound. The amount of carbon contained is 350 to 700 ppm by weight.

Abstract: A piezoelectric composition including copper, germanium and a complex oxide represented by a compositional formula KmNbO3 and having a perovskite structure, in which m in the compositional formula satisfies 0.970?m?0.999, and with respect to 1 mol of the complex oxide, x mol % of copper in terms of a copper element and y mol % of germanium in terms of a germanium element are contained, wherein x satisfies 0.100?x?1.000 and y satisfies 0.000<y?1.500.

Abstract: A piezoelectric composition containing: a complex oxide having a perovskite structure represented by a general formula of ABO3; copper; and one or more elements selected from the group consisting of chromium, nickel and zinc, in which in ABO3, an A-site element is potassium and a B-site element is niobium, or niobium and tantalum, with respect to 1 mol of the complex oxide, a content ratio of the copper is ? mol % in terms of CuO, a content ratio of one or more elements selected from the group consisting of chromium, nickel and zinc is ? mol % in terms of CrO3/2, NiO, ZnO, ? satisfies a relationship of 0.2???2.5, and ? satisfies a relationship of 0.2???2.0.

Abstract: A piezoelectric composition having a complex oxide including potassium and niobium, in which the complex oxide has a first phase represented by a compositional formula KNbO3, and one or two phases selected from a second phase represented by a compositional formula K4Nb6O17 and a third phase represented by a compositional formula KNb3O8.

Abstract: A piezoelectric composition including copper and a complex oxide having a perovskite structure represented by a general formula ABO3, in which an A site element in the ABO3 is potassium or potassium and sodium, a B site element in the ABO3 is niobium or niobium and tantalum, the copper is included in n mol % in terms of a copper element with respect to 1 mol of the complex oxide, and n satisfies 0.100?n?1.000.

Abstract: A piezoelectric composition including manganese and a complex oxide having a perovskite structure represented by a general formula ABO3, wherein an A site element in the ABO3 is potassium or potassium and sodium, a B site element in the ABO3 is niobium, a concentration distribution of the manganese has a variation, and the variation shows a CV value of 35% or more and 440% or less.

Abstract: A piezoelectric composition including copper, germanium and a complex oxide represented by a compositional formula KmNbO3 and having a perovskite structure, in which m in the compositional formula satisfies 0.970? m?0.999, and with respect to 1 mol of the complex oxide, x mol % of copper in terms of a copper element and y mol % of germanium in terms of a germanium element are contained, wherein x satisfies 0.100 ?x?1.000 and y satisfies 0.000<y?1.500.

Abstract: A piezoelectric film containing (K,Na)NbO3 as the main component, wherein, when a surface of the piezoelectric film was observed in a field view within a specified range, a plurality of first crystals and a plurality of second crystals are arranged in the surface of the piezoelectric film, wherein, the first crystal has a slender shape orientating toward the first orientation along the surface, and the second crystal has a slender shape orientating toward the second orientation which crosses with the first orientation along the surface.

Abstract: A piezoelectric element exhibiting a small leakage current density and high reliability as compared with a KNN thin film piezoelectric element in the related art is provided. The piezoelectric element is characterized by including a lower electrode, a piezoelectric layer primarily made from potassium-sodium niobate, which is a perovskite type compound represented by a general formula ABO3, and an upper electrode, wherein the piezoelectric layer is present between the lower electrode and the upper electrode, and the piezoelectric layer has the value determined by dividing the maximum value of intensity of a diffraction peak, where the angle of 2? is within the range of 21.1°?2??23.4° in the X-ray diffraction pattern (2?/?), by the intensity of a diffraction peak, where 2? is within the range of 30.1°?2??33.3°, of 0.04 or less.

Abstract: A piezoelectric film containing (K,Na)NbO3 as the main component, wherein, when a surface of the piezoelectric film was observed in a field view within a specified range, a plurality of first crystals and a plurality of second crystals are arranged in the surface of the piezoelectric film, wherein, the first crystal has a slender shape orientating toward the first orientation along the surface, and the second crystal has a slender shape orientating toward the second orientation which crosses with the first orientation along the surface.

Abstract: A piezoelectric device is provided with a piezoelectric element including a piezoelectric layer exhibiting a polarizability ? smaller than 1×10?9 (C/(V·m)) in the case where an electric field is applied until polarization is saturated and a circuit having a means to set a minimum value of a drive electric field to become larger than a positive coercive electric field of the above-described piezoelectric layer and a means to set a maximum value of the above-described drive electric field to become smaller than (Pm?(maximum value of polarization)?Pr?(quasi-remanent polarization))/(1×10?9) and, therefore, an object is to drive the piezoelectric element in an electric field range in which maximum piezoelectric characteristics are obtained, improve the characteristics of the piezoelectric device, and enhance the reliability.

Abstract: A piezoelectric element exhibiting a small leakage current density and high reliability as compared with a KNN thin film piezoelectric element in the related art is provided. The piezoelectric element is characterized by including a lower electrode, a piezoelectric layer primarily made from potassium-sodium niobate, which is a perovskite type compound represented by a general formula ABO3, and an upper electrode, wherein the piezoelectric layer is present between the lower electrode and the upper electrode, and the piezoelectric layer has the value determined by dividing the maximum value of intensity of a diffraction peak, where the angle of 2? is within the range of 21.1°?2??23.4° in the X-ray diffraction pattern (2?/?), by the intensity of a diffraction peak, where 2? is within the range of 30.1°?2??33.3°, of 0.04 or less.