摘要:
A piezoelectric ceramic 10 composed mainly of a three-component solid solution represented by the following general formula (1), wherein x, y and z in general formula (1) satisfy the following formulas (2), (3), (4) and (5). x(Bi1/2Na1/2)TiO3−y(Bi1/2Li1/2)TiO3−z(Bi1/2K1/2)TiO3 (1) 0.80≦x≦0.96 (2) 0.02≦y≦0.08 (3) 0.01≦z≦0.15 (4) x+y+z=1 (5)
摘要:
A piezoelectric ceramic composition having a large piezoelectric constant (d) and as well having a large Qm value is to be provided. The piezoelectric ceramic composition aimed at has a composition corresponding to a solid solution containing a first compound possessing a rhombohedral crystal-based perovskite structure, a second compound possessing a tetragonal crystal-based perovskite structure, and a third compound. The third compound is a compound oxide containing Bi as a first component element, Mn as a second component element, and a tetravalent metallic element or a pentavalent metallic element as a third component element. The tetravalent metallic element is at least one member selected from the group consisting of Ti, Zr, Hf, and Sn. The pentavalent metallic element is at least one member selected from the group consisting of Nb, Ta, and Sb.
摘要:
A method of manufacturing a ceramic includes forming a film which includes a complex oxide material having an oxygen octahedral structure and a paraelectric material having a catalytic effect for the complex oxide material in a mixed state, and performing a heat treatment to the film, wherein the paraelectric material is one of a layered catalytic substance which includes Si in the constituent elements and a layered catalytic substance which includes Si and Ge in the constituent elements. The heat treatment includes sintering and post-annealing. At least the post-annealing is performed in a pressurized atmosphere including at least one of oxygen and ozone. A ceramic is a complex oxide having an oxygen octahedral structure, and has Si and Ge in the oxygen octahedral structure.
摘要:
A ceramic powder composition, ceramic material, and a multi-layer ceramic capacitor fabricated thereby are provided. The ceramic powder composition includes a main ingredient and an accessory ingredient. The main ingredient is in an amount of 95 to 99 mol %, and includes BaTiO3, and the accessory ingredient is in an amount of 1 to 5 mol %, and consists of oxide Bi2O3—Tio2—XO, where X is selected from a group consisting of magnesium (Mg), vanadium (V), manganese (Mn), and chromium (Cr).
摘要:
A bismuth titanium silicon oxide having a pyrochlore phase, a thin film formed of the bismuth titanium silicon oxide, a method for forming the bismuth-titanium-silicon oxide thin film, a capacitor and a transistor for a semiconductor device including the bismuth-titanium-silicon oxide thin film, and an electronic device employing the capacitor and/or the transistor are provided. The bismuth titanium silicon oxide has good dielectric properties and is thermally and chemically stable. The bismuth-titanium-silicon oxide thin film can be effectively used as a dielectric film of a capacitor or as a gate dielectric film of a transistor in a semiconductor device. Various electronic devices having good electrical properties can be manufactured using the capacitor and/or the transistor having the bismuth-titanium-silicon oxide film.
摘要:
Provided are a piezoelectric thin film including a lead-free ferroelectric material and exhibiting high piezoelectric performance comparable to that of PZT, and a method of manufacturing the piezoelectric thin film. The piezoelectric thin film of the present invention has a multilayer structure in which a metal electrode film having a plane orientation of (100), a (Bi,Na)TiO3 film, and a (Bi,Na,Ba)TiO3 film having a plane orientation of (001) are laminated in this order. The piezoelectric thin film of the present invention can be applied to a wide range of fields and uses. For example, with the piezoelectric thin film of the present invention, an angular velocity sensor of the present invention having high sensitivity and a piezoelectric generating element of the present invention having excellent power generation characteristics can be constructed.
摘要:
The present invention provides a piezoelectric ceramic composition having a high thermal resistance and a high piezoelectric distortion constant and a piezoelectric element using the piezoelectric ceramic composition. The piezoelectric ceramic composition of the present invention contains Na, Bi, Ti, Cr and O, wherein the content ratio of Na, Bi, Ti and Cr in terms of oxides thereof falls within the following composition range: aNa2O-bBi2O3-cTiO2-dCrO where a, b, c and d are mole fractions; 0.030≦a≦0.042; 0.330≦b≦0.370; 0.580≦c≦0.620; 0≦d≦0.017; and a+b+c+d=1. The piezoelectric ceramic composition preferably has a main crystal phase of bismuth layer-structured ferroelectric, more preferably Na0.5Bi4.5Ti4O15 crystal. The piezoelectric element of the present invention includes a piezoelectric body formed of the piezoelectric ceramic composition and at least a pair of electrodes held in contact with the piezoelectric body.
摘要翻译:本发明提供一种具有高热阻和高压电变形常数的压电陶瓷组合物和使用压电陶瓷组合物的压电元件。 本发明的压电陶瓷组合物含有Na,Bi,Ti,Cr和O,其中Na,Bi,Ti和Cr的氧化物含量在下列组成范围内:aNa2O-bBi2O3-cTiO2-dCrO 其中a,b,c和d是摩尔分数; 0.030≦̸ a≦̸ 0.042; 0.330≦̸ b≦̸ 0.370; 0.580≦̸ c≦̸ 0.620; 0≦̸ d≦̸ 0.017; 和a + b + c + d = 1。 压电陶瓷组合物优选具有铋层结构的铁电体的主晶相,更优选为Na 0.5 B 4 4.5 Ti 4 O 15晶体。 本发明的压电元件包括由压电陶瓷组合物形成的压电体和与压电体保持接触的至少一对电极。
摘要:
A method of manufacturing a ceramic includes forming a film which includes a complex oxide material having an oxygen octahedral structure and a paraelectric material having a catalytic effect for the complex oxide material in a mixed state, and performing a heat treatment to the film, wherein the paraelectric material is one of a layered catalytic substance which includes Si in the constituent elements and a layered catalytic substance which includes Si and Ge in the constituent elements. The heat treatment includes sintering and post-annealing. At least the post-annealing is performed in a pressurized atmosphere including at least one of oxygen and ozone. A ceramic is a complex oxide having an oxygen octahedral structure, and has Si and Ge in the oxygen octahedral structure.
摘要:
A thin film capacitor element composition having a bismuth layered compound with a c-axis oriented substantially vertical to the substrate surface, wherein the bismuth layered compound is expressed by the formula (Bi2O2)2+(Am−1BmO3m+1)2− or Bi2Am−1BmO3M+3, the symbol m in the formula is an odd number, at least part of the Bi and/or A of the bismuth layered compound is substituted by a rare earth element, and the number of moles substituted by the rare earth element is larger than 1.0 and 2.8 or less with respect to the number of moles (m+1) of the total of Bi and A.
摘要翻译:一种薄膜电容器元件组合物,其具有基本上垂直于基板表面的c轴的铋层状化合物,其中所述铋层状化合物由式(Bi 2 O 2)2+(Am-1BmO 3 m + 1)2或Bi 2 Am -1BmO3M + 3,式中的符号m为奇数,铋层状化合物的Bi和/或A的至少一部分被稀土元素代替,并且被稀土元素取代的摩尔数 相对于Bi和A的总量的摩尔数(m + 1)大于1.0和2.8或更小。
摘要:
A piezoelectric ceramic composition having a large piezoelectric constant (d) and as well having a large Qm value is to be provided. The piezoelectric ceramic composition aimed at has a composition corresponding to a solid solution containing a first compound possessing a rhombohedral crystal-based perovskite structure, a second compound possessing a tetragonal crystal-based perovskite structure, and a third compound. The third compound is a compound oxide containing Bi as a first component element, Mn as a second component element, and a tetravalent metallic element or a pentavalent metallic element as a third component element. The tetravalent metallic element is at least one member selected from the group consisting of Ti, Zr, Hf, and Sn. The pentavalent metallic element is at least one member selected from the group consisting of Nb, Ta, and Sb.