摘要:
A piezoelectric actuator 1 includes a piezoelectric element 2, which has a pair of electrodes formed on the surface of a piezoelectric ceramic member, as a drive source. The piezoelectric actuator 1 satisfies at least one of the following requirements (a) to (c): (a) the variation width WC in an apparent dynamic capacity C [F] due to a change in temperature should fall within ±11% over a specific temperature range from −30° C. to 80° C.; (b) the variation width WL in a displacement L [μm] due to a change in temperature should fall within ±14% over the specific temperature range from −30° C. to 80° C.; and (c) the variation width WL/C in a quotient L/C due to a change in temperature should fall within ±12% over the specific temperature range from −30° C. to 80° C., wherein C [F] denotes the apparent dynamic capacity and L [μm] denotes the displacement.
摘要翻译:压电致动器1包括压电元件2,其具有形成在压电陶瓷构件的表面上的一对电极作为驱动源。 压电致动器1满足以下要求(a)至(c)中的至少一个:(a)由于温度变化导致的表观动态电容C [F]中的变化宽度W C C 应在-30°C至80°C的特定温度范围内落在±11%以内。 (b)由于温度变化引起的位移L [m]中的变化宽度W L L应在-30℃至80℃的特定温度范围内落在±14%以内。 ; 和(c)由于温度变化引起的商L / C中的变化宽度W L / C在-30℃至80℃的特定温度范围内应该在±12%以内 C.其中C [F]表示表观动态容量,L [mum]表示位移。
摘要:
A rotary component of a rotary device for heat engines, such as a turbine wheel of a gas turbine or a turbocharger, formed in an integral ceramic-fiber-reinforced sintered ceramic structure. The reinforcing ceramic fibers in the edges of the vanes of the rotary component are oriented radially to prevent the chipping of the edges of the vanes liable to occur in a direction perpendicular to the direction of thickness of the vanes. The rotary component is formed by molding a mixture of a ceramic powder, ceramic fibers and organic additive or additives in a mold having a cavity having the same shape as that of the rotary component except that the depth of sections of the cavity corresponding to the vanes is greater than the height of the vanes to be formed, sintering the molding, and cutting the vanes of the molding in a predetermined height.
摘要:
A piezoelectric actuator 1 includes a piezoelectric element 2, which has a pair of electrodes formed on the surface of a piezoelectric ceramic member, as a drive source. The piezoelectric actuator 1 satisfies at least one of the following requirements (a) to (c): (a) the variation width WC in an apparent dynamic capacity C [F] due to a change in temperature should fall within ±11% over a specific temperature range from −30° C. to 80° C.; (b) the variation width WL in a displacement L [μm] due to a change in temperature should fall within ±14% over the specific temperature range from −30° C. to 80° C.; and (c) the variation width WL/C in a quotient L/C due to a change in temperature should fall within ±12% over the specific temperature range from −30° C. to 80° C., wherein C [F] denotes the apparent dynamic capacity and L [μm] denotes the displacement.
摘要翻译:压电致动器1包括压电元件2,其具有形成在压电陶瓷构件的表面上的一对电极作为驱动源。 压电致动器1满足以下要求(a)至(c)中的至少一个:(a)由于温度变化导致的表观动态电容C [F]中的变化宽度W C C 应在-30°C至80°C的特定温度范围内落在±11%以内。 (b)由于温度变化引起的位移L [m]中的变化宽度W L L应在-30℃至80℃的特定温度范围内落在±14%以内。 ; 和(c)由于温度变化引起的商L / C中的变化宽度W L / C在-30℃至80℃的特定温度范围内应该在±12%以内 C.其中C [F]表示表观动态容量,L [mum]表示位移。
摘要:
A piezoelectric sensor capable of preventing fluctuation in the sensitivity of the piezoelectric sensor over a wide temperature range is provided. This is a piezoelectric sensor comprising a piezoelectric element and a holding member for holding the piezoelectric element, the piezoelectric element comprising a piezoelectric ceramic having formed on the surfaces thereof a pair of electrodes. The piezoelectric ceramic satisfies the following requirement (a) and/or requirement (b): (a) in the temperature range from −30° C. to 160° C., the thermal expansion coefficient is 3.0 ppm/° C. or more, and (b) in the temperature range from −30° C. to 160° C., the pyroelectric coefficient is 400 μCm−2K−1 or less.
摘要:
To provide a grain oriented ceramic capable of exerting excellent piezoelectric properties, a production method thereof, and a piezoelectric material, a dielectric material, a thermoelectric conversion element and an ion conducting element each using the grain oriented ceramic, there is provided a grain oriented ceramic comprising, as the main phase, an isotropic perovskite-type compound which is represented by formula (1): {Lix(K1−yNay)1−x}(Nb1−z−wTazSbw)O3 in which x, y, z and w are in respective composition ranges of 0≦x≦0.2, 0≦y≦1, 0≦z≦0.4, 0≦w≦0.2 and x+z+w>0. The main phase comprises a polycrystalline body containing from 0.0001 to 0.15 mol of any one or more additional element selected from metal elements, semimetal elements, transition metal elements, noble metal elements and alkaline earth metal elements belonging to Groups 2 to 15 of the Periodic Table, per mol of the compound represented by formula (1). A specific crystal plane of each crystal grain constituting said polycrystalline body is oriented.
摘要翻译:为了提供能够发挥优异的压电性能的晶粒取向陶瓷,其制造方法以及使用晶粒取向陶瓷的压电材料,电介质材料,热电转换元件和离子传导元件,提供了晶粒取向陶瓷 包括作为主相的由式(1)表示的各向同性的钙钛矿型化合物:{Li x Si(K 1-y Na y) 1/2)(Nb 1-z z)Z z O z O z O 2) 3,其中x,y,z和w分别为0 <= x <= 0.2,0 <= y <=1,0,0≤z≤0.4,0<= w < 0.2和x + z + w> 0。 主相包括含有0.0001-0.15mol选自属于元素周期表第2至15族的金属元素,半金属元素,过渡金属元素,贵金属元素和碱土金属元素中的任何一种或多种附加元素的多晶体 每摩尔由式(1)表示的化合物。 构成所述多晶体的每个晶粒的特定晶面被取向。
摘要:
A physical sensor having a pressure sensing layer having such property that electrical resistance is changed by application of a stress, and electrical insulating layers which are integrally formed on opposite two surfaces of the pressure sensing layer, respectively. The pressure sensing layer comprises a matrix comprising glass, and an electrically conductive particle having electrical conductivity and dispersed in the matrix. Preferably, the electrically conductive particle comprises RuO2, and a thickness of the pressure sensing layer is 1 μm to 200 μm. It is preferable that one pair of electrodes are disposed on the pressure sensing layer.
摘要翻译:具有压力感测层的物理传感器,其具有通过施加应力而使电阻发生变化的特性,以及分别一体地形成在压力感测层的相对的两个表面上的电绝缘层。 压力感测层包括包含玻璃的基体和具有导电性并分散在基质中的导电颗粒。 优选地,导电颗粒包括RuO 2 N 2,并且压力感测层的厚度为1μm至200μm。 优选地,一对电极设置在压力感测层上。
摘要:
This invention provides a piezoelectric ceramic composition that does not contain lead, can be sintered at a normal pressure and is excellent in at least one of a piezoelectric constant, an electro-mechanical coupling coefficient, a dielectric loss, a relative dielectric constant and a Curie point, its production method, and a piezoelectric device and a dielectric device each utilizing the piezoelectric ceramic composition. The invention relates to a piezoelectric composition expressed by the general formula {Lix(K1−yNay)1−x}(Nb1−zSbz)O3, each of x, y and z respectively falling within composition ranges of 0≦x≦0.2, 0≦y≦1.0 and 0≦z≦0.2 (with the exception of x=z=0), and its production method. The invention further relates to a piezoelectric device having a piezoelectric body formed of the piezoelectric ceramic composition described above and a dielectric device having a dielectric body formed of the piezoelectric ceramic composition described above.
摘要翻译:本发明提供一种不含铅的压电陶瓷组合物,其可以在常压下烧结,并且在压电常数,机电耦合系数,介电损耗,相对介电常数和居里中的至少一种方面优异 点,其制造方法,以及各自利用压电陶瓷组合物的压电器件和电介质器件。 本发明涉及一种压电组合物,由下列通式表示:(1)x(x,y)y(x) (Nb 1-z Sb 3 z O)O 3,x,y和z各自分别在 0 <= x <= 0.2,0 <= y <= 1.0,0 <= z <= 0.2(x = z = 0除外)及其制作方法。 本发明还涉及一种具有由上述压电陶瓷组合物形成的压电体的压电器件和具有由上述压电陶瓷组合物构成的电介体的电介质器件。
摘要:
A physical sensor having a pressure sensing layer having such property that electrical resistance is changed by application of a stress, and electrical insulating layers which are integrally formed on opposite two surfaces of the pressure sensing layer, respectively, wherein the pressure sensing layer has a matrix comprising glass, and an electrically conductive particle having electrical conductivity and dispersed in the matrix and preferably, the electrically conductive particle includes RuO2, and a thickness of the pressure sensing layer is 1 μm to 200 μm, and it is preferable that one pair of electrodes are disposed on the pressure sensing layer.
摘要翻译:一种物理传感器,其具有通过施加应力而具有使电阻发生变化的性质的压力感测层,以及一体地形成在压力感测层的相对的两个表面上的电绝缘层,其中压力感测层具有矩阵 包含玻璃和具有导电性并分散在基质中的导电颗粒,并且优选地,导电颗粒包括RuO 2 N 2,并且压力感测层的厚度为1μm至200μm,以及 优选地,一对电极设置在压力感测层上。
摘要:
To provide a production method of a polycrystalline ceramic body with excellent density, a preparation step, a mixing step, a forming step and a heat-treating step are performed. In the preparation step, a coarse particle ceramic powder, and a fine particle powder having an average particle diameter of ⅓ or less of the average particle diameter of the coarse particle ceramic powder are prepared. In the mixing step, the coarse particle ceramic powder and the fine particle powder are mixed to produce a raw material mixture. In the forming step, the raw material mixture is formed to a shaped body. In the heat-treating step, the shaped body is heated and thereby sintered to produce a polycrystalline ceramic body. In the heat-treating step, a temperature elevating process and a first holding process are performed and at the same time, a second holding process and/or a cooling process are performed. In the temperature elevating process, heating is started to elevate the temperature and in the first holding process, the shaped body is held at a temperature T1° C. In the second holding process, the shaped body is held at a temperature T2° C. lower than the temperature T1° C. In the cooling process, the shaped body is cooled at a temperature dropping rate of 60° C./h or less from the temperature T1° C.
摘要:
The piezoelectric actuator includes a piezoelectric element (2) including a sheet of piezoelectric ceramic and electrodes formed at least part of the surface of the sheet of piezoelectric ceramic, and a holding member (4) holding the piezoelectric element (2); The piezoelectric at least one of the requirements (a) to (e) described below; (a) The bulk density shall be equal to or smaller than 5 g/cm3, and the Young's modulus Y11E calculated according to a resonance-antiresonance method shall be equal to or larger than 90 GPa; (b) The coefficient of thermal conductivity shall be equal to or larger than 2 Wm−1K−1; (c) The coefficient of thermal expansion shall be equal to or larger than 3.0 ppm/° C. over a temperature range from −30° C. to 160° C.; (d) The pyroelectric coefficient shall be equal to or smaller than 400 μCm−2K−1 over the temperature range from −30° C. to 160° C.; (e) The mechanical quality factor Qm calculated according to the resonance-antiresonance method shall be equal to or smaller than 50 over a temperature range from −30° C. to 80° C.