摘要:
Anti-reducing semiconducting porcelain having a positive temperature coefficient of resistance comprises a barium titanate composition, and a flux containing 0.14 to 2.88 parts by weight of TiO.sub.2 0.1 to 1.6 parts by weight of Al.sub.2 O.sub.3 and 0.1 to 1.6 parts by weight of SiO.sub.2 per 100 parts by weight of the barium titanate composition. It has a high positive temperature coefficient of resistance which does not show any appreciable change in the presence of a reducing atmosphere, such as hydrogen gas or gasified gasoline. It need not be isolated from a reducing atmosphere by a plastic or metallic enclosure, but can be exposed thereto. The flux may further contain a zinc, potassium or lithium compound.
摘要:
A self-temperature controlling type heating device comprises a positive temperature coefficient ceramic resistor having a thin layer portion, a first electrode provided on one face of the thin layer portion, a second electrode provided on the other face of the thin layer portion opposite to the first electrode, and at least one third electrode provided on the surface of the PTC ceramic resistor in spaced relation to the first electrode. An electric current is allowed to flow between the first and second electrodes to form a heating element, and an electric resistance value between the first and third electrodes is detected to thereby make a temperature control. Thus, a high output is obtained at a low voltage and the control temperature is freely varied.
摘要:
A piezoelectric ceramic composition, having a tetragonal perovskite structure and represented by a general formula PbaSrb(ZrcTidSbeMnf)O3 wherein Pb and Sr are assumed to occupy A site, Zr, Ti, Sb and Mn are assumed to occupy B site, and a molar ratio of A site/B site atoms of (a+b)/(c+d+e+f) is more than 1.00 to 1.03, preferably 0.01 to 0.03.
摘要翻译:假设具有四方钙钛矿结构并由通式PbaSrb(ZrcTidSbeMnf)O3表示)的压电陶瓷组合物,其中假定Pb和Sr占据A位,Zr,Ti,Sb和Mn占B位,摩尔比 (a + b)/(c + d + e + f)的A位点/ B位原子大于1.00〜1.03,优选为0.01〜0.03。
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:
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 laminate type dielectric device is formed by alternately laminating dielectric ceramic layers and electrode layers and integrally baking the laminate product. The electode layers are mainly made of an electrically conductive base metal material having greater standard Gibbs free energy for the formation of a metal oxide at a baking temperature than that of the ceramic material constituting the dielectric ceramic layers. Segregation of the materials including the electrically conductive base metal material does not occur at portions sandwiched between adjacent positive and negative electrode layers among the dielectric ceramic layers.
摘要:
An integrally fired, laminated electromechanical transducing element, fabricated using an inexpensive electrode material and having the electrode characteristic at least equivalent to that of the Ag—Pd electrode, is disclosed. Especially, in the integrally fired, laminated electromechanical transducing element according to the invention, (A) the rigidity of the internal electrode layers is low and the internal stress generated at the time of expansion or contraction of the ceramic layers is small, (B) the antimigration characteristic is superior, (C) the charge loss is small, the heat conductivity is high and the heat radiation characteristic is superior, and/or (D) the bonding strength between the ceramic layers and the electrode layers is high. The integrally fired, laminated electromechanical transducing element (1) according to the invention comprises, for example, an integrally fired laminate member fabricated by integrally firing a plurality of the ceramic layers (11) of piezoelectric ceramic or electrostrictive ceramic and the internal electrode layers (21, 22) interposed between the ceramic layers (11). The main component of the internal electrode layers (21, 22) is a base metal having a rigidity of not more than 160 GPa.
摘要:
A stacked piezoelectric element obtained by alternately stacking a piezoelectric ceramic layer and an electrode layer, wherein said electrode layer mainly comprises an electrically conducting base metal electrode material, and the region held between the electrode layer positioned at the top of each ceramic layer and the electrode layer positioned at the bottom of each ceramic layer contains a material having no piezoelectricity, in which a constituent element of said material having no piezoelectricity is uniformly dispersed so as not to have local distribution of a distributed strength exceeding 2 times the distributed strength which is distributed in a largest number of places and is not 0.
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.