摘要:
Lead of ternary or quaternary piezoelectric ceramic compound is decreased by 0.1 to 5 percent by mole with respect to piezoelectric ceramic compound expressed by the chemical formula of �Pb(Mn.sub.1/3 Sb.sub.2/3)O.sub.3 !.sub.x �PbZrO.sub.3 !.sub.y �PbTiO.sub.3 !.sub.z where x+Y+z=1 or the piezoelectric ceramic compound the lead of which is partially replaced with calcium, barium or strontium, and the decrease of lead prevent the ternary or quaternary piezoelectric ceramic compound from undesirable segregation of lead compound at the grain boundaries so as to improve the mechanical output.
摘要翻译:相对于化学式[Pb(Mn + E,fra 1/3 + EE Sb + E,fra 2/3)表示的压电陶瓷化合物,三元或四元压电陶瓷化合物的铅减少0.1〜5摩尔% + EE)O 3] x [PbZrO 3] y [PbTiO 3] z其中x + Y + z = 1或其铅被部分被钙,钡或锶替代的压电陶瓷化合物,并且铅的减少防止三元或 四级压电陶瓷化合物由于在晶界上不合要求的铅化合物分离,从而提高机械输出。
摘要:
A manufacturing method for dielectric ceramic compositions of lead-based perovskite containing lead magnesium tungstate [Pb(Mg.sub.1/2 W.sub.1/2)O.sub.3 ] as a component which is characterized in that magnesium tungstate powder [MgWO.sub.4 ] is used as a starting material instead of MgO and WO.sub.3 powder.
摘要:
A method of producing a laminated type electrostrictive effect element composed of a plurality of layers of electrostrictive material and a plurality of thin internal electrodes placed between adjacent layers of the electrostrictive material. The internal electrodes are exposed in side surfaces of the electrostrictive element parallel to the direction of lamination. Alternate internal electrodes are electrically connected in common to form a first group and a second group of internal electrodes, for connection to a power supply to produce a longitudinal electrostrictive strain in the direction of lamination. The method of the invention provides an efficient technique for electrically connecting alternate internal electrodes in common. The method involves forming an insulating layer of inorganic material such as glass or glass-ceramics over the portions of the exposed internal electrodes which are not to be electrically connected. The inorganic insulating material is formed by an electrophoretic process and sintered to produce an integral body consisiting of the internal electrodes, the electrostrictive material and the inorganic insulating material. In one embodiment of the invention the laminated type electrostrictive effect element is immersed in a suspension solution containing electrically charged glass powder. A voltage is applied to the internal electrodes on which the insulating layer is to be formed and an opposing electrode plate in the suspension solution is connected to the opposite polarity supply voltage. The positively charged glass powder is thereby deposited on the exposed portions of the internal electrodes connected to the voltage supply of selected polarity. Alternatively, the laminated type electrostrictive effect element is immersed in a suspension solution containing previously charged glass powder to deposit the glass powder onto the entire surface of the laminated structure. Thereafter, an electric field is applied between the internal electrodes on which the insulating layer is not to be formed and an opposing electrode plate disposed within the suspension to remove the glass powder from the selected internal electrodes.
摘要:
In an electrostriction transducer comprising protection layers (21, 22) in which no electric fields are produced during operation, each of end electrostriction layers (41, 42) which are contiguous to the respective protection layers with pertinent ones of internal electrodes (16, 17) interposed, is given a thicker thickness (at) as compared with other or intermediate electrostriction layers (23) to make the transducer have a long life and a high reliability. The intermediate electrostriction layers may have a common thickness (t). Alternatively, the intermediate electrostriction layers may have monotonously decreasing thicknesses when placed nearer to a plane which bisects a pile (19) of the electrostriction layers parallel to both end surfaces of the pile. When a pair of holding members for the transducer are used on both longitudinal ends, each protection layer is preferably received in an indent formed in the holding member. Alternatively, it is preferred that each holding member should comprise a metal plate contiguous to the protection layer and a metal band surrounding parts of the metal plate and the protection layer.
摘要:
A piezoelectric actuator unit which undergoes less change in the amount of displacement and shows high durability in continuous operation under a high voltage and a high pressure over a long period of time is provided.The piezoelectric actuator unit including a multi-layer piezoelectric element having piezoelectric layers and metal layers with the piezoelectric layers and the metal layers being stacked one on another, and a case which houses the multi-layer piezoelectric element, wherein at least one of the plurality of metal layers is stress relieving layer which consists of a plurality of partial metal layers that are scattered throughout the entire region between two piezoelectric layers which adjoin the partial metal layers in the direction of stacking, and voids, and a peel-off section is formed at least in a part of the interface between the stress relieving layer and the piezoelectric layer that adjoins therewith.
摘要:
A multi-layer piezoelectric element includes a stack having metal layers and piezoelectric layers stacked one on another, and a pair of external electrodes formed on the side faces of the stack. At least one of the metal layers is a stress relieving layer having partial metal layers scattered between the two piezoelectric layers and voids. Junction sections are formed between the two piezoelectric layers to join and are disposed on both sides of an imaginary straight line drawn to connect the center of width of one of the external electrodes and the center of width of the other of the external electrodes in a plane including the stress relieving perpendicular to the stacking direction.
摘要:
A piezoceramic multilayer actuator has a first sub-stack (12, 14, 16) with a plurality of piezoceramic layers (22) and at least one internal electrode (24, 26), the piezoceramic layers (22) and the at least one internal electrode (24, 26) being laminated in an alternating manner, a second sub-stack (12, 14, 16) has a plurality of piezoceramic layers (22) and at least one internal electrode (24, 26), the piezoceramic layers (22) and the at least one internal electrode (24, 26) being laminated in an alternating manner, and a connection layer (40) arranged between the first sub-stack (12, 14, 16) and the second sub-stack (12, 14, 16), wherein the connection layer (40) is set up by a multitude of single connection points or connection lines (44) or other connection regions.
摘要:
A piezoceramic multilayer actuator (10) has a plurality of piezoceramic layers (12), a security layer (20) and a plurality of inner electrodes (16, 18). The piezoceramic layers (12) has a piezoceramic first material sintered at a sintering temperature. The security layer (20) has a second material and is disposed between two piezoceramic layers (12). Each of the plurality of inner electrodes (16, 18) has a third material and is deposited between two piezoceramic layers (12). The degree of sintering of the second material is lower than the degree of sintering of the third material.
摘要:
An electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus are provided which not only secure mechanical strength sufficiently but also bring a vast improvement in charge transport performance and which can well satisfy electrical properties. An electrophotographic photosensitive member is provided an outermost surface layer of which contains at least a charge transporting compound having chain polymerizable functional groups which is represented by the following general formula (1-1) or (1-2); the charge transporting compound having been polymerized or cross-linked and cured. Also provided are a process cartridge and an electrophotographic apparatus which have such a photosensitive member.
摘要:
A six-legged type piezoelectric vibration gyroscope having a pair of exciting arms extending from a body (2) in a first direction (A1) with a space therebetween, one non-exciting arm (3c) extending in the first direction between the exciting arms from the body, a pair of detecting arms (4a, 4b) extending from the body in a second direction (A2) with a space therebetween, and one non-detecting arm (4c) extending in the second direction between the detecting arms from the body. The exciting arms are coupled with a drive-side electrode. The detecting arms are coupled with a detection-side electrode. The exciting arms, non-exciting arm, detecting arms, and non-detecting arm respectively consist of a piezoelectric. The respective exciting arms differ in width size from the non-exciting arm. The respective exciting arms differ in width size from the respective detecting arms. The respective exciting arms differ in width size from the non-detecting arm.