Abstract: The invention relates to a piezoelectric multi-layer component with a plurality of piezoelectric layers (1) lying one above the other and with electrode layers (2a, 2b) arranged between the piezoelectric layers, wherein an absorption layer (4) of absorbing mechanical vibration energy is arranged in the layer stack.

Abstract: The invention relates to a method and to a system for injecting fuel into internal combustion engines, the injection taking place by way of an injection system and the fuel to be injected having an increased amount of fatty acids or fatty acid esters, particularly biodiesel. According to the invention, the components of the injection system coming into contact with the fuel are at least partially provided with a coating that has a low tendency for the agglomeration of fuel components, particularly fatty acids and fatty acid esters.

Abstract: A piezoelectric multi-layer component is described herein. The component includes a plurality of ceramic layers, and one or more electrode layer. The one or more electrode layer has a material structure that is different than the plurality of ceramic layers and is configured to at least partially block a propagation in a longitudinal direction of pressure waves acting on the piezoelectric multi-layer component.

Abstract: An arrangement is proposed for forming a piezoelectric actuator, which has at least one piezoelectric element that in each case consists of a multi-layer structure of piezoelectric-layers, wherein internal electrodes arranged between the piezoelectric-layers in the direction of the build-up of the layers of the piezoelectric element, have an electrical voltage of different polarity alternately applied to them. Around the piezoelectric element, or in the case of multiple piezoelectric elements positioned in series in the activation direction, around the piezoelectric elements, and at least partially around the actuator head and the actuator foot there is arranged a covering system made from at least one layer of an insulating material. The at least one layer encloses the joints between the piezoelectric element or elements and the actuator head and the actuator foot, forming a seal.

Abstract: A piezoelectric multi-layer component is described herein. The component includes a plurality of ceramic layers, and one or more electrode layer. The one or more electrode layer has a material structure that is different than the plurality of ceramic layers and is configured to at least partially block a propagation in a longitudinal direction of pressure waves acting on the piezoelectric multi-layer component.

Abstract: The invention relates to a piezoelectric multi-layer component with a plurality of piezoelectric layers (1) lying one above the other and with electrode layers (2a, 2b) arranged between the piezoelectric layers, wherein an absorption layer (4) of absorbing mechanical vibration energy is arranged in the layer stack.

Abstract: An arrangement is proposed for forming a piezoelectric actuator, which has at least one piezoelectric element that in each case consists of a multi-layer structure of piezoelectric-layers, wherein internal electrodes arranged between the piezoelectric-layers in the direction of the build-up of the layers of the piezoelectric element, have an electrical voltage of different polarity alternately applied to them. Around the piezoelectric element, or in the case of multiple piezoelectric elements positioned in series in the activation direction, around the piezoelectric elements, and at least partially around the actuator head and the actuator foot there is arranged a covering system made from at least one layer of an insulating material. The at least one layer encloses the joints between the piezoelectric element or elements and the actuator head and the actuator foot, forming a seal.

Abstract: A capacitor includes at least two pairs of opposing electrode layers and an intermediate dielectric layer. The intermediate dielectric layer includes a ceramic material that contains at least two different components existing in separate phases. The at least two different components have a perovskite structure that contains silver in A-positions and niobium and tantalum in B-positions. A composition of a first component and a composition of a second component are such that temperature coefficients of respective permittivities Tk?A and Tk?B have different signs within a temperature range.

Abstract: The invention relates to a capacitor with two or more opposing pairs of electrode layers (1) with an intermediate dielectric layer (2), in which the dielectric layers (2) comprise a ceramic material that contains at least two different components existing in separate phases, in which each component exhibits a perovskite structure that contains silver in the A-positions and niobium and tantalum in the B-positions, and in which the composition of a component A and the composition of a component B are each chosen in such a way that Tk?A and Tk?B exhibit different signs within a temperature range. The suitable mixing ratio of the components can, for example, be realized by stacking green compacts of component A on green compacts of component B in a suitable quantity.

Abstract: A ceramic material includes at least two different components. Each of the components is present in separate phases. Each of the components has a perovskite structure which contains silver in A positions and niobium or tantalum in B positions. A composition of a first component and a composition of a second component has respective permittivities TK?A and TK?B. In the ceramic material, temperature components of the permittivities TK?A and TK?B have different signs within a temperature interval.

Abstract: A method of producing a ceramic object includes producing particles of a type A and a type B. Each particle has a dimension of at least 5 ?m and each type of particle includes a ceramic material that is based on a mixture of silver oxide, niobium oxide and tantalum oxide. The method includes producing a particle mixture by mixing the types of particles, producing a green compact by compressing the particle mixture, and sintering the green compact.

Abstract: The invention relates to a ceramic material that contains at least two different components, each of which is present in phases separate from one another, in which each of the components exhibits a perovskite structure, which contains silver in the A positions and niobium and tantalum in the B positions, and in which the composition of a component A and the composition of a component B is each selected in such a way that the temperature coefficients of their relative permittivities TK&egr;A and TK&egr;B exhibit different signs within a temperature interval. The mixing ratio of component A to component B is advantageously selected in such a way as to produce, in keeping with the Lichtenecker rule, the most complete compensation possible of the temperature dependency of the temperature coefficients of the relative permittivities TK&egr;A and TK&egr;B.

Abstract: The invention relates to a method for producing a ceramic object (1) comprising the following steps:

Abstract: The invention relates to a microwave component with a main body (1), a coupling surface (6) and a decoupling surface (7), in which the main body (1) comprises a ceramic material that contains at least two different components, each of which is present in phases separate from one another, in which each of the components exhibits a perovskite structure, which contains silver in the A positions and niobium and tantalum in the B positions, and in which the composition of a component A and the composition of a component B is each selected in such a way that the temperature coefficients of their relative permittivities TK&egr;A and TK&egr;B exhibit different signs within a temperature interval. The mixing ratio of component A to component B is advantageously selected in such a way as to produce, in keeping with the Lichtenecker rule, the most complete compensation possible of TK&egr;A and TK&egr;B.