A three-dimensional shaped article production method for producing a three-dimensional shaped article by stacking layers to form a stacked body includes a constituent layer formation step of forming a constituent layer which corresponds to a constituent region of the three-dimensional shaped article, a support layer formation step of forming a support layer which is in contact with the constituent layer and supports the constituent layer, and a sintering step of sintering the constituent layer, wherein the support layer is configured such that as compared with the volume decrement accompanying the sintering step of a space surrounded by the constituent layer from at least two directions, the volume decrement accompanying the sintering step of the support layer which supports the constituent layer in the space is larger.

A piezoelectric element to be used between a lowest use temperature T1 and a highest use temperature T2 includes a first electrode, a piezoelectric layer provided on the first electrode and made of a piezoelectric material including a composite oxide having a perovskite structure, and a second electrode provided on the piezoelectric layer, in which the piezoelectric material includes a morphotropic phase boundary which is inclined with respect to a temperature axis, and the piezoelectric material satisfies at least one of formulas T3≤T1≤T4 and T3≤T2≤T4, where a temperature corresponding to the morphotropic phase boundary is T3 at a lowest point, and is T4 at a highest point.

Metall-Keramik-Substrat, insbesondere Substrat für elektrische Schaltkreise oder Module mit wenigstens einer eine erste Oberflächenseite des Metall-Keramik-Substrates bildenden Metallschicht und mit wenigstens einer eine zweite Oberflächenseite des Metall-Keramik-Substrates bildenden Metallschicht, wobei diese äußeren Metallschichten jeweils durch Bonden flächig mit den Oberflächenseiten eines plattenförmigen Substratkörpers verbunden sind.

Disclosed is a honeycomb structure configured to include a pillar-shaped honeycomb unit divided by cell walls. In the honeycomb structure, a pair of electrodes is arranged at the cell walls and/or a peripheral wall of the honeycomb unit, the cell walls of the honeycomb unit are composed of a ceramic aggregate and pores formed in the aggregate, and the cell walls contain a substance having an electrical resistivity lower than an electrical resistivity of ceramic forming the aggregate.

Die Erfindung betrifft ein keramisches Vielschicht-Bauelement mit einem Stapel alternierender Keramikschichten und als Innenelektroden dienender kupferhaltiger Elektrodenschichten, die an Außenkontakte angeschlossen sind, sowie Verfahren zur Herstellung des Bauelements. Erfindungsgemäß enthalten die Außenkontakte metallisches Kupfer, wobei in dem an der Grenzfläche zwischen den Außenkontakten und den Keramikschichten anliegenden Grenzbereich die Außenkontakte nicht oxidiert sind und das Material der Keramikschichten nicht reduziert ist und wobei die Haftfestigkeit der Außenkontakte am Stapel den Wert von 50 N übersteigt. Erfindungsgemäß erfolgt die Entbinderung bei einer vergleichsweise niedrigen Temperatur von max 300°C in einer feuchten Stickstoffatmosphäre.

The present invention provides a ceramic green sheet with a thin flat plate shape obtained by molding and solidifying a ceramic slurry, which contains a ceramic powder, dispersion medium, and gelling agent, into a thin flat plate. The ceramic green sheet partially includes a body that is obtained by molding and solidifying a conductor paste, which becomes a conductor later, and the body is exposed on a part of each of the both surfaces of the sheet. Plural ceramic green sheets described above are produced. The plural ceramic green sheets are successively stacked and press-bonded in the thickness direction in such a manner that the bodies included in the respective sheets are connected to each other for all combinations of the adjacent two sheets. As a result, a ceramic green sheet laminate is formed, which includes one body that is obtained by connecting the bodies included in the respective sheets.

A composite ceramic green sheet (CG2) comprising: a first sheet portion (R1, C1) comprising a first sheet material (3); a second sheet portion (R2, C2) comprising a second sheet material (4), said second sheet portion (R2, C2) differing in firing behaviour from said first sheet portion (R1, C1); and a mixed portion(RM, CM) provided between said first and second sheet portions (R1, C1, R2, C2) comprising a mixture of said first and second sheet materials (3, 4), and having a width (SMW2) at least twice as large as a thickness (ST2) of the composite ceramic green sheet, wherein said first and second sheet portions (R1, C1, R2, C2) are integrated with each other through said mixed portion (RM, CM) in a spread direction.

To form a high-quality resistor pattern and conductor pattern on an external surface of a multilayer ceramic substrate by an ink jet method.

A composite sheet (11) including a first ceramic green layer (2a) and a shrinkage-retardant layer (10) is formed, and a resistor pattern (4) and a conductor pattern (5) are formed on the first ceramic green layer (2a) of the composite sheet (11) by an ink jet method. Subsequently, a plurality of second ceramic green layers (3a) are stacked with the composite sheet (11) such that the shrinkage-retardant layer (10) of the composite sheet (11) defines the outermost layer, thus forming a multilayer composite (13) including a unfired multilayer ceramic substrate (1a) and the shrinkage-retardant layer (10). Then, the multilayer composite (13) is fired, and the shrinkage-retardant layer (10) is removed to obtain a sintered multilayer ceramic substrate (1).

A thin plate member (10) is a thin plate member that is formed by sintering, contains a ceramic layer, and comprises a thin part having two or more types of layers laminated, each of which is made of a material having a different thermal expansion coefficient, and a thick part that is made by laminating plural layers including at least all of the layers constituting the thin part, and has a thickness (tB) greater than the thickness of the thin part. The thin part has a shape warping in the direction perpendicular to the plane of the thin plate member. By virtue of this configuration, the internal electrical resistance of the thin part can be reduced. Further, the thin plate member can be provided that is difficult to be deformed with respect to the internal stress caused by the difference in thermal expansion coefficient between layers.

A method for producing a crystallographically-oriented ceramic includes the steps of forming a first sheet with a thickness of 10 µm or less containing a first inorganic material in which grain growth occurs at a first temperature or higher and a second sheet containing a second inorganic material in which grain growth occurs at a second temperature higher than the first temperature, laminating one or more each of the first and second sheets to form a laminated body, firing the laminated body at a temperature equal to or higher than the first temperature and lower than the second temperature to cause grain growth in the first inorganic material, and then firing the laminated body at a temperature equal to or higher than the second temperature to cause grain growth in the second inorganic material in the direction of a crystal plane of the first inorganic material.