The invention relates to multilayer oxide ceramic bodies and in particular presintered multilayer oxide ceramic blanks and oxide ceramic green bodies, which comprise at least two different layers and are suitable for dental applications, wherein at least one layer contains La.sub.2O.sub.3 and the at least two different layers differ in their content of La.sub.2O.sub.3. These bodies can be thermally densified by further sintering without distortion and are therefore particularly suitable for the production of dental restorations. The invention also relates to a process for the production of such multilayer oxide ceramic bodies as well as a process for the production of dental restorations using the multilayer oxide ceramic bodies.

Disclosed herein is a multilayer sintered ceramic body comprising at least one first layer comprising poly crystalline YAG, wherein the at least one first layer comprising poly crystalline YAG comprises pores wherein the pores have a maximum size of from 0.1 to 5 ?m, at least one second layer comprising alumina and zirconia wherein the zirconia comprises at least one of stabilized and partially stabilized zirconia, and at least one third layer comprising at least one of YAG, alumina, and zirconia, wherein an absolute value of the difference in coefficient of thermal expansion (CTE) between the at least one first, second and third layers is from 0 to 0.75?10-6/? C. as measured in accordance with ASTM E228-17, wherein the at least one first, second and third layers form a unitary, multilayer sintered ceramic body. Methods of making are also disclosed.

A sensor element (10) having a laminate structure, and extending in an axial direction AX, the sensor element including a first and second ceramic layers (118B, 115) disposed apart from each other in a laminating direction; a third ceramic layer (118) intervening between the first and second ceramic layers in the laminating direction and having a hollow space (10G) formed therein; and an internal space which is the hollow space surrounded by the first ceramic layer, the second ceramic layer, and the third ceramic layer, wherein, at a periphery (10f) of the internal space, a fourth ceramic layer (181) containing as a main component a ceramic material different from that contained as a main component in the first and third ceramic layers intervenes between the first ceramic layer and the third ceramic layer which are exposed to the internal space. Also disclosed is a method for manufacturing the gas sensor element.

A method of metallizing a ceramic substrate includes depositing a barrier layer onto the substrate, depositing a tie layer onto the barrier layer, and depositing a metal layer onto the tie layer to metallize the substrate. The barrier layer may include an oxygen rich material, a nitrogen rich material, or a carbon rich material.

A process for producing a non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer; said first powdery material has a presintering temperature T.sub.1 that is higher than the presintering temperature T.sub.S of said at least second powdery ceramic material; the course of a curve of shrinkage S.sub.1 of said at least first powdery ceramic material differs from the course of a curve of shrinkage S.sub.2 of said at least second powdery material, wherein curve of shrinkage S.sub.1 is shifted towards higher temperatures as compared to curve of shrinkage S.sub.2; and the layers are subjected to a common temperature treatment at a presintering temperature T.sub.S that is lower than the presintering temperature T.sub.1 and at least equal to T.sub.3 to cause sintering that remains in a stage of sintering that has not proceeded to the theoretical density; wherein the curve of shrinkage S.sub.1 is modified by admixing at least one component having a curve of shrinkage S.sub.3 which material is compatible with said powdery ceramic material into said first powdery ceramic material, i.e. has a grain size smaller than the first powdery ceramic material, to equalize the curves of shrinkage S.sub.1 and S.sub.2 in the region of the presintering temperature T.sub.S.

A Solid Oxide Electrolysis System has electrolytes with increased Area Specific Resistance, ASR yet is thin as compared to known electrolytes in the field, to obtain heating of the endothermic reducing process performed in the electrolysis cells directly where it is needed without any extra heating appliances or integrated heating elements, a simple efficient solution which does not increase the volume of the stack.

The disclosure relates to a ceramic shell, a mobile terminal and a method for manufacturing the ceramic shell. The ceramic shell includes a multi-layer ceramic blank sheet including a plurality of alternately overlapped ceramic blank sheets having at least one white ceramic blank sheet overlapped with at least one color ceramic blank sheet, wherein two of the plurality of alternately overlapped ceramic blank sheets on an outermost side of the multi-layer ceramic blank sheet are both white ceramic blank sheets.

A process for producing a non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer; said first powdery material has a presintering temperature T.sub.1 that is higher than the presintering temperature T.sub.s of said at least second powdery ceramic material; the course of a curve of shrinkage S.sub.1 of said at least first powdery ceramic material differs from the course of a curve of shrinkage S.sub.2 of said at least second powdery material, wherein curve of shrinkage S.sub.1 is shifted towards higher temperatures as compared to curve of shrinkage S.sub.2; and the layers are subjected to a common temperature treatment at a presintering temperature T.sub.s that is lower than the presintering temperature T.sub.1 and at least equal to T.sub.3 to cause sintering that remains in a stage of sintering that has not proceeded to the theoretical density; wherein the curve of shrinkage S.sub.1 is modified by admixing at least one component having a curve of shrinkage S.sub.3 which material is compatible with said powdery ceramic material into said first powdery ceramic material, i. e. has a grain size smaller than the first powdery ceramic material, to equalize the curves of shrinkage S.sub.1 and S.sub.2 in the region of the presintering temperature T.sub.s.

The invention relates to a method for producing a metal-ceramic substrate including first and second metallizations and at least one ceramic layer incorporated between the first and second metallizations. Advantageously, first and second metal layers and the at least one ceramic layer are stacked superposed, and in such a way that the free edge sections, of the first and second metal layers respectively, project beyond the edges of the at least one ceramic layer and the first and second metal layers are deformed toward each other in the region of the projecting free edge sections and directly connected to each other in order to form a gas-tight, sealed metal container enclosing a container interior for receiving the at least one ceramic layer. Subsequently, the metal layers forming the metal container with the at least one ceramic layer received in the container interior are hot isostatically pressed together in a treatment chamber at a gas pressure between 500 and 2000 bar and at a process temperature between 300 C. and the melting temperature of the metal layers for producing a preferably flat connection of at least one of the metal layers and the at least one ceramic layer, and at least the projecting free edge sections, which are connected to each other, of the metal layers for forming the first and second metallization are subsequently removed.

Disclosed herein are an interconnect for a solid oxide fuel cell and a method for manufacturing the same, the interconnect including: a conductive core; an oxidation-resistant insulating part receiving therein; and an oxidation-resistant conductive material layer coated on an exposed surface of the conductive core, which is exposed to an external environment by removing a portion of the oxidation-resistant insulating part, so that the interconnect can maintain durability against high-temperature heat generated from a flat type solid oxide fuel cell for a long time and thus have a very small voltage loss due to oxidation even with the use over a long-time period; have no sealing problem and no delaminating problem of a coating film due to a difference in coefficient of thermal expansion; be inexpensive; and have a simple structure.