Saint-gobain Ceramics & Plastics, Inc.

Other

Saint-gobain Centre De Recherches Et D'etudes Europeen

Coorstek, Inc.

Saint-gobain Abrasives, Inc.

Saint-gobain Abrasifs

Yeshwanth Narendar

Guangyong Lin

Aravind Mohanram

Oh-Hun Kwon

Richard F Buckley

John D Pietras

F Michael Mahoney

Wesley R Robbins

Matthew A Simpson

Samuel Marlin

Christopher J Reilly

Brian C LaCourse

Morteza Zandi

Sethumadhavan Ravichandran

Arunvel Thangamani

Karen M Conley

Signo T Reis

Caroline Levy

Brian P Feldman

Richard R Hengst

Hansong Huang

Rakesh Kapoor

Robin Chandras Jayaram

Brian Rutkiewicz

Remi J Goulet

Zachary R Patterson

Qiang Zhao

Robert J Sliwoski

Matthieu Jérôme Schwartz

Daniel René Urffer

Thierry Desire

Signo Tadeu Reis

Matthieu Schwartz

Rajappa Tadepalli

Vivek Singh

A glass-ceramic seal for ionic transport devices such as solid oxide fuel cell stacks or oxygen transport membrane applications. Preferred embodiments of the present invention comprise glass-ceramic sealant material based on a Barium-Aluminum-Silica system, which exhibits a high enough coefficient of thermal expansion to closely match the overall CTE of a SOFC cell/stack (preferably from about 11 to 12.8 ppm/&#xb0; C.), good sintering behavior, and a very low residual glass phase (which contributes to the stability of the seal).

Sanbornite-based glass-ceramic seal for high-temperature applications

A sintered ceramic component can have a final composition including at least 50 wt. % MgO and at least one desired dopant, wherein each dopant of the at least one desired dopant has a desired dopant content of at least 0.1 wt. %. All impurities (not including the desired dopant(s)) are present at a combined impurity content of less than 0.7 wt. %. A remainder can include AlO. The selection of dopants can allow for better control over the visual appearance of the sintered ceramic component, reduces the presence of undesired impurities that may adversely affect another part of an apparatus, or both. The addition of the dopant(s) can help to improve the sintering characteristics and density as compared to a sintered ceramic component that includes the material with no dopant and a relatively low impurity content.

Sintered ceramic component and a process of forming the same

Embodiments of the present disclosure relate to a hot press and methods of using the hot press. In an embodiment, the hot press can include a pressing element including a flared body. In another embodiment, the hot press can include a compression surface. The compression surface can include a first layer including a monocrystalline material and a second layer including a polycrystalline material, wherein the monocrystalline material and the polycrystalline material include a same primary compound. In a further embodiment, a sample including more than one layer of ceramic oxide material can be hot pressed without a die.

Hot press and method of using

An interconnect of a solid oxide fuel cell article is disclosed. The interconnect is disposed between a first electrode and a second electrode of the solid oxide fuel cell article. The interconnect comprises a first phase including a ceramic interconnect material and a second phase including partially stabilized zirconia. The partially stabilized zirconia may be in a range of between about 0.1 vol % and about 70 vol % of the total volume of the interconnect.

Solid oxide fuel cell interconnects including a ceramic interconnect material and partially stabilized zirconia

An interconnect material is formed by combining a lanthanum-doped strontium titanate with an aliovalent transition metal to form a precursor composition and sintering the precursor composition to form the interconnect material. The aliovalent transition metal can be an electron-acceptor dopant, such as manganese, cobalt, nickel or iron, or the aliovalent transition metal can be an electron-donor dopant, such as niobium or tungsten. A solid oxide fuel cell, or a strontium titanate varistor, or a strontium titanate capacitor can include the interconnect material that includes a lanthanum-doped strontium titanate that is further doped with an aliovalent transition metal.

Highly sinterable lanthanum strontium titanate interconnects through doping

A solid oxide fuel cell includes an anode layer, a cathode layer, and an electrolyte layer partitioning the anode layer and the cathode layer. The anode layer and the cathode layer are of about the same thickness and have about the same coefficient of thermal expansion (CTE).

Substantially flat single cells for SOFC stacks

A bonding layer, disposed between an interconnect layer and an electrode layer of a solid oxide fuel cell article, may be formed from a yttria stabilized zirconia (YSZ) powder having a monomodal particle size distribution (PSD) with a dthat is greater than about 1 &#x3bc;m and a dthat is greater than about 2 &#x3bc;m.

Solid oxide fuel cell interconnect cells

A solid oxide fuel cell (SOFC) includes a plurality of sub-cells. Each sub-cell includes a first electrode in fluid communication with a source of oxygen gas, a second electrode in fluid communication with a source of a fuel gas, and a solid electrolyte between the first electrode and the second electrode. The SOFC further includes an interconnect between the sub-cells. In one embodiment, the SOFC has a first surface in contact with the first electrode of each sub-cell and a second surface that is in contact with the second electrode of each sub-cell; and the interconnect consists essentially of a doped M-titanate based perovskite, wherein M is an alkaline earth metal. In another embodiment, the interconnect includes a first layer in contact with the first electrode of each sub-cell, and a second layer in contact with the second electrode of each sub-cell. The first layer includes an electrically conductive material selected from the group consisting of an metal, a metal alloy and a mixture thereof. The second layer includes a doped M-titanate based perovskite, wherein M is an alkaline earth metal. A solid oxide fuel cell described above is formed by connecting each of the sub-cells with an interconnect described above.

Titanate and metal interconnects for solid oxide fuel cells

An anisotropic coefficient of thermal expansion (CTE) cathode of a solid oxide fuel cell (SOFC) is formed by placing a layer of perovskite powder between two platens, and sintering the layer while applying pressure to the platens, thereby forming the anisotropic CTE cathode. The perovskite can be lanthanum strontium manganite (LSM).

Anisotropic coefficient of thermal expansion lanthanum strontium manganite for solid oxide fuel cell cathode

A solid oxide fuel cell includes an anode layer, an electrolyte layer over a surface of the anode layer, and a cathode layer over a surface of the electrolyte layer. The cathode layer includes a cathode bulk layer, a porous cathode functional layer at an electrolyte, an intermediate cathode layer partitioning the cathode bulk layer and the porous cathode functional layer, the porous intermediate cathode layer having a porosity greater than that of the cathode bulk layer. The solid oxide fuel cells can be combined to form subassemblies that are bonded together to form solid oxide fuel cell assemblies.

SOFC cathode and method for cofired cells and stacks

A solid oxide fuel cell (SOFC) includes a plurality of subassemblies. Each subassembly includes at least one subcell of a first electrode, a second electrode and an electrolyte between the first and second electrodes. A first bonding layer is at the second electrode and an interconnect layer is at the first bonding layer distal to the electrolyte. A second bonding layer that is compositionally distinct from the first bonding layer is at the interconnect layer, whereby the interconnect partitions the first and second bonding layers. A method of fabricating a fuel cell assembly includes co-firing at least two subassemblies using a third bonding layer that is microstructurally or compositionally distinct from the second bonding layer.

Thermal shock-tolerant solid oxide fuel cell stack

A solid oxide fuel cell electrolyte is fabricated by combining an yttria-stabilized zirconia powder with &#x3b1;-AlOhaving a dparticle size in a range of between about 10 nm and about 200 nm and MnOto form an electrolyte precursor composition, and then sintering the electrolyte precursor composition to thereby form the electrolyte. The &#x3b1;-AlOand MnOcan be present in the electrolyte precursor composition in an amount in a range of between about 0.25 mol % and about 5 mol %. The electrolyte can be a component of a solid oxide fuel cell of the invention.

Co-doped YSZ electrolytes for solid oxide fuel cell stacks

A semiconductor processing component has an outer surface portion comprised of silicon carbide, the outer surface portion having a skin impurity level and a bulk impurity level. The skin impurity level is average impurity level from 0 nm to 100 nm of depth into the outer surface portion, the bulk impurity level is measured at a depth of at least 3 microns into the outer surface portion, and the skin impurity level is not greater than 80% of the bulk impurity level.

Method for treating semiconductor processing components and components formed thereby

A semiconductor processing component includes a substrate and a layer overlying the substrate. The layer has a composition ReAO, wherein Re is Y, La, a Lanthanoid series element, or a combination thereof, A is (SiGe), 0.25&#x2266;y&#x2266;1.2, and 0&#x2266;a&#x2266;1.

Semiconductor processing components and semiconductor processing utilizing same

A high purity ceramic article having a typical pore size of at least about 15 &#x3bc;m and an active impurity concentration of less than about 400 ppm can be prepared by molding ceramic powder, sintering to vaporize any active impurity components, washing to dissolve any remaining active impurity components with an acid solution, and oxidizing to remove any residual active impurity components.

Growing community of inventors

Westford, MA, United States of America

Yeshwanth Narendar