Abstract: A composite body includes a substrate containing Cr; and a first composite oxide layer disposed on at least a part of a surface of the substrate, the first composite oxide layer having a spinel type crystal structure, a first largest content and a second largest content among constituent elements excluding oxygen of the first composite oxide layer being Zn and Al in random order. Accordingly, the composite body can suppress diffusion of Cr from the substrate containing Cr to the first composite oxide layer, and has improved long-term reliability. A collector member and a gas tank, each of which is formed of the composite body, can have improved long-term reliability. A fuel cell device having excellent long-term reliability can be obtained using the collector member and the gas tank.

Abstract: A heat-resistant alloy capable of effectively suppressing diffusion of Cr, as well as an alloy member for a fuel cell, a fuel cell stack device, a fuel cell module and a fuel cell device are provided. A heat-resistant alloy includes a Cr-containing alloy, and a Cr-diffusion suppression layer located on at least a part of a surface of the Cr-containing alloy, the Cr-diffusion suppression layer being made by laminating a first layer that contains a Zn-containing oxide and a second layer that does not contain ZnO but contains an (La, Sr)MnO3-based perovskite oxide in that order, so that it is possible to effectively suppress diffusion of Cr. By using the heat-resistant alloy for an alloy member for a fuel cell, a fuel cell stack device, a fuel cell module and a fuel cell device each having improved reliability can be obtained.

Abstract: A fuel cell includes a solid electrolyte layer containing Zr; an intermediate layer containing CeO2 solid solution having a rare-earth element excluding Ce; an air electrode layer containing Sr, the intermediate layer and the air electrode layer being stacked in this order on one surface of the solid electrolyte layer; and a fuel electrode layer on another surface of the solid electrolyte layer which is opposite to the one surface. A value obtained by dividing a content of the rare-earth element excluding Ce by a content of Zr is equal to or less than 0.05 at a site of the solid electrolyte layer, the site being 1 ?m away from an interface between the solid electrolyte layer and the intermediate layer.

Abstract: A fuel cell capable of suppressing deformation resulting from reduction treatment, a fuel cell device, a fuel cell module, and a fuel cell apparatus are provided, A fuel cell includes a solid electrolyte layer, a fuel electrode layer disposed on the solid electrolyte layer, and an interconnector and an adjustment layer which are disposed on the fuel electrode layer, the interconnector expanding in a reduction atmosphere and the adjustment layer shrinking in a reduction atmosphere, or the interconnector shrinking in a reduction atmosphere and the adjustment layer expanding in a reduction atmosphere. Accordingly, a fuel cell capable of suppressing deformation resulting from reduction treatment can be provided.

Abstract: A fuel cell includes a solid electrolyte layer containing Zr; an intermediate layer containing CeO2 solid solution having a rare-earth element excluding Ce; an air electrode layer containing Sr, the intermediate layer and the air electrode layer being stacked in this order on one surface of the solid electrolyte layer; and a fuel electrode layer on another surface of the solid electrolyte layer which is opposite to the one surface. A value obtained by dividing a content of the rare-earth element excluding Ce by a content of Zr is equal to or less than 0.05 at a site of the solid electrolyte layer, the site being 1 ?m away from an interface between the solid electrolyte layer and the intermediate layer.

Abstract: A heat-resistant alloy capable of effectively suppressing diffusion of Cr, as well as an alloy member for a fuel cell, a fuel cell stack device, a fuel cell module and a fuel cell device are provided. A heat-resistant alloy includes a Cr-containing alloy, and a Cr-diffusion suppression layer located on at least a part of a surface of the Cr-containing alloy, the Cr-diffusion suppression layer being made by laminating a first layer that contains a Zn-containing oxide and a second layer that does not contain ZnO but contains an (La, Sr)MnO3-based perovskite oxide in that order, so that it is possible to effectively suppress diffusion of Cr. By using the heat-resistant alloy for an alloy member for a fuel cell, a fuel cell stack device, a fuel cell module and a fuel cell device each having improved reliability can be obtained.

Abstract: p-channel MOS transistors are turned on alternatively when a positive phase signal and an opposite phase signal each generated from a first voltage signal. Moreover, n-channel MOS transistors are turned on alternatively when a positive phase signal and an opposite phase signal each generated from a second voltage signal. When being turned on, the p-channel MOS transistors supply current to transmission lines, respectively. When being turned on, the n-channel MOS transistors discharge current supplied from the transmission lines to a ground. A current to voltage conversion circuit converts current passing through the transmission lines into a voltage signal. Another current to voltage conversion circuit converts current passing through another transmission lines into a voltage signal.

Abstract: p-channel MOS transistors are turned on alternatively when a positive phase signal and an opposite phase signal each generated from a first voltage signal. Moreover, n-channel MOS transistors are turned on alternatively when a positive phase signal and an opposite phase signal each generated from a second voltage signal. When being turned on, the p-channel MOS transistors supply current to transmission lines, respectively. When being turned on, the n-channel MOS transistors discharge current supplied from the transmission lines to a ground. A current/voltage conversion circuit converts current passing through the transmission lines into a voltage signal. Another current/voltage conversion circuit converts current passing through another transmission lines into a voltage signal.