Abstract: A liquid dispersion of metal nanoparticles for solder paste comprises metal nanoparticles made of an alloy and a reducing dispersion medium, wherein the metal nanoparticles have an average particle diameter of 1.0 to 200 nm, the metal nanoparticles have a sintering initiation temperature of less than 50° C., and the liquid dispersion comprises substantially no surfactant or surface modifier.

Abstract: A solid electrolyte comprises a ramsdellite-type crystal structure and has low activation energy of lithium ions and good lithium ion conductivity. The solid electrolyte is represented by the general formula Li4x?2a?3b?c?2dSn4?x?c?dM(II)aM(III)bM(V)cM(VI)dO8 [wherein M(II) is a divalent cation, M(III) is a trivalent cation, M(V) is a pentavalent cation, and M(VI) is a hexavalent cation, 0?x?1.33], wherein in the general formula, 0<a+b+c+d, 0?a+b?x, 0?c+d<0.9, and 3x?a?2b?c?2d?2. The all-solid-state battery includes the solid electrolyte in at least one layer of the positive electrode layer, negative electrode layer, and solid electrolyte layer. The method of making the solid electrolyte includes a step of preparing a mixed powder as a raw material and heating with microwave irradiation.

Abstract: There is provided a producing method of metal fine particles or metal oxide fine particles for producing metal fine particles or metal oxide fine particles by atomizing raw materials by performing processes including an oxidizing process and a reducing process to the raw materials composed of metal or a metal compound.

Abstract: There is provided a producing method of metal fine particles or metal oxide fine particles for producing metal fine particles or metal oxide fine particles by atomizing raw materials by performing processes including an oxidizing process and a reducing process to the raw materials composed of metal or a metal compound.

Abstract: Metal coating is performed by dispersing powders of an inorganic compound in a liquid containing an organic solvent and irradiating vibration or applying heat in a state in which a substrate is immersed in the liquid to form a metallic film on the substrate. By this, provided are a novel method which can uniformly coat the metallic film on various types of arbitrary substrates with a thickness on the order of from several nanometers to several thousand nanometers by a simple means without requiring a need for a means having such a multiple of restrictions as in the vacuum system, without caring about generation of a noxious gas or the like, and free from any restriction on a heating temperature or a selection of a material, and a material coated with a metal by this method.

Abstract: A fuel assembly comprises a plurality of fuel rods bundled in grid pattern, a part of the fuel rods containing gadolinium as a burnable poison. At least one of the fuel rod having gadolinium contains gadolinium enriched in at least one kind of isotope of odd mass number more than an isotopic abundance of natural gadolinium. In the enriched gadolinium, a ratio of a content of Gd-155 to that of Gd-157 is 0.1 or less. An average concentration (wt %) G0 of enriched gadolinia is, with M denoting the number of month under rated power operation per one cycle of an equilibrium core, P power density of a nuclear reactor (kw/l unit) and W a sum of isotopic composition, is set in the range shown by the following expression. G0<0.25·P·M/W. Thereby, in the fuel assembly, residual reactivity of a burnable poison at a cycle end can be decreased and thermal performance can be improved.