Abstract: The present invention provides a single-phase lithium ferrite based oxide which is suitable as a cathode material for a secondary battery, a process for preparing the oxide, and its uses, the oxide having a layered rock salt-type structure and comprising lithium ferrite (LiFeO2)−Li2-xMO3-y solid solution wherein M is at least one species selected from the group consisting of Mn, Ti and Sn, 0≦x<2, 0≦y≦1 such that the proportion of iron is 0.1≦Fe/(Fe+M)≦0.9.

Abstract: Tin-containing granular magnetic oxide particles comprising spinel-type crystal represented by the formula: Fe3-xSnxO4 wherein x is 0.14 to 0.48, and having a Fe2+ content of 17 to 22% by weight, a lattice constant of 8.41 to 8.49 Å, a magnetization value of 20 to 50 Am2/kg when measured under an applied magnetic field of 79.6 kA/m, and a depth of a groove of not more than 40 &mgr;m at which three or more continuous lines each having a length of not less than 10 mm are developed in a pigment dispersion test using a grind-meter when measured by Hoover's muller method according to JIS K5101 (1991) 9.1. The tin-containing granular magnetic oxide particles of the present invention exhibit a sufficient blackness, a small magnetization value and an excellent dispersibility.

Abstract: A lithium cobalt oxide (LiCoO2) having a layered rock-salt type structure produced at low temperatures by hydrothermally treating at least one water-soluble cobalt salt in an aqueous solution containing a water-soluble lithium salt and an alkali metal hydroxide at 105 to 300° C. in the presence of an oxidizing agent. An inexpensive salt of divalent cobalt is used as a starting material in this process. The lithium cobalt oxide thus obtained is useful as a cathode material for rechargeable lithium batteries.

Abstract: Disclosed is a lithium-iron-manganese complex oxide having a layered rock-salt structure comprising a solid solution formed by dissolving lithium ferrite (LiFeO2) in Li2-xMnO3-y (0≦x≦2, 0≦y≦1) of a layered rock-salt structure in a homogeneous crystalline state in such a way that an iron rate satisfies the relationship of 0.2≦Fe/(Fe+Mn)≦O.75, wherein at least 10% of iron contained in said solid solution is in a tetravalent state. The lithium-iron-manganese complex oxide is useful as cathode materials for a next generation low-priced lithium-ion battery and catalyst materials.

Abstract: The present invention provides a single-phase lithium ferrite based oxide which is suitable as a cathode material for a secondary battery, a process for preparing the oxide, and its uses, the oxide having a layered rock salt-type structure and comprising lithium ferrite (LiFeO2)- Li2-xMO3-y solid solution wherein M is at least one species selected from the group consisting of Mn, Ti and Sn, 0≦×<2, 0 ≦y ≦1 such that the proportion of iron is 0.1≦Fe/(Fe+M)≦0.9.

Abstract: A process for producing a sintered magnet composed of ferrite particles with magnetoplumbite structure exhibiting a large magnetic flux density and a high coercive force, at a relatively low temperature for a short period of time by filling ferrite particles with magnetoplumbite structure produced by a wet-method, in a mold; and supplying an electric current to the ferrite particles with magnetoplumbite structure filled in the mold under a pressure.

Abstract: Tin-containing granular magnetic oxide particles comprising spinel-type crystal represented by the formula:

Abstract: A sintered lithium titaniumphosphate is produced by subjecting the powder of a mixture consisting of a Li source, a Ti source, and a P source to spark plasma sintering under an increased pressure.

Abstract: Hydrothermal treatment of at least one manganese source material, for example, an oxide of manganese, such as Mn2O3, MnO, or MnO2, in an aqueous solution containing at least one water-soluble lithium salt, such as lithium hydroxide, lithium chloride, lithium nitrate, lithium fluoride, or lithium bromide, and an alkaline metal hydroxide, such as potassium hydroxide, at 130 to 300° C. can realize the preparation of a lithium manganese oxide (LiMnO2) having a layered rock-salt structure in a single stage.

Abstract: A high sodium ion conducting inorganic composite solid electrolyte obtained by mixing Na.sub.4 Zr.sub.2 Si.sub.3 O.sub.12 with titanium oxide and sintering the resultant mixture and a method for the production of a high sodium ion conducting inorganic composite solid electrolyte, consisting essentially of the steps of mixing Na.sub.4 Zr.sub.2 Si.sub.3 O.sub.12 with titanium oxide and sintering the resultant mixture.

Abstract: A method of determining the charge and/or discharge capacities of non-aqueous batteries with an operating voltage of about 4 volts, is provided including determining an inverse molar susceptibility value at each of a plurality of different temperatures for a plurality of lithium manganese spinel oxide cathode materials having different respective Mn valencies; plotting the inverse molar susceptibility values against temperatures for each of the plurality of lithium manganese spinel oxide cathode materials; determining values of at least one of two paramagnetic parameters, Weiss temperature and effective magnetic moment, by obtaining the temperature dependence of the above inverse molar susceptibility from a plot derived from the Curie-Weiss law, the Weiss temperature corresponding to a temperature value extrapolated to a zero point of the inverse molar susceptibility and the effective magnetic moment being obtainable from the gradient value of the plot; producing plural rechargeable lithium batteries in which

Abstract: A process for preparing LiFeO.sub.2 having a layered rock salt type structure is characterized in that at least one member selected from the group consisting of water-soluble iron salts, iron hydroxides, iron oxide hydroxides, and metallic iron is subjected to a hydrothermal treatment in an aqueous solution containing lithium hydroxide and at least one of sodium hydroxide and potassium hydroxide at 130.degree. to 300.degree. C.