In an aspect, a multiphase ferrite comprises a Co.sub.2W phase that is optionally doped with Ru; a CFO phase having the formula Me.sub.r“Co.sub.1−rFe.sub.2+zO.sub.4, wherein Me” is at least one of Ni, Zn, or Mg, r is 0 to 0.5, and z is −0.5 to 6 0.5; and a CoRu-BaM phase having the formula BaCo.sub.x+yRu.sub.yFe.sub.12−(2/3)x−2yO.sub.19, wherein x is 0 to 2, y is 0.01 to 2; and the Ba can be partially replaced by at least one of Sr or Ca. In another aspect, a composite can comprise a polymer and the multiphase ferrite. In yet another aspect, a method of making a multiphase ferrite can comprise mixing and grinding a CoRu-BaM phase ferrite and a CFO phase ferrite to form a mixture; and sintering the mixture in an oxygen atmosphere to form the multiphase ferrite.

An object is to provide a plate shaped ferrite particle for a pigment, having both of electromagnetic wave shielding ability and designability, a resin molded material containing the plate shaped ferrite particle a pigment, and an electromagnetic wave shield housing for storing an electronic circuit manufactured by using the resin molded material. To achieve the object, the plate shaped ferrite particles for a pigment having a metallic luster, a resin molded material containing the plate shaped ferrite particles for a pigment, an electromagnetic wave shield housing for storing an electronic circuit manufactured by using the resin molded material are employed.

Disclosed herein are doped perovskite oxides. The doped perovskite oxides may be used as a cathode material in an electrochemical cell to electrochemically generate ammonia from N.sub.2. The doped perovskite oxides may be combined with nitride compounds, for instance iron nitride, to further increase the efficiency of the ammonia production.

Methods and apparatus for producing a magnetic nanoparticle suitable for additive manufacturing techniques includes providing a solution having a plurality of metallic precursors to produce magnetic nanoparticles, a coordinating solvent, and a chelating agent. The solution is mixed and heated to grow nanoparticles wherein magnetic nanoparticles are formed. The solution is then cooled and a magnetic field is applied to the solution wherein ferrite nanoparticles are at least partially separated by size.

Provided is a method for producing hematite for ironmaking, capable of using a conventional Ca-based neutralizing agent and a base rock-derived neutralizing agent other than the Ca-based neutralizing agent. The method is performed by a process of adding a mineral acid and an oxidizing agent to an ore containing iron and a valuable metal and then leaching the valuable metal under high temperature and pressure, and includes (1) a high-pressure acid leaching step, (2) a preliminary neutralization step, (3) a first solid-liquid separation step, (4) a neutralization step, (5) a second neutralization step, (6) a third solid-liquid separation step, (7) a step of adding part of the Fe-enriched slurry as a seed crystal in the neutralization step (4), and (8) a second solid-liquid separation step.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material expressed by the general formula M1.sub.aM2.sub.2-aM3.sub.bNb.sub.34-bO.sub.87-c-dQ.sub.d.

Novel devices for synthesizing ferrate and uses thereof are described. One aspect of the invention relates to devices and systems for synthesizing ferrate at a site proximal to the site of use.

Provided is an electrochemical element having excellent load characteristics and charge-discharge cycle characteristics, an electrode active material that can constitute the electrochemical element, a method for manufacturing the electrode active material, an electrode material, an electrode, and a movable body including the electrochemical element. The electrode active material for an electrochemical element according to the present invention includes an oxide that has a monoclinic crystal structure and satisfies the following general formula (1): A.sub.yM.sup.1.sub.αAl.sub.x−αNb.sub.12−x−zM.sup.2.sub.zO.sub.29−δ (1). In the general formula (1), A is at least one element selected from Li and Na, M1 is at least one element selected from the group consisting of Fe, Mn, Zn Cu, Ag, Mg Ca, Sr, Ba, Co, Eu, Y, Bi, La, Ce, Nd, Sm, and Gd, M2 is specific element, awl x, y, z, δ, and α satisfy 0<x≤1.1, 0≤y≤24, 0≤z≤2, −1≤δ≤2, and 0<α≤0.4x.

Zero-Rare Earth Metal (ZREM) and Zero-platinum group metals (ZPGM) compositions of varied binary spinel oxides are disclosed as oxygen storage material (OSM) to be used within TWC systems. The ZREM-ZPGM OSM systems comprise binary non-Cu spinel oxides of Co—Fe, Fe—Mn, Co—Mn, or Mn—Fe. The oxygen storage capacity (OSC) property associated with the non-Cu ZREM-ZPGM OSM systems is determined employing isothermal OSC oscillating condition testing. Further, the OSC test results compare the OSC properties of a ZREM-ZPGM reference OSM system including a Cu—Mn binary spinel oxide and PGM reference catalysts including Ce-based OSMs. The non-Cu spinel oxides ZREM-ZPGM OSM systems exhibit significantly improved OSC properties, which are greater than the OSC property of the Ce-based OSM PGM reference systems.

An object of the present invention is to provide a magnetic powder having a narrow particle size distribution of epsilon-type iron oxide particles, and another object is to provide magnetic powder suitable for magnetic recording medium by improving particle size distribution, and provide epsilon-type iron oxide magnetic particles and related technologies in which a number average particle diameter of major diameters (D.sub.50) is 10 to 20 nm, a 90% cumulative particle diameter (D.sub.90) is 30 nm or less, and a geometric standard deviation (σ.sub.g) of major diameters is 1.45 or less, which are obtained by TEM observation.