A method of producing a nickel-containing hydroxide includes a pre-reaction aqueous solution preparation step of preparing a pre-reaction aqueous solution, and a crystallization step of obtaining the nickel-containing hydroxide by adding at least a nickel salt as a metal salt, a neutralizing agent that reacts with the metal salt to form a metal hydroxide, and a complexing agent to the pre-reaction aqueous solution while stirring the pre-reaction aqueous solution, wherein the pre-reaction aqueous solution contains water and the neutralizing agent, and a concentration of dissolved oxygen in the pre-reaction aqueous solution is 0.1 mg/L or less when the crystallization step starts.

The present disclosure relates to a magnetic heating element, an induction heating-type adhesive including the same, and a method of preparing the magnetic heating element. The magnetic heating element according to an embodiment of the present disclosure has a composition with an atomic ratio represented by the following formula, (Ma1-x-yMbxFey)1Fe2-zMczO4, wherein: Ma is cobalt (Co), Mb is one or more of zinc (Zn), Copper (Cu), Manganese (Mn), and Magnesium (Mg), and Mc is one or more of samarium (Sm), yttrium (Y), cerium (Ce), europium (Eu), neodymium (Nd), and dysprosium (Dy); 0.01≤x<0.6, 0≤y≤0.4, x+y<1, 0≤z≤0.5; and the magnetic heating element has a grain size of 40 nm to 500 nm, and powder of the magnetic heating element has a particle size of 100 nm to 30 μm. Accordingly, the adhesive including the magnetic heating element may improve adhesive performance and provide high-speed bonding.

The disclosure herein sets forth processes and compositions for producing carbonated materials comprising calcium carbonates through a mechanochemical process. The present disclosure concerns the production of calcium carbonate by sequestrating CO.sub.2. Certain processes herein include providing alkaline-rich mineral materials that include carbonatable solid wastes such as lime kiln dust, cement kiln dust, and coal combustion residues, and simultaneously fractioning the alkaline-rich mineral materials, while contacting the alkaline-rich mineral materials with a CO.sub.2-containing gas in carbonation reactor at low temperature and ambient pressure. In some embodiments, the alkaline-rich mineral materials are partially carbonated before being used in the processes disclosed herein. After contacting the alkaline-rich mineral materials with a CO.sub.2-containing gas in carbonation reactor at low temperature and ambient pressure, solid calcium carbonate is produced. In aqueous reactors, the solid calcium carbonate is filtered from a solution in which it precipitated, and the remaining solution includes hydroxide as well as alkaline metal ions. The solution filtered from the solid calcium carbonate can be sequentially contacted with a CO.sub.2-containing gas stream to precipitate additional calcium carbonate. The carbonated materials formed from these processes can be used in the form of a slurry, as a moist powder, as a dried powder, as a reactive filler or as a supplementary cementitious material in a mixture that is used to make concrete.

A metal composite hydroxide represented by a general formula (1): Ni.sub.1−x−yCo.sub.xMn.sub.yM.sub.z(OH).sub.2+a, in which [(D90−D10)/MV] is 0.80 or more, the metal composite hydroxide contains a first particle having a core portion inside the particle and a shell portion formed around the core portion and a second particle having a uniform composition inside the particle, and the second particle has a similar composition to the shell portion and accounts for 60% or more of a total number of particles of 4 μm or less in the metal composite hydroxide.

A boron nitride particle having a bent shape. A resin composition containing the boron nitride particle and a resin. A method for producing a resin composition including a step of preparing the boron nitride particle and a step of mixing the boron nitride particle with a resin.

The present disclosure broadly relates to a process for recovering magnesium as magnesium oxide and fibrous amorphous silica from serpentinite feedstocks. More specifically, but not exclusively, the present disclosure relates to metallurgical and chemical processes for recovering magnesium oxide and fibrous amorphous silica from serpentinite feedstocks. The process broadly comprises applying a sufficient amount of shear deformation force to the serpentine feedstocks to produce a particulate material of reduced size; subjecting the particulate material to magnetic separation to produce a primary magnetic separation product and iron-reduced tailings; and digesting the iron-reduced tailings into nitric acid, producing a magnesium-rich pregnant solution and insoluble solids. The process further comprises adjusting the pH of the pregnant solution to values ranging from about 5.0 to about 7.0.

The present invention relates to a method of post-synthetic downsizing zeolite-type crystals and/or agglomerates thereof to nanosized particles, and in particular a heating-free and chemical-free method. The present invention also relates to nanosized particles of zeolite-type material capable of being obtained by the method of the invention and to the use of such particles as a catalyst or catalyst support for heterogeneous catalyst, or as molecular sieve, or as a cation exchanger.

A method for producing a nickel cobalt complex hydroxide includes first crystallization of supplying a solution containing Ni, Co and Mn, a complex ion forming agent and a basic solution separately and simultaneously to one reaction vessel to obtain nickel cobalt complex hydroxide particles, and a second crystallization of, after the first crystallization, further supplying a solution containing nickel, cobalt, and manganese, a solution of a complex ion forming agent, a basic solution, and a solution containing said element M separately and simultaneously to the reaction vessel to crystallize a complex hydroxide particles containing nickel, cobalt, manganese and said element M on the nickel cobalt complex hydroxide particles crystallizing a complex hydroxide particles comprising Ni, Co, Mn and the element M on the nickel cobalt complex hydroxide particles.

The present invention provides a porous carbon fiber which has an excellent permeation amount and excellent pressure resistance, which is prevented from the occurrence of detachment or cracking at an interface, and which can exhibit excellent properties needed for use as a support for a fluid separation membrane. The present invention is a porous carbon fiber having a bicontinuous porous structure, wherein

the average value R.sub.ave of the R value of the outer surface and the R value of the inside is 1.0 or more and 1.8 or less,

the absolute value ΔR of the difference between the R value of the outer surface and the R value of the inside is 0.05 or less, and

R value is a carbonization progression degree calculated from a Raman spectrum in accordance with the following formula:

R value=(intensity of scattering spectrum at 1360 cm.sup.−1)/(intensity of scattering spectrum at 1600 cm.sup.−1).

The present invention relates to anisotropic nanoparticles containing semiconductor compounds of group III and group V elements and a manufacturing method therefor and, more specifically, to anisotropic nanoparticles and a manufacturing method therefor, wherein the anisotropic nanoparticles have an irregular shape, such as a branched structure, a hyper-branched/dendrimer structure, or an aggregated structure with an irregular needle-shaped surface, in which two or more anisotropic shaped unit structures containing semiconductor compounds of group III and group V elements are combined.