摘要:
The present invention relates to spindle-shaped goethite particles having an average major axial diameter of 0.05 to 0.18 nullm, spindle-shaped hematite particles having an average major axial diameter of 0.05 to 0.17 nullm, spindle-shaped magnetic metal particles containing iron as a main component, which exhibit an adequate coercive force, good dispersibility, good oxidation stability and excellent coercive force distribution notwithstanding the average major axial diameter thereof is as small as 0.05 to 0.15 nullm, and processes for producing the respective particles. Especially, the spindle-shaped magnetic metal particles containing iron as a main component, have an average major axial diameter of 0.05 to 0.15 nullm, an aspect ratio of from 5:1 to 9:1, a size distribution (standard deviation/average major axial diameter) of not more than 0.30, a crystallite size D110 of 130 to 160 null, a Co content of from 0.5 to less than 6 atm % based on whole Fe, an Al content of from more than 10 to less than 20 atm % based on whole Fe, a rare earth element content of from 1.5 to 5 atm % based on whole Fe, an atomic ratio of Al to Co of from more than 2 to 4, a coercive force of 111.4 to 143.2 kA/m, an oxidation stability of saturation magnetization (nullnulls) of not more than 10%, and an ignition temperature of not less than 130null C.
摘要:
Spindle-shaped goethite particles of the present invention uniformly contain cobalt of 1 to 20 atm %, calculated as Co, based on whole Fe and aluminum of 1 to 15 atm %, calculated as Al, based on whole Fe, and have an X-ray crystallite size ratio (D020:D110) of not less than 1.0:1 and less than 2.0:1, an average major axial diameter of 0.05 to 0.20 nullm, an average minor axial diameter of 0.010 to 0.020 nullm and an average aspect ratio (average major axial diameter:average minor axial diameter) of 4:1 to 10:1. Such spindle-shaped goethite particles are suitable as a starting material of spindle-shaped magnetic iron-based alloy particles which have a large saturation magnetization, an excellent oxidation stability, a high coercive force and a good dispersibility in binder resin, and which are excellent in sheet squareness (Br/Bm) due to the good dispersibility in binder resin.
摘要:
The present invention relates to a process for the production of an iron oxide yellow by a) adding FeSO4 or FeCl2 with an Fe(III) content of 0.0 to 4.0 mol % Fe(III) and a Mn content of up to 0.7 wt. %, based on the Fe content, to a solution or suspension of an alkaline component that has been heated to a temperature of between 42 and 75null C., and b) oxidizing the suspension formed with an oxidizing agent until all iron(II) has been converted into iron(III) as null-FeOOH, whereby the oxidizing agent is added at a rate such that the oxidation time is between 120 and 600 minutes and the reaction temperature during the entire oxidation time is at least at the temperature at which precipitation occurred.
摘要:
Calcium-iron oxide composite particles of the present invention have a BET specific surface area of 1 to 100 m2/g and containing iron atom in an amount of 1 to 50 moles based on 100 moles of calcium atom, the iron atom of not less than 50% based on the total amount of iron atom contained in said calcium-iron oxide composite particles being bonded with calcium atom for forming a calcium-iron ferrite phase. A hydrogen chloride-scavenger comprising the calcium-iron oxide composite particles, is capable of effectively capturing harmful hydrogen chloride generated by thermal decomposition or combustion of chorine-containing resin molded products upon fire or incineration thereof, and fixing the hydrogen chloride as stable calcium chloride or the like.
摘要:
An iron oxide based host material capable of intercalating lithium ions includes nanostructured phases composed of at least substantially amorphous nanometer sized particles, and is applicable for use in the cathode electrode of a lithium rechargeable battery.
摘要:
A lithium ion secondary battery having high energy density and of excellent safety, and a cathode active material used therefor are provided. The cathode active material is a Li-containing composite oxide comprising a plurality of transition metal elements selected from Cr, Mn, Fe, Co, Ni and Cu, in which the composition of the transition metal elements is in a range not inclined to particular transition metal elements. The composite oxide having a crystal structure in which the range of an angle null formed between a axis and b axis of the crystallographic structure is controlled as: 90null
摘要:
Iron oxyhydroxide materials possessing short-range-order structure and nanostructured morphology capable of intercalating lithium ions and being used as electrodes for electrochemical energy devices including rechargeable lithium batteries, and synthesis method thereof.
摘要:
Because of the composition represented by General Formula: Li1nullxnullnullNi(1nullxnullynullnull)/2Mn(1nullxnullynullnull)/2MyO2 (where 0nullxnull0.05, null0.05nullxnullnullnull0.05, 0nullynull0.4; null0.1nullnullnull0.1 (when 0nullynull0.2) or null0.24nullnullnull0.24 (when 0.2nullynull0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.
摘要翻译:由于通式为Li1 + x +αNi(1-x-y + delta)/ 2Mn(1-xy-delta)/ 2MyO2(其中0 <= x <= 0.05,0.05 <= x + α<= 0.05,0 <= y <= 0.4; -0.1 <=Δ= 0.1(当0≤y≤0.2)或-0.24 <=Δ= 0.24(当0.2≤y≤0.4时) ; M是选自Ti,Cr,Fe,Co,Cu,Zn,Al,Ge和Sn中的至少一种元素),层状晶体结构的高稳定性的高密度含锂复合氧化物 并且可以提供优异的充电/放电可逆性,并且通过使用这种用于正极的氧化物来实现耐久性优异的高容量非水二次电池。
摘要:
A crystal which can be employed as the active material of a lithium-based battery has an empirical formula of Lix1A2Ni1nullynullzCoyBzOa, wherein nullx1null is greater than about 0.1 and equal to or less than about 1.3, nullx2,null nullynull and nullznull each is greater than about 0.0 and equal to or less than about 0.2, nullanull is greater than about 1.5 and less than about 2.1, nullAnull is at least one element selected from the group consisting of barium, magnesium, calcium and strontium and nullBnull is at least one element selected from the group consisting of boron, aluminum, gallium, manganese, titanium, vanadium and zirconium. A method includes combining lithium, nickel, cobalt and at least one element nullAnull selected from the group consisting of barium, magnesium, calcium and strontium, has at least one element nullBnull selected from the group consisting of boron, aluminum, gallium, manganese, titanium, vanadium and zirconium, in the presence of oxygen, wherein the combined components have the relative ratio of Lix1:Ax2:Ni1nullynullz:Coy:Bz, wherein nullx1,null nullx2,null nullynull and nullznull have the values given for the empirical formula shown above.
摘要:
The positive active material for a secondary battery of the present invention is null-FeOOH containing at least one element selected from the group consisting of B, P, S, Li, Na, K, Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Zr, Pb and Sn which shows a diffraction peak from the (110) plane having a half width Y satisfying 0.3null