摘要:
Provided is an arsenic-containing solid comprising 100 parts by mass of a scorodite-type iron-arsenic compound and at least 1 part by mass of an iron oxide compound added thereto, in which the scorodite-type iron-arsenic compound is produced by adding an oxidizing agent to an aqueous acidic solution that contains a 5-valent arsenic (V) ion and a 2-valent iron (II) ion, then promoting the precipitation of an iron-arsenic compound with stirring the liquid, and finishing the precipitation thereof within a range where the pH of the liquid is at most 1.2. The iron oxide compound includes goethite, hematite and their mixture, preferably having a BET specific surface area of at least 3 m2/g, more preferably at least 20 m2/g.
摘要:
Magnetic nanostructures comprised of an assembly of magnetic nanorods held together by dipole forces in a dendritic pattern and their method of manufacture. The dendritic magnetic nanostructures are prepared at room temperature by applying a magnetic field to a reverse micelle system wherein at least one salt of a magnetic metal is being precipitated within the core of the reverse micelle.
摘要:
A process for producing an anisotropic magnetic material includes: preparing a feebly magnetic material capable of transforming into a magnetic material by a prescribed reaction, orienting the feebly magnetic material by imparting an external field to the feebly magnetic material, and transforming the oriented feebly magnetic material to a magnetic substance by the prescribed reaction.
摘要:
The invention relates to nanoparticulate preparations containing at least one mixed metal oxide in the form of supramagnetic, nanoscale particles, methods for heating such a preparation, and methods for producing and dissolving adhesive compounds of the basis of said preparations.
摘要:
The invention relates to nanoparticulate preparations containing at least one mixed metal oxide in the form of supramagnetic, nanoscale particles, methods for heating such a preparation, and methods for producing and dissolving adhesive compounds on the basis of said preparations.
摘要:
The present invention provides a ferrite magnet material comprising, as a main phase, a ferrite having a hexagonal structure, the main phase containing A, La, R, Fe and Co, wherein A is at least one element selected from Sr, Ba and Pb, R is Pr and/or Nd, and the proportions of the total metal elements A, La, R, Fe and Co in the main phase are respectively A: 1 to 13 atomic %, La: 0.003 to 10 atomic %, R: 0 to 10 atomic % (excluding 0) Fe: 80 to 95 atomic % and Co: 0.05 to 5 atomic % based on the total amounts of metal elements. The residual magnetic flux density Br and coercive force HcJ can be improved without increasing the content of Co by incorporating Pr and/or Nd along with La and Co in the ferrite magnet material.
摘要:
A hexagonal ferrite magnetic powder having an average tabular diameter of from 15 to 28 nm, a coercive force (Hc) of from 2,000 to 5,000 Oe (from 160 to 400 kA/m), a switching field distribution (SFD) of from 0.3 to 0.7 and a D70/D50 of from 1.05 to 1.25. This magnetic powder can be obtained by melting and quenching starting materials to obtain an amorphous product, and thermally treating the product, which comprises increasing a temperature at a rate of 300 to 500° C./hr in a temperature range of 550 to 600° C. in the thermal treatment before the temperature reaches the thermally treating temperature.
摘要翻译:平均片状直径为15〜28nm,矫顽力(Hc)为2,000〜5,000Oe(160〜400kA / m)的六角铁氧体磁性粉末,切换场分布(SFD)为0.3〜 0.7,D 70 / D 50为1.05〜1.25。 这种磁性粉末可以通过熔融和淬火原料获得以获得无定形产物,并对产物进行热处理,其包括在550至600℃的温度范围内以300至500℃/小时的速率升高温度 C.在温度达到热处理温度之前进行热处理。
摘要:
A magnetic ferrite operating well in the GHz zone, and a magnetic device of superior high frequency characteristics which uses the magnetic ferrite for its magnetic core.The magnetic ferrite includes iron oxide, cobalt oxide and zinc oxide as the main components and at least one item selected from among the group consisting of titanium, tantalum, indium, zirconium, lithium, tin and vanadium as the side component.
摘要:
A pearlescent pigment comprises (a) synthetic mica substrate, (b) calcined ferrite coating on the substrate, and (c) an outer layer or treatment wherein said outer layer or treatment was added to the calcined ferrite coated synthetic mica in water. The pearlescent pigment may be used in exterior applications such as automotive paint systems.
摘要:
A method of which includes the steps of introducing an acidic solution containing (V), copper, ferric iron and ferrous iron into a first tank of a series of continuously stirred tank reactors and, in the first tank, adding air to the solution; heating the solution to an elevated temperature; recycling a portion of selectively precipitated ferric arsenate compounds to the said first tank; and seeding the solution with ferric arsenate compounds.