摘要:
The present invention relates to a process for producing magnetic particle powder of acicular ferric oxide used for a magnetic recording material comprising (A) reducing acicular goethite particle powder to obtain acicular magnetite particle powder, (B) heating said acicular magnetite particle powder and thereby making the partial pressure of oxygen in said acicular magnetite particle powder reach the equilibrium value and (C) oxidizing said acicular magnetite particle powder to obtain gamma-hematite (maghemite) particle powder, and magnetic particle powder produced thereby.
摘要:
Stabilization treatment of acicular ferromagnetic iron or iron-alloy fine particles against the oxidation thereof comprises the steps of (a) suspending acicular ferromagnetic iron or iron-alloy particles obtained by the reduction of acicular iron oxide which may contain Co or Ni in an aqueous alkaline solution having 0.01 to 18-N of hydroxyl ion concentration at a temperature of 5.degree. to 70.degree. C. while stirring the suspension in a non-oxidative atmosphere therethrough and thereby controlling the dissolution of ferrous ion from the surface of the acicular particles therein, (b) oxidizing the surface of the acicular particles in the resultant suspension by introducing an oxygen containing gas therein at a temperature of 60.degree. to 100.degree. C. to form dense and thin magnetite film on the surface of the acicular particles; and (c) drying the resultant particles in air at a temperature below 100.degree. C.
摘要:
The process for producing acicular magnetic metallic particle powder with improved magnetic properties which include the characteristic steps for producing the acicular particles of metal oxide with homogeneous and dense coats of crystalline silica and to thereby protect the particles from heat-damages during the reduction thereof under high temperatures.
摘要:
The processes for producing iron oxide products from a solution of ferrous salts selected from the group consisting of waste liquid containing ferrous salts and aqueous solution in which ferrous salts obtained from the waste liquid are dissolved, under the acid, wet and high ferrous concentration conditions. More particularly, the processes for purifying said waste liquids comprising the bivalent iron removing steps.
摘要:
Disclosed herein are sphere-like magnetite particles showing an apparent density of from 0.40 to 1.00 g/cm.sup.3 and a high thermo-stability and containing from 0.1 to 5.0 atomic % of Si to Fe, and a process for producing the sphere-like magnetite particles.
摘要翻译:本文公开了球状磁铁矿颗粒,其表观密度为0.40至1.00g / cm 3,并且具有高热稳定性并且含有0.1至5.0原子%的Si与Fe,以及用于制备球形磁铁矿颗粒的方法 。
摘要:
A connector includes first wire-holding portions (3) for holding power-supplying wires (2) in a juxtaposed manner, a second wire-holding portion (6) for alternately holding earth wires (4) and signal-purpose or power-receiving wires (5) for auxiliary equipments in a juxtaposed manner in a direction substantially perpendicular to a longitudinal direction of the wires (2) held by the first wire holding portions (3), a plurality of press-contacting joint terminals (8), each including a second press-contacting terminal (18) for connection to the corresponding signal-purpose or power-receiving wire (5) and a first press-contacting terminal (17) which is connected to the second press-contacting terminal (18), and can be connected to the corresponding wire (2) held by the first wire-holding portions (3), and an earth terminal (9) which can be connected to the earth wires (4) and can be connected to an earth side.
摘要:
An electro-coagulation printer is basically constructed by a rotation drum having a circumferential surface which is electrified in positive potential, a number of electrodes which are selectively electrified in negative potentials, and an ink supply device. The electrodes are aligned to oppositely face with the circumferential surface of the rotation drum with a gap which ranges between thirty and one-hundred microns. The ink supply device is arranged in an incoming side of the rotation drum and supplies liquid ink to be injected onto the circumferential surface of the rotation drum, so that electrification is performed between the electrodes and circumferential surface of the rotation drum with intervention of the liquid ink. Thus, a desired image is formed on the circumferential surface of the rotation drum and is transferred onto a printing material such as a paper. In order to prevent the liquid ink from being stuck to surfaces and peripheral portions of the electrodes, electrolyte containing substantially no coagulating components is supplied to the electrodes. Namely, an ink film thickness regulation roller is provided to regulate the liquid ink to a prescribed thickness (T1) which is smaller than the gap, while a gap of a remaining thickness (T2) is filled with the electrolyte. Thus, electrification is performed in such a manner that the liquid ink having the prescribed thickness is placed on the circumferential surface of the rotation drum, while the electrolyte is placed in contact with the electrodes, wherein the liquid ink and electrolyte are arranged in different phases.
摘要:
In construction of a ski boot having a rearcuff turnably mounted to a shell via pivots and an instep pad for pressing an wearer's foot being pulled by a tensioner on the rearcuff via a wire, the wire extends in engagement with a seat located upwards and rearwards of the pivot, thereby concurrently sufficing two major functional demands for a ski boot.
摘要:
An electro-coagulation printer uses an electrode control unit to drive electrodes which are aligned in proximity to a rotation drum having a conductive ink film on its surface. The electrodes are respectively electrified to partially coagulate the conductive ink film to form ink dots on the surface of the rotation drum, so that the ink dots are transferred onto a paper. Herein, the electrode control unit receives print data from a host device by way of an interface. Gradation data representing gradation values for one line of the electrodes are created based on the print data and are output in a serial manner. The serial gradation data are converted to parallel data corresponding to the gradation values, which are held and controlled in output timing. Based on the gradation values, pulse signals are generated to drive the electrodes respectively.
摘要:
In a printing apparatus for forming a desired image by coagulating a portion of liquid ink in a predetermined space S formed between a circumferential surface of a rotation drum and a plurality of negative electrodes by electrical energizing, and transferring this to a printing object such as paper, to thereby affect printing, there is provided on a rotation input side of the plurality of negative electrodes a discharge port whereby a fluid can be discharged towards the negative electrode surface and the surroundings thereof. Moreover, there is provided a fluid supply device for supplying a fluid (which may be a liquid or a gas) to the discharge port.