摘要:
SmCo-based alloy nanoparticles composed mainly of a SmCo-based alloy containing Sm and Co as constituent elements, wherein the content of metal elements other than Sm and Co is 0.05-20 wt % with respect to the SmCo-based alloy.
摘要:
The invention provides weather-resistant SmCo-based magnetic fine particles and a magnetic recording medium with both weather resistance and high recording density. The SmCo-based magnetic fine particles of the invention include SmCo-based nanoparticles and a hydrophobic polymer covering at least part of the surfaces of the SmCo-based nanoparticles. The magnetic recording medium of the invention also has a magnetic layer comprising at least SmCo-based magnetic fine particles and a hydrophobic binder, wherein the SmCo-based magnetic fine particles include SmCo-based nanoparticles and a hydrophobic polymer covering at least part of the SmCo-based nanoparticle surfaces.
摘要:
A method for manufacturing ferrite powder comprises a step (a) of causing a precursor, obtained by a liquid-phase reaction method, to pass through a sieve with openings of 2 mm or less, and a step (b) of causing free fall, through the interior of a furnace tube heated to the range 750 to 1250° C. by a heater, of the precursor which has passed through the sieve. In the process of causing free fall through the interior of the furnace tube heated by the heater, ferrite powder, which is a single phase of hexagonal ferrite, is obtained by heating the precursor to a prescribed temperature and holding the precursor at the prescribed temperature.
摘要:
The invention provides a process for production of an oxide fine particle powder including a heating step in which a dry powder of a metal complex gel is heat treated to obtain an oxide fine particle powder, wherein the heating step is carried out in two stages with different oxygen concentrations, or at least part of the heating step is carried out in a water vapor-containing atmosphere.
摘要:
The invention provides a magnetic recording medium with both weather resistance and high recording density. The magnetic recording medium of the invention has a magnetic layer comprising at least SmCo-based magnetic fine particles and a hydrophobic binder, wherein the SmCo-based magnetic fine particles include a core composed of SmCo-based nanoparticles and a hydrophilic polymer covering at least a portion of the surface of the core.
摘要:
A method for manufacturing ferrite powder comprises a step (a) of causing a precursor, obtained by a liquid-phase reaction method, to pass through a sieve with openings of 2 mm or less, and a step (b) of causing free fall, through the interior of a furnace tube heated to the range 750 to 1250° C. by a heater, of the precursor which has passed through the sieve. In the process of causing free fall through the interior of the furnace tube heated by the heater, ferrite powder, which is a single phase of hexagonal ferrite, is obtained by heating the precursor to a prescribed temperature and holding the precursor at the prescribed temperature.
摘要:
A refrigerator cabinet basically comprises the body of cabinet, an outer box, an inner box and a heat insulating layer filled in a space formed between the boxes, characterized in that the outer box comprises a top wall and both side walls formed by bending one steel sheet previously coated with paint and further flanges reinforced by a reinforcing member without calking and rivetting, the reinforcing member being engaged with and supported by the groove formed in the flange. Since the reinforcing member roughly L-shaped can be installed by inserting work thereof, it offers excellent workability. In addition, because the reinforcing member is arranged tightly along the inside surface of the groove, it will not interfere with the operation of inserting the high temperature cooling medium pipe of the refrigerating cycle into groove and offer excellent operability.
摘要:
First, a ferrous iron-containing suspension solution is obtained by mixing an aqueous ferrous salt solution and an aqueous alkali solution containing one or two of an alkali carbonate and an alkali hydroxide. Then, an iron oxyhydroxide particle precursor is obtained by blowing an oxygen-containing gas having an oxygen component proportion of 0.5 to 0.8 into the suspension solution thus obtained to oxidize the ferrous iron in the suspension solution at an oxidation rate of 30 to 65% while the suspension solution is being controlled to fall in a temperature range of −5° C. or higher and lower than 10° C. Thereafter, the iron oxyhydroxide particles 2 are produced from the iron oxyhydroxide particle precursor by blowing an oxygen-containing gas into the suspension solution containing the iron oxyhydroxide particle precursor while the suspension solution is being controlled to fall in a temperature range of 20° C. or higher and lower than 45° C.
摘要:
When a potassium-containing substance is formed in to a film using an organic potassium complex as a potassium source by the CVD method, it is prevented that the film formation rate is changed with the lapse of time, and the potassium content in the film thus formed is changed.As a potassium source for vaporization used for depositing the potassium-containing substance on a substrate by the CVD method, a .beta.-diketone complex of potassium that has been melted by heating to a temperature higher than its melting point and then cooled to be solidified is used.
摘要:
There is disclosed a long image sensor composed of plural linear image sensors arranged in staggered manner. The plural sensors are independently controlled in timing, thus achieving a larger freedom in the arrangement in the main and sub scanning directions.