摘要:
Gold powders and methods for producing gold powders. The powders preferably have a small particle size, narrow size distribution and a spherical morphology. The method includes forming the particles by a spray pyrolysis technique. The invention also includes novel devices and products formed from the gold powders.
摘要:
The present invention relates to improved metallurgical powder compositions that incorporate solid lubricants, methods for preparing and using the same, and methods of making compacted parts. Ejection properties, such as stripping pressure and sliding pressure, of compacted parts can be improved by using the solid lubricants. The solid lubricants contain functionalized polyalkylene lubricants have the formula: R1—Q—R2 where Q is a linear or branched, polyalkylene containing from about 10 to about 200 carbon atoms, and R1 and R2 are each independently a hydroxyl group, a carboxylic acid group or a metal salt thereof, an amine group, a mono- or di-C1 to C25 alkyl substituted amine group, or an alkylene oxide group having the formula: —[(CH2)qO]nH where q is from about 1 to about 7, n is from about 1 to about 100.
摘要:
The Mn—Zn ferrite of the present invention contains basic components of 44.0 to 50.0 mol % (50.0 mol % is excluded) Fe2O3, 4.0 to 26.5 mol % ZnO and the remainder MnO, and has a real part &egr;′ of complex relative permittivity of 20,000 or less at 1 kHz and 50 or less at 1 MHz, thereby maintaining initial permeability in a wide frequency band, showing a low stray capacitance with a coil provided, and ensuring an excellent impedance in a wide frequency band. And a coil using the Mn—Zn ferrite as a magnetic core is also provided.
摘要翻译:本发明的Mn-Zn铁氧体含有44.0〜50.0摩尔%(除去50.0摩尔%)Fe 2 O 3,4.0〜26.5摩尔%ZnO,其余为MnO的碱性成分,其相对介电常数为 在1kHz下为20,000或更小,在1MHz下为50或更小,从而在宽频带中保持初始磁导率,示出了提供的线圈的低杂散电容,并确保在宽频带中具有优异的阻抗。 并且还提供了使用Mn-Zn铁氧体作为磁芯的线圈。
摘要:
A niobium powder for capacitors, having an average particle size of from 10 to 500 &mgr;m, which is a granulated powder having an oxygen content of 3 to 9% by mass; a sintered body thereof; and a capacitor fabricated from the sintered body as one part electrode, a dielectric material formed on the surface of the sintered body, and another part electrode provided on the dielectric material. A capacitor manufactured from the sintered body of a niobium powder of the present invention is prevented from deterioration in the performance for a long period of time and has high reliability.
摘要:
The invention concerns a composition for warm compaction comprising a composition comprising a water-atomised standard stainless steel powder including, in addition to iron and 10-30% by weight of chromium, optional alloying elements and inevitable impurities, 0.8%-2.0% by weight of a warm compaction lubricant.
摘要:
The present invention relates to a method of making a cemented carbide by mixing powder of WC and possibly other powders forming hard constituents and binder phase and pressing agent, drying, pressing and sintering whereby; the mixing is wet mixing with no change in grain size or grain size distribution of the hard constituent powders; the WC grains are coated with binder metal and deagglomerated prior to the mixing. The sintering is made by microwave sintering at 1325-1410° C. with a holding time of 5-15 min. As a result a cemented carbide with improved properties is obtained.
摘要:
A fine flaky copper powder having an average major axis diameter of 4 to 10 &mgr;m and a flakiness of 2 to 20, has a bulk density of 2 to 4 g/cm3 and a BET specific surface area of 0.4 to 1.5 m2/g; A process for producing the copper powder includes introducing a copper slurry into a medium type agitation mill and flattening the powder.
摘要翻译:平均长径为4〜10μm,片状2〜20的细片状铜粉末的堆积密度为2〜4g / cm 3,BET比表面积为0.4〜1.5μm, 2> / g; 铜粉的制造方法包括将铜浆引入中型搅拌机中并使粉末变平。
摘要:
Process for working up powder coating waste to yield reusable powder coatings by compacting the powder coating waste without complete melting to yield a sintered product, in which process powder coating residues arising during powder coating production are continuously separated, continuously compacted and the compacted product is continuously ground together with fresh material to be ground of the same batch of powder coating without extrusion to yield a powder coating.
摘要:
This invention provides a Mn—Zn ferrite which has a high electrical resistance and can sufficiently satisfy the use in a high frequency region exceeding 1 MHz. This invention further provides a production process of the Mn—Zn ferrite in which mixed powder whose components are adjusted so as to have a basic component composition containing 44.0 to 50.0 mol% Fe2O3, 4.0 to 26.5 mol % ZnO, 0.1 to 8.0 mol % one or two from TiO2 and SnO2 and the remainder consisting of MnO, and further to contain 0.01 to 2.00 mass % one or more of CoO, NiO, and MgO as additive is pressed, then sintered and cooled in the air or in an atmosphere containing some amount of oxygen.
摘要翻译:本发明提供一种具有高电阻并能够充分满足超过1MHz的高频区域的用途的Mn-Zn铁氧体。 本发明还提供了一种Mn-Zn铁氧体的制造方法,其中调整成分为具有含有44.0〜50.0摩尔%的Fe 2 O 3,4.0〜26.5摩尔%的ZnO,0.1〜8.0摩尔%的ZnO的碱性成分组成的混合粉末 或者两个来自TiO 2和SnO 2,剩余部分由MnO组成,并且还含有0.01至2.00质量%的一种或多种CoO,NiO和MgO作为添加剂,然后在空气中或在含有一部分的气氛中烧结和冷却 氧气量。
摘要:
The present invention is a polyol method for making composite particles of two or more immiscible transition metals, where these particles are of nanoscale dimensions, and where the constituent metals are of essentially nanocrystalline morphology. The method of the invention has the steps of (1) dissolving or suspending two or more precursor metal compounds in an alcohol or polyol (diol, triol, etc.) solution, and (2) taking the solution or suspension to a temperature where the metal compound reduces, causing the first and second metals to form nanoscale composites. The term “polyol solution” will be used herein to describe solutions that contain either alcohol or polyol.