Copper Powder (Atomized Metal) - Weight: 1kg - By Inoxia

Product Information

In one method of producing coins, medals and medallions, a mixture of 75Cu-25Ni powders with zinc stearate lubricant is compressed, sintered coined and resintered to produce blanks suitable for striking. These blanks have the advantage over rolled blanks of being softer because they are produced from high purity material. Therefore, they can be coined at relatively low pressures and achieve greater relief depth with decreased die wear.

The crystals of the anhydrous copper formate obtained above were pulverized into a powder having a particle size of 150 μm (100 mesh) or finer, and using 1 kg of the powder, except that the powder was kept at 300 ° C for one hour thermal decomposition in the same manner as in Example 1. In this way, 414 g of a powder which was the product of thermal decomposition was obtained. This powder was a fine copper powder consisting of nearly spherical primary particles uniform in size and having a uniform particle diameter of about 0,4 μm and having a specific surface area of ​​2 m² / g. The agglomerate particle diameter of the powder was measured (on average) after the powder was dispersed in water by the treatment with a mixer, and found to be about 8 μm. Hirschhorn, Introduction to Powder Metallurgy. New York, American Powder Metallurgy Institute, 1969. The conditions of restrictions according to Article 67 and Annex XVII of the Regulation (EC) No 1907/2006 (REACH) for the manufacturing, placing on the market and use must be observed. Each of the copper powders thus obtained was washed in the same manner as shown in Table 3 to obtain a copper powder having a greatly improved purity. The results obtained are shown in Table 3.

The Registry of Toxic Effects of Chemical Substances (RTECS) contains tumorigenic and/or carcinogenic and/or neoplastic data for this substance. Metals such as copper and lead which have very limited solubilities in each other are difficult to alloy by conventional means but copper-lead powder mixtures have excellent cold pressing properties. They can be compacted at pressures as low as 11 ksi (76 MPa) to densities as high as 80% and, after sintering, can be repressed at pressures as low as 22 ksi (152 MPa) to produce essentially nonporous bearings.

The thermal decomposition behavior of these copper compounds was examined by means of a differential thermal balance analysis in which copper hydroxide, basic copper carbonate, anhydrous copper formate and a product of the subsequent decomposition reaction of copper formate, each weighing 10 mg, in an N 2 or H 2 gas atmosphere with a heating rate of 3 ° C / min. were heated. The results obtained on the peak temperatures in the calorimetric changes (endothermic, exothermic or the like changes) and the decomposition products are shown in Table 1. The washing liquids and the washing technique for each copper powder shown in the table 3 are as follows.

Researchers 3D Print Human Tumor From Biomaterials

Accordingly, it is an object of the present invention to provide a method for producing a fine copper powder as described above. Example Comparative example Particle size of the anhydrous copper formate (mesh) µm Conditions of thermal decomposition: - Temperature - Duration (hours) Produced Cu powder - Primary particle ∅ (µm) - Specific surface area (m² / g) - Agglomerate particles ∅ (µm) D.N. lisson, "A Metallurgical Review of Plain Bearings," paper presented at Coppermetal Bearings Symposium, Melbourne, Australia, Oct. 29, 1969.