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

Product Information

Our Copper powders are mostly distributed by national or international distributors of metals and chemicals including ChemicalStore.com. Therefore, the anhydrous copper formate used in the present invention is preferably one having a small amount of these compounds other than copper formate. A practical measure of this is that when a sample of anhydrous copper formate in an amount of 10 mg in a nitrogen or hydrogen gas atmosphere at a heating rate of 3 ° C / min. is heated, 90 weight percent or more of the sample are thermally decomposed within the temperature range of 160 to 200 ° C. It is preferred that the above be considered when the anhydrous copper formate is industrially synthesized for use in this invention. and stirring or ultrasonic treatment (indicated by *) was performed for ten minutes. In cases where a washing operation has been repeated, the number of repeated washing operations is shown in the table after 'x' (e.g. 'x9' means 'washed nine times'). Some of the most widely used general purpose high purity copper powders are listed bellow. Specifications are based on a typical analysis. A Cu-25Pb-3.5Sn alloy is used widely for such applications as cam bearings, turbine bearings, pump bushings and high speed thrust washers.

All components of this product are listed in the U.S. Environmental Protection Agency Toxic Substances Control Act Chemical substance Inventory. Anhydrous copper formate produced by any of a variety of methods can be used in the present invention as far as the copper formate to be used satisfies the above requirements. However, anhydrous copper formate prepared by a method using copper carbonate, copper hydroxide or copper oxide as the starting copper compound and reacting this starting copper compound with formic acid or methyl formate is useful as a starting material for the process of the present invention when the process is industrial is performed. To 0,66 kg of cupric oxide powder, 2,4 kg of 16-percent aqueous formic acid solution was added. The resulting mixture was heated to 80 ° C for three hours, and the water was then removed by evaporation at 100 ° C at reduced pressure to concentrate and dry the reaction product to give 1,2 kg of anhydrous copper formate crystals. The degree of thermal decomposition of this anhydrous copper formate was 85%. The crystals thus obtained were dissolved in water to determine the content of water-insoluble components, and the content was found to be 15%. The water-insoluble components were analyzed by X-ray diffractometry and found to have a composition corresponding to an approximately 1: 1 mixture of unreacted cupric oxide and basic copper formate.Self-lubricating porous bronze bearings depend on conduction and convection for heat dissipation during service. The frictional heat developed is proportional to PVµ where P is the pressure on the bearing, V is the surface velocity and µ is the coefficient of friction. Practical limits for safe operation of these bearings are often set at a PV factor of 50-60 ksi (345-414 MPa). These bearings are installed by pressing into rigid reamed or bored housings. Aluminum bronze P/M parts containing from 5% to 11% aluminum are prepared from blends of the elemental powders. Alloys containing from 5% to 9% aluminum are single-phase materials and have excellent ductility. They can be strengthened by cold working. Alloys containing from 9% to 11% are two-phase materials which are less ductile than the alloys of lower aluminum content. However, they can be heat treated to increase their strengths. P501 Dispose of contents/container in accordance with local/regional/national/international regulations. When adding metallic powders to polyester or vinylester resin systems it is important to catalyse the resin prior to adding the metal powder so as to avoid any adverse reaction (rapid oxidisation) of the metal powder by the catalyst.

For low-duty shaft bearings where the static load-carrying capacity is adequate; where lubrication is impossible; and where the only requirement is low cost and avoidance of heating, seizure or squeaking throughout the life of the appliance or machine. In the method of the present invention, an anhydrous copper formate powder as described above is thermally decomposed in the solid phase to produce a fine copper powder. P.W. Taubenblat, W.E. Smith and C.E. Evans, "Production of P/M Parts from Copper Powder," Precision Metal 30(4):41 (1972). A ratio of at least 50% copper powder (by weight) would be required to result in a significantly metallic appearance. Higher ratios, up to the limit of pour-ability, will yield a more impressive metallic appearance and feel.EPA-D: Not classifiable as to human carcinogenicity: inadequate human and animal evidence of carcinogenicity or no data are available. Source: A.K.S. Rowley, E.C.C. Wasser and M.J. Nash, "The Effect of Some Variables on the Structure and Mechanical Properties of Sintered Bronze," Powder Met. Int. 4(2):71 (1971). kg of a 3 percent aqueous formic acid solution were added to 2 kg of basic copper carbonate (= CUCO 2 Cu (OH) 2,4 H 40 O). The resulting mixture was heated to 80 ° C and kept at that temperature for 30 minutes while the mixture was stirred. The water was then removed by evaporation at 80 ° C under reduced pressure to concentrate and dry the reaction product, whereby 1,28 kg of crystals of anhydrous copper formate were obtained. The thermal decomposition properties of this anhydrous copper formate were tested by adding 10 mg of the anhydrous copper formate in a nitrogen or hydrogen gas atmosphere at a heating rate of 3 ° C / min. were heated. As a result, it was found that the proportion of components which had decomposed in the temperature range of 160 to 200 ° C (hereinafter referred to as "thermal decomposition degree") was practically 100%. In the above process, the starting compounds may remain unreacted depending on the reaction conditions, by-products may be formed in addition to the copper formate, or the copper formate may further react to form other compounds. In this way, the resulting copper formate contains such other compounds. For example, since copper formate is remarkably unstable in aqueous solution, the greater the proportion of water and the higher the temperature, the more the formation of water-insoluble products such as basic copper formates is accelerated due to side reactions or subsequent decomposition reactions. Any unreacted starting compounds, such as copper carbonate, copper hydroxide and copper oxide, and the products of side reactions or decomposition reactions, such as basic copper formates, can be converted by reduction into metallic copper, without any substance included in the copper being supplied. However, since the reduction reaction is accompanied by considerable heat generation and thereby water forms, such copper compounds are not suitable for the thermal solid phase decomposition in the method of the present invention, because the use of such compounds requires calorimetric control and other complicated procedures.