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

£9.9
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Copper Powder (Atomized Metal) - Weight: 1kg - By Inoxia

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

RRP: £99
Price: £9.9
£9.9 FREE Shipping

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Description

The Ultrafine Copper Powder is obviously produced from the Copper and every year the production of the copper is less than the needs of all industries around the world. 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.

A ratio of at least 50% copper powder (by weight) would be required to result in a significantly metallic appearance. This unique metal-forming method permits the production of parts with close tolerances and a minimum of scrap. Properties of tin bronze P/M parts are influenced also by such factors as heating rate and sintering time and temperature. Copper P/M products can be strengthened by incorporating finely dispersed particles of oxides such as alumina, titania, beryllia, thoria or yttria in the matrix. 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.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.

The differences in pressing characteristics of premixed and prealloyed powders are indicated in Figure 6. And by producing parts with interconnected pores, the metallurgist can obtain a skeleton that can be impregnated with oils, plastics or even a metal having a lower melting point. Since prealloyed powders have higher yield strengths and work hardening rates than premixed powders, the pressing loads required to achieve a given green density are higher than those required when pressing elemental powders. By mixing finely-ground copper powder with a liquid bonding agent (such as polyester or polyurethane resin) it is possible to create a paste that can be moulded and hardened to create composite castings that mimic pure metal ones without the need for a hot foundry. Pure copper powder is used in the electrical and the electronics industries because of its excellent electrical and thermal conductivities.

and said anhydrous copper formate powder is obtained by dehydrating copper formate hydrate at a temperature of 130 ° C or less and then pulverizing the anhydrous copper formate, or by at least one copper compound selected from the group consisting of copper carbonate, copper hydroxide and copper oxide is reacted with formic acid or methyl formate. The copper powder formed upon decomposition reaches the predetermined temperature at which the decomposition atmosphere is maintained in a short period of time because of the excellent thermal conductivity of copper powder, and the copper powder becomes copper formate vapor (copper (I) formate) at that temperature Formed copper formate, and also formic acid gas, which is formed in the decomposition, and exposed to gases of the decomposition products of formic acid. Higher ratios, up to the limit of pour-ability, will yield a more impressive metallic appearance and feel. To 1,62 kg of copper hydroxide powder was added 4,8 kg of 80-percent aqueous formic acid solution, and this mixture was stirred for one hour. A unique attribute of powder metallurgy is the ability to produce porous products with interconnected porosity.

The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. is heated, 90 weight percent or more of the powder within a temperature range of 160 to 200 ° C are thermally decomposed. This thermal decomposition behavior is preferable from the viewpoint of obtaining a fine copper powder which has higher purity and less tendency to agglomerate. In the present invention, the anhydrous copper formate powder in a solid phase means an anhydrous copper formate powder which is packed in a container such as a can or the like made of a material which is resistant to the heating temperatures and is not attacked by formic acid vapor, an anhydrous copper formate powder applied to a running belt made of such a material, or an anhydrous copper formate powder in a similar state. Tin bronze is probably the most widely used filter material but nickel silver and copper-nickel-tin alloys are also used.

Under the above circumstances, the inventors have made intensive studies to develop a method for producing fine copper powder by simple procedures.

Such an anhydrous copper formate powder can be obtained by dehydrating copper formate hydrate at a temperature of 130 ° C or less, and then pulverizing the dehydrated copper formate by forming crystals of anhydrous copper formate directly from an aqueous solution of copper formate and then pulverizing the crystals, or by directly forming a crystalline anhydrous copper formate powder having a particle size of 850 μm (20 mesh) or finer from an aqueous solution of copper formate. For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'. 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. A copper compound selected from these compounds is mixed with formic acid or methyl formate usually in an aqueous medium, the proportion of the formic acid or methyl formate being not less than the equivalent proportion of the copper compound, the proportion being determined according to the kind of the copper compound. With the exceptions that 0,66 kg of cupric oxide powder and 2,4 kg of 80-percent formic acid solution were used as starting materials and that the starting materials were mixed and stirred at 80 ° C 20 for hours, anhydrous copper formate crystals in an amount of 1,28 kg in same way as in example 1.If the copper-lead alloys do not have sufficient load-carrying capacity, the lead content is reduced, and tin is added to improve the strength. To produce one gram of this powder, more than a quarter of a ton of copper is required, along with a lot more solutions, catalysts and additives. The ability to achieve close control of porosity and pore size is the basis for the use of metal powders as filters. This particular anhydrous copper formate can be easily produced industrially at a low cost from a cheaper copper compound, and in this case, impurities contained in the starting material can be easily reduced.



  • Fruugo ID: 258392218-563234582
  • EAN: 764486781913
  • Sold by: Fruugo

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