The effect of the particle shape and structure on the flow ability of electrolytic copper powder II: The experimental verification of the model of the representative powder particle

Abstract

An analysis of the effects of the shape, surface structure and size distribution of particles on the flow ability of the copper powder was performed. It is shown that the most important property of the particles of a powder, regarding the flow ability of the powder, is the surface structure of the particles.

Stability of Crystallizer-Producing Shape-Engineered Crystals

“…The two major properties of crystalline products are their size and shape . The flowability, adhesion characteristics, bulk density, mechanical strength, and bioavailiability (for pharmaceuticals) are some of the important properties of crystalline materials that are affected by the size and shape of the crystals. Although many properties of crystals depend on its shape, traditionally crystallizers have been modeled by taking only the crystal size into account; only recently is a quantitative understanding of crystal shape evolution gaining ground …”

Effects of New Additives (Lanolin) on the Electro-Deposition of Copper Powder

“…The particles of many metal powders are 25 to 200 µm in size (1) . The industrial output of copper powder is greater than that of any other metal powder (2)(3)(4) .This can be attributed to a wide range of using copper and copper a alloys powders in an industrial applications. Pure copper powder is used in the electrical and electronics industries because of its excellent electrical and thermal conductivities.…”

“…Electrolysis is the most economical method; moreover the copper powder obtained is of the highest quality (6) . Electrolytic powder is produced from high purity cathode copper and the powder is consistently more than 99% pure (4,5).…”

“…Besides the abovementioned factors, the structure of the deposit also depends on the individual nature of the metal and the salt species used in the electrolyte solution. Electrolytic metal powder occurs mainly as dendrite electrodeposits (1,4) , which can spontaneously fall off or can be removed from the electrode by tapping or by other similar ways. (Also, the powder has a tendency to form flakes or needles, fibrous or spongy forms, etc., depending on the electrodeposition process parameters and on the nature of the metal).…”

“…of the deposition process (1, 4, 7). If the kinetics of the deposition process is fast powder can be obtained at low driving force, while a much larger driving force is needed for kinetically slow processes (4) .The apparent density, the flowability, and the specific surface are the most important properties of metal powders (2, 3), but in practice the quality of the powder is mostly determined by the apparent density (2).…”