From Minerals to Nanoparticles

Baláž, Peter

doi:10.1007/978-3-540-74855-7_4

Cited by 5 publications

(15 citation statements)

References 108 publications

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“…The MCA is a simple method to apply, especially when done by milling. The entire process is characterized by small energy requirements, low processing temperatures, and thus reduced costs, and increased environmental friendliness, (Baláž, 2000(Baláž, , 2008Boldyrev 2006;Rescic et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…did the first documented description of a process, which could relate to the MCA, (Takacs 2000). In 1820, Michael Faraday reduced AgCl to Ag with a pestle and a mortar, which also simulated to a certain extent the MCA process, (Fox 1975;Baláž 2008;James et al 2012;Baláž et al 2013). At the end of the nineteenth century, Mathew Carey Lea discovered that application of mechanical forces and heat treatment decomposed to halogen and metal the halides of gold, silver, platinum, and mercury.…”

Section: Introductionmentioning

confidence: 99%

“…At the end of the nineteenth century, Mathew Carey Lea discovered that application of mechanical forces and heat treatment decomposed to halogen and metal the halides of gold, silver, platinum, and mercury. The same components melt or sublime under heat action, (Fox 1975;Baláž 2000Baláž , 2008Takacs 2004;Baláž et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Later, Clark and Rowan discovered, that milling in the solid state or applying a high pressure on certain compounds could produce the same effects in their structure, (Baláž 2000(Baláž , 2008. Walter Kelley investigated grinding of bentonite and kaolinite, and formulated a theory including only a physical disintegration of the minerals followed by a decrease in the particle size.…”

Section: Introductionmentioning

confidence: 99%

“…In 1938, Bowden and Tabor published results of their studies in tribology, focusing on the contact area between moving surfaces. Temperatures of over 700°C were observed at the contact of solid substances exposed to Editorial handling: J. Elsen friction, (Fox 1975;Tabor 1939, 1966;Baláž 2000Baláž , 2008Baláž et al 2013). Hüttig (1943) determined that activated solid produced by grinding had a thermodynamically and structurally unstable arrangement of the lattice.…”

Section: Introductionmentioning

confidence: 99%

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Mechanochemical activation of natural clay minerals: an alternative to produce sustainable cementitious binders – review

2019

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Mechanochemical activation can be defined as a process able to induce structural disorder through intensive grinding. In certain conditions, it may increase the chemical reactivity of the processed material. The process is extensively utilized in extractive metallurgy, synthesis of nanocomposites or pharmacology. It is also considered an environmentally friendly alternative to activate kaolinitic clay avoiding high calcination temperature. This paper aims to give a comprehensive overview of the process, its evolution, process parameters and applications. The paper focuses on the mechanochemical treatment of natural clay minerals, aiming at their transformation into cementitious or pozzolanic materials. It provides a summarized review of the theories related to the mechanochemistry and discusses commonly used models. The paper also analyzes various key factors and parameters controlling the mechanochemical activation process. The optimization and control of the several factors, as the filling ratio, the grinding media, the velocity, the time of grinding, etc., can promote developments and new research opportunities on different fields of application. Examples of applications, with a special focus on mechanochemically activated clay minerals and their use as cementitious binders, are listed as well.

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Section: Introductionmentioning

confidence: 99%