Zur Tribochemischen Zersetzung von Alkali‐Bromaten und ‐Nitraten

Boldyrew, W. W.; Awwakumow, E. G.; Strugowa, L. I.; Harenz, H.; Heinicke, G.

doi:10.1002/zaac.19723930209

Cited by 23 publications

(14 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Where a new product forms, for example in a multi-phase reaction, this can often take the form of exothermic nucleation. Although proving whether a reaction is thermo or mechanochemical can be challenging, a number of clear examples can be given, including the dark dimerization of aromatic compounds at high pressures ( Engelke and Blais, 1994 ; Politov et al, 2010 ; Friedrich et al, 2020 ), the classic examples of the decomposition of metal halides by Carey Lea ( Carey-Lea, 1892 ; Carey-Lea, 1894 ), the decomposition of alkali metal nitrates, bromates, and chlorates, which give different products and follows inverted trends upon heating and mechanical action ( Boldyrev, 1972 ; Boldyrev et al, 1972 ; Urakaev et al, 1977 ; Boldyrev and Heinicke, 1979 ), or oxidation of gold by carbon dioxide ( Thiessen et al, 1970 ). The relations between mechanochemical and thermochemical nature of the reactions can be compared with a situation when light and temperature act on a sample simultaneously.…”

Section: What Is In a Name?mentioning

confidence: 99%

Tribochemistry, Mechanical Alloying, Mechanochemistry: What is in a Name?

Michalchuk

Болдырева²,

Belenguer³

et al. 2021

Front. Chem.

151

108

View full text Add to dashboard Cite

Over the decades, the application of mechanical force to influence chemical reactions has been called by various names: mechanochemistry, tribochemistry, mechanical alloying, to name but a few. The evolution of these terms has largely mirrored the understanding of the field. But what is meant by these terms, why have they evolved, and does it really matter how a process is called? Which parameters should be defined to describe unambiguously the experimental conditions such that others can reproduce the results, or to allow a meaningful comparison between processes explored under different conditions? Can the information on the process be encoded in a clear, concise, and self-explanatory way? We address these questions in this Opinion contribution, which we hope will spark timely and constructive discussion across the international mechanochemical community.

show abstract

Section: What Is In a Name?mentioning

confidence: 99%

Tribochemistry, Mechanical Alloying, Mechanochemistry: What is in a Name?

Michalchuk

Болдырева²,

Belenguer³

et al. 2021

Front. Chem.

151

108

View full text Add to dashboard Cite

show abstract

“…The material can go into an excited state immediately during exposure, and high levels are attainable that are inaccessible under heating [134,[136][137][138]. Therefore, mechanolysis products can fundamentally differ from thermolysis products and can coincide with, or be similar to, photolysis or radiolysis products [139][140][141]. The very complex and interesting question of how exactly the energy of a mechanical impact is transformed to the energy of dissociation of chemical bonds has been discussed in the literature for a long time [79,[134][135][136][137][138][139][140][141][142], but is yet far from being settled.…”

Section: The Main Types Of Mechanical Impacts the Devices To Implement Them And The Processes Induced In The Exposed Substance Mechanochementioning

confidence: 99%

“…Therefore, mechanolysis products can fundamentally differ from thermolysis products and can coincide with, or be similar to, photolysis or radiolysis products [139][140][141]. The very complex and interesting question of how exactly the energy of a mechanical impact is transformed to the energy of dissociation of chemical bonds has been discussed in the literature for a long time [79,[134][135][136][137][138][139][140][141][142], but is yet far from being settled. As an example of modern achieve- I II III ments in understanding how the energy of mechanical exposure, in particular shock, is transformed to the energy of dissociation of specific chemical bonds, we may refer to [143,144].…”

Section: The Main Types Of Mechanical Impacts the Devices To Implement Them And The Processes Induced In The Exposed Substance Mechanochementioning

confidence: 99%

Role of Mixing and Milling in Mechanochemical Synthesis (Review)

Лапшин

Болдырева

Болдырев

2021

Russ. J. Inorg. Chem.

View full text Add to dashboard Cite

Selected topics of inorganic mechanochemical synthesis are discussed. Variant mechanochemical syntheses are considered. The ex situ and in situ/operando methods to monitor the process are discussed. Methods for controlling the yield and kinetics of the mechanochemical synthesis are considered. The challenges and possible ways to address them are discussed. Thermal and mechanochemical syntheses are compared, with a special focus on mixing and milling processes. We consider the effects of various types of mechanical treatment on individual particles and on their mixtures. A special attention is paid to the macrokinetics of mechanochemical synthesis and its role in mixing and milling. The basic assumptions that render a mathematical model capable of describing the macrokinetics of mechanochemical synthesis in solid + reactive gas and solid + solid systems are written.

show abstract

“…Other techniques like HREM, EXFAX and X-ray cyclotron resonance have been used to study the new surfaces [5,6]. In sophisticated experiments like reactions produced during crack formation, MS enables the determination of the gaseous products as in the decomposition of nitrates and bromates [7].…”

Section: Monitoring Mechanochemical Processesmentioning

confidence: 99%

Mechanochemistry: an overview

Fernandez-Bertran¹

1999

Pure and Applied Chemistry

241

107

View full text Add to dashboard Cite

The field of mechanochemistry is reviewed. A large number of mechanochemical reactions are described as well as industrial applications. CermetsMilling a soft metal with a hard ceramic material leads to the formation of valuable composites with new important properties: the cermets.On milling, the hard ceramic particles becomes imbedded in a metal host matrix. On further milling, the hard particles are micronized and the metal covers the fine ceramic units leading to spherical particles, the cermets [3,35]. Mechanical activation of mineralsMilling certain minerals alters their properties in ways that can be used in industry:1 Silica, alumina and alumino-silicates can be activated to be valuable catalyst, with the incorporation of small amount of metals [1,2].2 Bauxite can be activated by milling, allowing its extraction of Al(OH) 3 by concentrated NaOH solutions at lower temperatures. This allows a purer Al(OH) 3 to be obtained for Al production [1,2].3 Phosphate rock, the main source of P in the fertilizer industry, can be amorphized under high mechanical impact, leading to a material than can be attacked by the plant roots. This new fertilizer, tribophos, is cheaper than those obtained by treating the mineral with sulfuric or phosphoric acid [1,2].4 If instead of using sand and gravel in the concrete industry, the freshly ground rock is mixed with the cement and water, a very hard concrete results, superconcrete, with the cement phase strongly bound to the hard rock and sand phase [1,2].Many more uses of mechanical activation will certainly be developed in the future.

show abstract

Zur Tribochemischen Zersetzung von Alkali‐Bromaten und ‐Nitraten

Cited by 23 publications

References 1 publication

Tribochemistry, Mechanical Alloying, Mechanochemistry: What is in a Name?

Tribochemistry, Mechanical Alloying, Mechanochemistry: What is in a Name?

Role of Mixing and Milling in Mechanochemical Synthesis (Review)

Mechanochemistry: an overview

Contact Info

Product

Resources

About