Glass Ceramics from Modified Şanoviţa (Timiş) Basalt

Kovacs, Gavril; Lazău, Ioan; Menessy, Iuliu; Kovács, Kristóf

doi:10.4028/www.scientific.net/kem.132-136.2135

Cited by 8 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As is well known, these symbols label whether the configuration at the reference carbon in the Fischer projection is the same (or the opposite) as that one in the D-(+)-glyceraldehyde. 43,45 However, this is an old labeling which occurs mostly with names of natural compounds (or substituents made from natural compounds). Nowadays, enantiomers are distinguished as R-and S-isomers.…”

Section: Quinic Acid According To Iupacmentioning

confidence: 99%

Unremitting Problems With Chlorogenic Acid Nomenclature: A Review

Kremr¹,

Bajer²,

Bajerová³

et al. 2016

Química Nova

View full text Add to dashboard Cite

Recebido em 08/12/2015; aceito em 12/01/2016; publicado na web em 12/04/2016 This paper summarizes a problematic nomenclature of isomers belonging to chlorogenic acid family since its first occurrence until present. During decades, there have been a high number of articles dealing with the family. Unfortunately, researchers who want to get knowledge about this topic may be strongly confused after reading a few articles. Due to gradual discoveries and isolations of the individual isomers from plenty of matrices and because of the changing system of terminology after these discoveries, discrepancies among articles are common. The cause of this confusion is that the main compound of the family, 5-caffeoylquinic acid (also wellknown as chlorogenic acid), was truly called as 3-caffeoylquinic acid before 1976, when new rules for nomenclature were published. Many researchers and also chemicals suppliers, however, keep using the "pre-IUPAC" nomenclature and wrongly call 3-caffeoylquinic acid as chlorogenic acid, the main substituent of the family. Despite there have been some works struggling with this issue, the problem is still appearing. Therefore, the present work was written.

show abstract

Section: Quinic Acid According To Iupacmentioning

confidence: 99%

Unremitting Problems With Chlorogenic Acid Nomenclature: A Review

Kremr¹,

Bajer²,

Bajerová³

et al. 2016

Química Nova

View full text Add to dashboard Cite

show abstract

“…In order to realize a molar ratio SiO 2 /MeO (Me=Ca, Mg, Fe) close to 1 (specific for the pyroxene solid solution) glasses BD and BVM have been elaborated; their composition has been obtained by MgCO 3 and CaCO 3 addition to the natural basalt (SB). Based on our experience and on the literature data [1][2][3][4][5][6][7] concerning the obtainment of pyroxene glass ceramic products, there have been also elaborated basalt glasses having in their composition different nucleating agents: 3%CaF 2 (sample BD-F3), 5%CaF 2 (sample BD-F5), 8%CaF 2 (sample BD-F8), 10%CaF 2 (sample BD-F10), 1%TiO 2 (sample BD-T1), 2%TiO 2 (sample BD-T2), 5%TiO 2 (sample BD-T5 and BVM-T5), 10%TiO 2 (sample BD-T10 and BVM-T10), 15% TiO 2 (sample BVM-T15), 20% TiO 2 (sample BVM-T20) respective 5%-TiO 2 +2%-ZrO 2 (sample BD-T5+Z2) and 10%-TiO 2 +2%-ZrO 2 (sample BD-T10+Z2). After homogenization, the mixtures have been charged in sintered alumina crucibles and melted in an electrical oven having SiC bars, for two hours, at 1350ºC.…”

Section: Methodsmentioning

confidence: 99%

“…Glass ceramics based on basalt (easy accessible natural rock) develop a high mechanical and abrasion resistance as well as a good chemical stability [1,2].The studies in the literature [1][2][3], as well as a series of our own [4][5][6][7], show that reaching the physico-mechanical and chemical high performances for glass-ceramics assumes to choose an optimum chemical composition for the basalt glass, using the proper nucleation agents and adequate thermal treatments to make possible the crystallization processes. The main crystalline phase in basalt-based glass ceramics is the pyroxene solid solution: (Ca,Mg,Fe)SiO 3 [1,[5][6][7]. Some kinetic studies of the crystallization processes in the basalt-based glass ceramics, in which different nucleation agents (TiO 2 , CaF 2 , ZrO 2 ) have been used represented the object of some previous papers [8,9].…”

Section: Introductionmentioning

confidence: 99%

Basalt Based Glass Ceramics. Kinetic Studies of the Crystallization Processes

Lazău

Păcurariu

Kovacs³

et al. 2004

KEM

Self Cite

View full text Add to dashboard Cite

There have been obtained pyroxene glass-ceramic products starting from basalt-based glasses with nucleation agents addition (TiO 2 , CaF 2 , ZrO 2 ). The activation energy of the crystallization processes has been determined based on thermal analysis (DTA). The physicomechanical properties of the obtained glass ceramic products have been correlated with their composition, obtaining conditions and texture.

show abstract

“…The main advantage is that it is possible that the final ceramic product can be given any desired shape, which can be achieved by recycling glass. Changing of the conditions of heat processing can produce a material with predefined characteristics [1,26].…”

Section: Introductionmentioning

confidence: 99%

Glass-ceramics obtained by the crystallization of basalt

Cocic

Logar²,

Matović

et al. 2010

SCI SINTER

View full text Add to dashboard Cite

The possibility to obtain glass-ceramics from basalt from the locality on Vrelo (Kopaonik mt.) is shown in this paper. The parent rock was ground to fraction -0.4 +0.1 mm, and then melted at 1250 - 1300°C. The crystallization melted bazaltic glass at 950°C during the time interval of 3 hours caused synthesis of a glass-ceramic material with a microstructure that has excellent mechanical properties according to the determined dynamic modulus of elasticity and uniaxial compresive strength. The phase composition of the obtained glass ceramic material was determined by XRPD using Rietveld refinement and SEM. Two phases were found: pyroxene which corresponds to omphacite of the composition (Na0.199 K0.180 Ca0.471 Mg0.249)1.1(Mg0.271Fe0.299Al0.430)1.0(Si1.704Ti0.046Al0.250)2.0O6 and glass with an approximate relationship 69:31

show abstract

Glass Ceramics from Modified Şanoviţa (Timiş) Basalt

Cited by 8 publications

References 0 publications

Unremitting Problems With Chlorogenic Acid Nomenclature: A Review

Unremitting Problems With Chlorogenic Acid Nomenclature: A Review

Basalt Based Glass Ceramics. Kinetic Studies of the Crystallization Processes

Glass-ceramics obtained by the crystallization of basalt

Contact Info

Product

Resources

About