scholarly journals The Effect of Microwave on the Crystallization Behavior of CMAS System Glass-Ceramics

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4555
Author(s):  
Hangren Li ◽  
Saiyu Liu ◽  
Wence Xu ◽  
Yuxuan Zhang ◽  
Xin Li ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Metal Ions ◽  
Microwave Heating ◽  
Materials Science ◽  
Microwave Sintering ◽  
Glass Ceramics ◽  
Glass Network ◽  
Microwave Effect ◽  
Active Metal ◽  
Crystal Growth Mechanism

The microwave sintering of glass-ceramics, non-thermal microwave effect, and crystal growth mechanism remain important challenges in materials science. In this study, we focus on developing approaches to affect crystal growth in the glass network of glass-ceramics by microwave heating, rather than performing a single study on the crystal structure and type. Raman spectroscopy is used to detect the structure of the glass network. We demonstrated that the non-thermal microwave effect promoted the diffusion of metal ions, which promoted the aggregation and precipitation of metal ions in the glass network to form crystals. The samples produced by microwave heating contain more non-bridging oxygen bonds than conventional sintered samples; therefore, the non-thermal microwave effect has a depolymerization effect on the glass network of the sample. Under the influence of microwave field, many metal ions precipitate, which precipitates many crystal nuclei. In addition, many active metal ions are captured during the crystal nucleus growth, which shortens the sintering process of glass-ceramics.

Montmorillonite Dendrites

1974 ◽  
Vol 32 ◽  
pp. 454-455
Author(s):  
Necip Güven ◽  
Rodney W. Pease
Keyword(s):  
Crystal Growth ◽  
Growth Mechanism ◽  
Growth Front ◽  
Morphological Features ◽  
Dendritic Crystal ◽  
Crystal Growth Mechanism

Morphological features of montmorillonite aggregates in a large number of samples suggest that they may be formed by a dendritic crystal growth mechanism (i.e., tree-like growth by branching of a growth front).

scholarly journals Anodic Stripping Voltammetry with the Hanging Mercury Drop Electrode for Trace Metal Detection in Soil Samples

Chemosensors ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 107
Author(s):  
Kequan Xu ◽  
Clara Pérez-Ràfols ◽  
Amine Marchoud ◽  
María Cuartero ◽  
Gastón A. Crespo
Keyword(s):  
Metal Ions ◽  
Limit Of Detection ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Hanging Mercury Drop Electrode ◽  
Mercury Drop Electrode ◽  
Redox Active ◽  
Active Metal ◽  
Metal Detection ◽  
Trace Metal Detection

The widely spread use of the hanging mercury drop electrode (HMDE) for multi-ion analysis is primarily ascribed to the following reasons: (i) excellent reproducibility owing to the easy renewal of the electrode surface avoiding any hysteresis effect (i.e., a new identical drop is generated for each measurement to be accomplished); (ii) a wide cathodic potential window originating from the passive hydrogen evolution and solvent electrolysis; (iii) the ability to form amalgams with many redox-active metal ions; and (iv) the achievement of (sub)nanomolar limits of detection. On the other hand, the main controversy of the HMDE usage is the high toxicity level of mercury, which has motivated the scientific community to question whether the HMDE deserves to continue being used despite its unique capability for multi-metal detection. In this work, the simultaneous determination of Zn2+, Cd2+, Pb2+, and Cu2+ using the HMDE is investigated as a model system to evaluate the main features of the technique. The analytical benefits of the HMDE in terms of linear range of response, reproducibility, limit of detection, proximity to ideal redox behavior of metal ions and analysis time are herein demonstrated and compared to other electrodes proposed in the literature as less-toxic alternatives to the HMDE. The results have revealed that the HMDE is largely superior to other reported methods in several aspects and, moreover, it displays excellent accuracy when simultaneously analyzing Zn2+, Cd2+, Pb2+, and Cu2+ in such a complex matrix as digested soils. Yet, more efforts are required towards the definitive replacement of the HMDE in the electroanalysis field, despite the elegant approaches already reported in the literature.

scholarly journals Impact of exogenous metal ions on peri-implant bone metabolism: a review

RSC Advances ◽  
2021 ◽  
Vol 11 (22) ◽  
pp. 13152-13163
Author(s):  
Wei Chen ◽  
Wen-qing Zhu ◽  
Jing Qiu
Keyword(s):  
Surface Modification ◽  
Metal Ions ◽  
Bone Metabolism ◽  
Dental Implants ◽  
Materials Science ◽  
Dental Materials ◽  
Intense Research

The development of effective methods to promote the osseointegration of dental implants by surface modification is an area of intense research in dental materials science.

On a qualitative model for the incorporation of fluoride nano-crystals within an oxide glass network in oxy-fluoride glass-ceramics

2004 ◽  
Vol 337 (2) ◽  
pp. 191-195 ◽  
Author(s):  
V.K Tikhomirov ◽  
A.B Seddon ◽  
M Ferrari ◽  
M Montagna ◽  
L.F Santos ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Glass Network ◽  
Fluoride Glass ◽  
Oxide Glass ◽  
Qualitative Model

Crystal growth mechanism of VLS-Sm1+xBa2−xCu3Oy films including self-assembled BaZrO3 nanorods

2009 ◽  
Vol 469 (15-20) ◽  
pp. 1414-1417 ◽  
Author(s):  
S. Funaki ◽  
Y. Yoshida ◽  
Y. Ichino ◽  
Y. Takai ◽  
A. Ichinose ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Growth Mechanism ◽  
Crystal Growth Mechanism ◽  
Self Assembled

Research Output of Anna University: A Bibliometric Study Based on Scopus Database

2019 ◽  
Vol 9 (S1) ◽  
pp. 84-91
Author(s):  
N. Geetha ◽  
S. Kothainayaki
Keyword(s):  
Crystal Growth ◽  
Tamil Nadu ◽  
Materials Science ◽  
Research Output ◽  
Bibliometric Study ◽  
Document Type ◽  
Engineering Research ◽  
Steady Growth ◽  
Author Keywords ◽  
Scopus Database

The study analyses research output of Anna University (Tamil Nadu) using Scopus database during the period 1988 to 2017 (30 years). Further predominance was given for Type of Source, Chronological growth, Subject wise contribution, Document type preferred, Collaborated Country, Collaborated Institutions, Contributed Journal, Highly contributed author, Keywords Preferred and Language of the paper.A total of 23,883 records have been identified and the same has been analyzed using bibliometric study. There has been steady growth of publications and 50% of articles appeared during the last five years between 2013 and 2017. The publications were doubled once in seven years. The average publication per year works out to 795 papers and nearly 78% of contributions were from Engineering; Computer Science; Materials Science, Physics and Astronomy. Around 17 Countries collaborated and contributed to more than 101 papers. The top three journals which have more publications were, “International Journal of Applied Engineering Research”; “European Journal of Scientific Research” and “Journal of Crystal Growth”.

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