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Advances in the Characterization of Materials
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Advances in the Characterization of Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Materials Characterization".

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 2288

Special Issue Editors

Prof. Dr. Luis Alfonso Trujillo-Cayado

E-Mail Website
Guest Editor
Departamento de Ingeniería Química, Escuela Politécnica Superior, Universidad de Sevilla, Sevilla, Spain
Interests: emulsions; surfactant; rheology; disperse system; nanoemugels; cryo-SEM; multiple light scattering; laser diffraction; nanoencapulation; suspoemulsion
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jenifer Santos García

E-Mail Website
Guest Editor
Departamento de Ciencias de la Salud y Biomédicas, Universidad Loyola Andalucía, 41704 Dos Hermanas, Spain
Interests: emulsions; surfactants; proteins; food technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is my pleasure to invite you to submit a manuscript to the Special Issue, "Advances in the Characterization of Materials ", published in Materials (impact factor: 3.748). The main objective of this Special Issue is to publish outstanding reviews and original papers presenting cutting-edge advances in the field of materials characterization. It represents a good opportunity for researchers around the world to disseminate their work and report their results related to this topic.

The purpose of this Special Issue is to bring together current perspectives from materials scientists, physicists, chemists, and chemical engineers, as well as others who are active in the field, to discuss the topics mentioned above. We are pleased to invite authors to submit original research papers, reviews, short messages, and concept papers. The scope of this Special Issue covers the entire range of topics related to materials characterization which would benefit both academia and industry.

Prof. Dr. Luis Alfonso Trujillo-Cayado
Prof. Dr. Jenifer Santos
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • characterization
  • development
  • materials
  • rheology
  • properties

Published Papers (2 papers)

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Research

18 pages, 1517 KiB  
Article
Material Characterization of Polypropylene and Polystyrene Regarding Molecular Degradation Behavior
by Christoph Schall and Volker Schöppner
Materials 2023, 16(17), 5891; https://doi.org/10.3390/ma16175891 - 28 Aug 2023
Viewed by 733
Abstract
During the processing of thermoplastics, polymers are subjected to high stress. As a result of this stress, the polymer chains break, leading to a lower molar mass. This further leads to a lower viscosity of the plastic melt and, eventually, to poorer mechanical [...] Read more.
During the processing of thermoplastics, polymers are subjected to high stress. As a result of this stress, the polymer chains break, leading to a lower molar mass. This further leads to a lower viscosity of the plastic melt and, eventually, to poorer mechanical properties of the manufactured plastic product. Especially in the context of recycling plastics, this poses a challenge to process technology and product properties. This work aims is to provide a prediction of the material degradation under known stress, so that, for example, a process design that is gentle on the material can be carried out. In order to be able to predict material degradation under a load, a test stand for defined material degradation was designed. The test stand allows for material damaging under a defined temperature, shear rate and residence time. At the same time, the test stand can be used to measure the viscosity, which is used to describe the degradation behavior, since the viscosity correlates with the molar mass. The measured decrease in viscosity under stress can be used to predict material damage under the influencing variables of temperature, shear rate and residence time by means of a test plan and a suitable mathematical description of the measured data. The mathematical description can thus be integrated into simulation environments for plastics processing, so that a simulation of the material degradation can be carried out, if necessary also taking the viscosity reduction into account. Full article
(This article belongs to the Special Issue Advances in the Characterization of Materials)
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13 pages, 2296 KiB  
Article
Synthesis, Characterization, and Polishing Properties of a Lanthanum Cerium Fluoride Abrasive
by Yan Mei, Wenjuan Chen and Xuean Chen
Materials 2023, 16(9), 3393; https://doi.org/10.3390/ma16093393 - 26 Apr 2023
Viewed by 1133
Abstract
One kind of lanthanum cerium fluoride abrasive was prepared using the raw materials Ce2(CO3)3, La·Ce(CO3)3, and NH4F at temperatures of 400–1050 °C. The combined techniques of X-ray diffraction with Rietveld refinements, [...] Read more.
One kind of lanthanum cerium fluoride abrasive was prepared using the raw materials Ce2(CO3)3, La·Ce(CO3)3, and NH4F at temperatures of 400–1050 °C. The combined techniques of X-ray diffraction with Rietveld refinements, scanning electron microscopy, and X-ray photoelectron spectroscopy were employed to characterize the products. It was found that the materials are all made up of agglomerated irregular block-shaped particles with particle sizes in micrometer ranges. Below 850 °C, the product is a mixture of cubic CeO2 and trigonal LaF3, while above 900 °C, it is a mixture of cubic CeO2 and tetragonal LaOF. A higher calcination temperature suppresses the formation of the LaF3 phase but enhances the LaOF phase. The Ce in the prepared material is present in mixed states of Ce3+ and Ce4+, and the Ce4+/Ce3+ ratio increases with increasing calcination temperature. When the material prepared at 900 °C was used in the polishing test on K9 glass, the obtained polishing surface is very clean and flat, and the thickness difference before and after grinding is moderate, indicating its potential as an abrasive for polishing the surface of optical glass. Full article
(This article belongs to the Special Issue Advances in the Characterization of Materials)
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