Theoretical Assessment of the Prospects for the Use of Raw Materials in Ceramic Production

The paper presents the results of analyzing the prospects of using clay raw materials in a composition with metallurgical slags for the production of ceramic products. The results of the analysis of the chemical and mineralogical properties of clay from the Khalilovsky deposit in the Orenburg region and nickel slags from the dumps of the South Ural Nickel Combine are presented. The studies were carried out using X-ray fluorescence and differential thermal analysis methods. The article presents the performed X-ray and derivatograms of slag and clay and the features of the experimental types of raw materials revealed during their analysis. The connection between the chemical and mineralogical compositions of the experimental clay and slags on the technological properties of finished ceramic products has been theoretically established. The use of XRF and DTA to study the characteristics of plastic and non-plastic raw materials made it possible at the first stages of the experiment to reject materials that were unsatisfactory in properties for the production of ceramic products, which contributes to the optimization of experiments, rational consumption of costs of newly mined clay raw materials.

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The Roman Ceramics of Salobrena (Granada-Spain) and their Raw Materials

MRS Proceedings ◽

10.1557/proc-267-627 ◽

1992 ◽

Vol 267 ◽

Author(s):

Ana M De Andres ◽

Isabel MuÑOZ

Keyword(s):

Thermal Analysis ◽

Differential Thermal Analysis ◽

Raw Materials ◽

Third Century ◽

Western Coast ◽

X Ray Diffraction ◽

X Ray ◽

The Third ◽

Good Number ◽

Scanning Electron

ABSTRACTNineteen roman ceramic sherds found near Salobreña (Granada, Spain), in the western coast of the Mediterranean Sea, as well as different ceramic clays from the surroundingsare studied. Both clays and ceramic sherds are characterizad by X-ray diffraction and spectrometry, differential thermal analysis, and scanning electron and optical microscopies. A good number of the ceramic pieces, among which some “Terrae Sigillatae”, have a composition similar to that of the local clays and, thus, have been probably manufactured at Salobreña. Only a few of them have a foreign origin. For most of them, the firing temperature was about 800-850 °C, although some have been produced at 900-1000 °C, and some others at 1000-1100 °C. It is concluded that Salobreña appearsto have been an important settlement just in the third century of the Christian era.

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PENINGKATAN LAJU DISOLUSI ACYCLOVIR DENGAN METODE SISTEM DISPERSI PADAT MENGGUNAKAN POLOXAMER 188

SCIENTIA : Jurnal Farmasi dan Kesehatan ◽

10.36434/scientia.v5i1.61 ◽

2016 ◽

Vol 5 (1) ◽

pp. 6

Author(s):

Budi Setiawan ◽

Erizal Zaini ◽

Salman Umar

Keyword(s):

Electron Microscopy ◽

Thermal Analysis ◽

Scanning Electron Microscopy ◽

Fourier Transform ◽

Differential Thermal Analysis ◽

Fourier Transform Infrared ◽

X Ray Diffraction ◽

Poloxamer 188 ◽

X Ray ◽

Scanning Electron

Sebuah penelitian tentang sistem dispersi padat dari asiklovir dengan poloxamer 188 telah dilakukan formulasi dengan pencampuran secara fisika dengan rasio 1 : 1, 1 : 3, 1 : 5 dan dispersi padat 1 : 1, 1 : 3, 1 : 5 dan penggilingan 1:1 sebagai pembanding. Dispersi padat dibuat menggunakan metode pencairan (fusi), yang digabung dengan poloxamer 188 pada hotplate kemudian asiklovir dimasukkan ke dalam hasil poloxamer 188 lalu di kocok hingga membentuk masa homogen. Semua formula yang terbentuk termasuk asiklovir poloxamer 188 murni dianalisis karakterisasinya dengan Differential Thermal Analysis (DTA), X-ray Diffraction, Scanning Electron Microscopy (SEM), dan Fourier Transform Infrared (FTIR), kemudian pengambilan dilakukan (penentuan kadar) mengunakan spektrofotometer UV pada panjang gelombang 257,08 nm dan uji laju disolusi dengan aquadest bebas CO2 menggunakan metode dayung. Hasil pengambilan (penentuan kadar) menunjukkan bahwa semua formula memenuhi persyaratan farmakope Amerika edisi 30 dan farmakope Indonesia edisi 4 yaitu 95-110%. Sedangkan hasil uji laju disolusi untuk campuran fisik 1: 1, dan dispersi padat 1: 1, dan penggilingan 1: 1 menunjukkan peningkatan yang nyata dibandingkan asiklovir murni. Hal ini juga dapat dilihat dari hasil perhitungan statistik menggunakan analisis varian satu arah SPSS 17.

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The Potential for Natural Stones from Northeastern Brazil to Be Used in Civil Construction

Minerals ◽

10.3390/min11050440 ◽

2021 ◽

Vol 11 (5) ◽

pp. 440

Author(s):

Fabiana Pereira da Costa ◽

Jucielle Veras Fernandes ◽

Luiz Ronaldo Lisboa de Melo ◽

Alisson Mendes Rodrigues ◽

Romualdo Rodrigues Menezes ◽

...

Keyword(s):

Mechanical Properties ◽

Thermal Analysis ◽

Differential Thermal Analysis ◽

Chemical Resistance ◽

Mechanical Analysis ◽

Northeastern Brazil ◽

X Ray Diffraction ◽

X Ray ◽

Chemical Agents ◽

Natural Stones

Natural stones (limestones, granites, and marble) from mines located in northeastern Brazil were investigated to discover their potential for use in civil construction. The natural stones were characterized by chemical analysis, X-ray diffraction, differential thermal analysis, and optical microscopy. The physical-mechanical properties (apparent density, porosity, water absorption, compressive and flexural strength, impact, and abrasion) and chemical resistance properties were also evaluated. The results of the physical-mechanical analysis indicated that the natural stones investigated have the potential to be used in different environments (interior, exterior), taking into account factors such as people’s circulation and exposure to chemical agents.

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X-Ray Investigations of the Low-Temperature Phases of the Organic Metals α- and β-(BEDT-TTF)2I3

Zeitschrift für Naturforschung A ◽

10.1515/zna-1986-1110 ◽

1986 ◽

Vol 41 (11) ◽

pp. 1319-1324 ◽

Cited By ~ 10

Author(s):

H. Endres ◽

H. J. Keller ◽

R. Swietlik ◽

D. Schweitzer ◽

K. Angermund ◽

...

Keyword(s):

Thermal Analysis ◽

Differential Thermal Analysis ◽

Room Temperature ◽

Unit Cell Volume ◽

Unit Cell ◽

Slight Variation ◽

X Ray ◽

Organic Metals ◽

Β Phase ◽

Α Phase

The structure of single crystals of the organic metals α- and β-(BEDT-TTF)2I3* was determined at 100 K, well below the phase transitions indicated by resistivity and thermopower measurements as well as by differential thermal analysis. In the α-phase no unusual change of the room temperature unit cell but a slight variation in the triiodide network and especially a more pronounced dimerization in one of the two donor stacks have been found. The β-phase develops a superstructure with a unit cell volume three times as large as that at room temperature and with pronounced distortions of the I3--ions.

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Influence of the Al content on the phase transformations in Cu-Al-Ag alloys

Eclética Química ◽

10.1590/s0100-46702003000100004 ◽

2003 ◽

Vol 28 (1) ◽

pp. 33-38 ◽

Cited By ~ 6

Author(s):

A. T. Adorno ◽

A. V. Benedetti ◽

R. A. G. da Silva ◽

M. Blanco

Keyword(s):

Thermal Analysis ◽

Differential Thermal Analysis ◽

Transition Temperature ◽

Phase Transformations ◽

Decomposition Reaction ◽

Phase Decomposition ◽

Stability Range ◽

X Ray ◽

Al Content ◽

The Stability

The influence of the Al content on the phase transformations in Cu-Al-Ag alloys was studied by classical differential thermal analysis (DTA), optical microscopy (OM) and X-ray diffractometry (XRD). The results indicated that the increase in the Al content and the presence of Ag decrease the rate of the <FONT FACE=Symbol>b</font>1 phase decomposition reaction and contribute for the raise of this transition temperature, thus decreasing the stability range of the perlitic phase resulted from the b1 decomposition reaction.

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Silica-Kaolin Mix Effect on Evaporative Pattern Castings Surface Roughness

Archives of Foundry Engineering ◽

10.1515/afe-2016-0055 ◽

2016 ◽

Vol 16 (3) ◽

pp. 83-88 ◽

Cited By ~ 1

Author(s):

B.V. Omidiji ◽

R.H. Khan ◽

M.S. Abolarin

Keyword(s):

Thermal Analysis ◽

Surface Roughness ◽

Differential Thermal Analysis ◽

Ratio Method ◽

Gating System ◽

X Ray Diffraction ◽

Pouring Temperature ◽

Material Loss ◽

Refractory Coating ◽

X Ray

Abstract The influence of the refractory coating which is a mixture of silica flour and kaolin on the surface roughness of the plate castings produced using evaporative patterns had been considered in this work. The kaolin was used as a binder and ratio method was employed to form basis for the factorial design of experiment which led to nine runs of experiments. Methyl alcohol at 99% concentration was used as the carrier for the transfer of the coating to the surface of the patterns. Pouring temperature was observed as a process parameter alongside the mix ratios of the coating. Attempts were made to characterize the refractory coating by using two methods; differential thermal analysis (DTA) and X-ray diffraction. Attempt was also made to characterize the casting material. Gating system design was done for the plate casting to determine the correct proportions of the gating parameters in order to construct the gating system properly to avoid turbulence during pouring of liquid metal. A digital profilometer was used to take the measurements of the surface roughness. It was observed that the mix ratio 90% silica flour-10% kaolin produced the lowest value of the surface roughness of the plate castings and had the lowest material loss in the DTA test. The pouring temperature of 650°C produced best casting.

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SOLUBILITY OF GERMANIUM DISELENIDE IN THE Cu3AsSe4

Azerbaijan Chemical Journal ◽

10.32737/0005-2531-2021-4-67-70 ◽

2021 ◽

Vol 0 (4) ◽

pp. 67-70

Author(s):

Z.T. Hasanova ◽

Keyword(s):

Thermal Analysis ◽

Differential Thermal Analysis ◽

Phase Equilibria ◽

Solid Solutions ◽

X Ray Diffraction ◽

X Ray

Differential thermal analysis and powder X-ray diffraction methods were used for phase equilibria studying in the Cu3AsSe4-GeSe2 system. It was established that wide (up to 30 mol.%) solid solutions based on Cu3AsSe4 are formed. GeSe2-rich alloys consist of various heterogeneous mixtures, including phases outside the T–x plane of this section

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Preparation, differential thermal analysis and crystal structure of the new quaternary compound CuVInSe3

Revista Mexicana de Física ◽

10.31349/revmexfis.64.548 ◽

2018 ◽

Vol 64 (6) ◽

pp. 548

Author(s):

Gustavo Marroquin ◽

Gerzon E. Delgado ◽

Pedro Grima-Gallardo ◽

Miguel Quintero

Keyword(s):

Crystal Structure ◽

Thermal Analysis ◽

Differential Thermal Analysis ◽

Powder Diffraction ◽

Powder Diffraction Data ◽

Unit Cell Parameters ◽

Quaternary Compound ◽

X Ray ◽

Cell Parameters ◽

Structural Variables

The crystal structure of the quaternary compound CuVInSe3 belonging to the system (CuInSe2)1-x(VSe)x with x= ½, was analyzed using X-ray powder diffraction data. This material was synthesized by the melt and anneal method and crystallizes in the tetragonal space group P2c (Nº 112), with unit cell parameters a = 5.7909(4) Å, c = 11.625(1) Å, V = 389.84(5) Å3. The Rietveld refinement of 25 instrumental and structural variables led to Rexp = 6.6 %, Rp = 8.7 %, Rwp = 8.8 % and S = 1.3 for 4501 step intensities and 153 independent reflections. This compound has a normal adamantane structure and is isostructural with CuFeInSe3. The DTA indicates that this compound melts at 1332 K.

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