scholarly journals Impedance Based Characterization of Raw Materials Used in Electrochemical Manufacturing

2014 ◽  
Vol 23 (3) ◽  
pp. 63-67 ◽  
Author(s):  
D. P. Riemer ◽  
M. Orazem
Keyword(s):  
Raw Materials ◽  
Materials Used

Characterization of clays from the Foumban region (west Cameroon) and evaluation for refractory brick manufacture

Clay Minerals ◽  
2018 ◽  
Vol 53 (3) ◽  
pp. 447-457
Author(s):  
A. Pountouenchi ◽  
D. Njoya ◽  
A. Njoya ◽  
D. Rabibisao ◽  
J.R. Mache ◽  
...  
Keyword(s):  
Material Properties ◽  
Major Element ◽  
Raw Materials ◽  
Mineralogical Composition ◽  
Refractory Brick ◽  
Major Element Chemistry ◽  
End Products ◽  
Materials Used ◽  
Steel Mould

ABSTRACTThree clayey materials named MY3, KK and KG originating from the Foumban region (west Cameroon) were analysed to determine their granulometry, plasticity, major-element chemistry and mineralogy. Dilatometric and ceramic behaviour were also investigated. Clays were shaped by uniaxial pressing in a steel mould. Shaped samples were heated at 1300, 1400 and 1500°C. The end products were characterized in terms of their density, porosity and compressive strength. Raw materials differ in terms of their mineralogical composition, grain-size distribution, Al2O3 content and the nature and abundance of impurities inducing specific thermal behaviour during dilatometric analysis and sintering tests. The final material properties may be related to the main features of the raw materials used.

Analysis of the Incorporation of Scheelite Residue in Kaolinitic Clay of Boa Saúde-RN

2012 ◽  
Vol 727-728 ◽  
pp. 844-849 ◽  
Author(s):  
Tércio G. Machado ◽  
Uilame Umbelino Gomes ◽  
Flanelson M. Monteiro ◽  
Samara M. Valcacer ◽  
Gilson G. da Silva
Keyword(s):  
Raw Materials ◽  
Particle Size Analysis ◽  
Northeastern Brazil ◽  
Size Analysis ◽  
Bending Tests ◽  
Materials Used ◽  
Kaolinitic Clay ◽  
The City ◽  
Mineral Waste

The scheelite occurs mainly in northeastern Brazil, with highest abundance in the states of Rio Grande do Norte and Paraíba - Scheelite Seridó Province. Mining is considered an activity that provides a high environmental degradation due to the large amount of minerals and waste involved. Most mining companies have no technologies or processes that allow the recycling of mineral waste generated. The aim of this study is to evaluate the influence of different percentages of reject on the mechanical properties of scheelite and aesthetic (staining of the final product after firing) of the clay of the city of Boa Saúde - RN. The raw materials used were characterized by XRD, XRF and particle size analysis. Assay was performed by water absorption, linear retraction and bending tests on three points for the characterization of the final product. The raw materials used were from the city of Currais Novos-RN.

scholarly journals Chemical and mineralogical characterization of portuguese ceramic tiles in the historic center of São Luís do Maranhão (Brazil): an approximation of the mineralogy and firing temperature of the raw materials

2013 ◽  
Vol 66 (1) ◽  
pp. 91-98 ◽  
Author(s):  
José Manuel Rivas Mercury ◽  
Domingos de Jesus Costa Pereira ◽  
Nazaré do Socorro Lemos Silva Vasconcelos ◽  
Aluísio Alves Cabral Jr. ◽  
Romulo Simões Angélica
Keyword(s):  
Firing Temperature ◽  
Raw Materials ◽  
X Ray Diffraction ◽  
Ceramic Tiles ◽  
Mineralogical Characterization ◽  
Calcium Carbonates ◽  
Historic Center ◽  
Mineral Phases ◽  
Materials Used

This work involved the first-ever characterization of antique Portuguese ceramic wall tiles in the Historic Center of São Luis do Maranhão, Brazil. The tiles were characterized by optical microscopy, X-ray diffraction (XRD) and chemical analysis to identify the possible raw materials used in the fabrication process, as well as the firing temperature of these materials. The results indicate that the microstructure of these materials consists of pores of varying sizes with calcite incrustations and quartz grain sizes smaller than 500 µm distributed in a pinkish yellow matrix, which were identified by XRD as calcite, gehlenite, wollastonite, quartz, and amorphous mineral phases. Based on this information, it can be inferred that the original raw materials probably consisted of a mixture of kaolinitic clays (Al2O3·2SiO2·2H2O) rich in calcium carbonates and quartz, or mixtures of kaolinitic clays, quartz and calcite, which did not reach the pre-firing temperature of 950ºC.

The Characterization of Obsidian and its application to the Mediterranean Region

1964 ◽  
Vol 30 ◽  
pp. 111-133 ◽  
Author(s):  
J. R. Cann ◽  
Colin Renfrew
Keyword(s):  
Raw Materials ◽  
Cultural Groups ◽  
The Past ◽  
Characterization Study ◽  
Dating Methods ◽  
Comprehensive Survey ◽  
Absolute Dating ◽  
Place Of Origin ◽  
Materials Used

Evidence of contact between cultural groups is of great importance to the study of prehistory. Although the development of absolute dating methods has decreased our dependence on the discovery of such contacts for chronology, they are essential material when the origin and spread of culture is being studied. In the past, cultural contacts have generally been demonstrated by typological similarities of artifacts, but unfortunately many typological comparisons are open to discussion, and it can be exceedingly difficult to be certain of direct contact by this means alone.The importance in this respect of the study of raw materials used in places far from their place of origin and presumably deliberately imported has long been realized. Recently more attention has been paid to the careful characterization of such materials; the detection, that is, of properties of the specimen under study which are characteristic of material from particular sources. By this means it is often possible to assign a source to a given specimen. The petrological identification of British neolithic stone axes is perhaps the most comprehensive archaeological characterization study yet undertaken. Demonstrations of trading links made by such methods, if based on a sure identification and a comprehensive survey of possible sources, are not open to the criticism and doubt which may be directed at typological similarities. The variety of techniques now available for the analysis and identification of materials makes this field a promising one for the archaeologist.

Reassessing Bronze Age Manufacturing Technologies at Nuzi

2007 ◽  
Vol 1047 ◽  
Author(s):  
Andrew Shortland ◽  
Katherine Eremin ◽  
Susanna Kirk ◽  
James Armstrong
Keyword(s):  
Bronze Age ◽  
Raw Materials ◽  
Copper Alloys ◽  
Metal Artifacts ◽  
Full Characterization ◽  
The Past ◽  
Materials Used ◽  
Manufacturing Technologies ◽  
Important Site

AbstractThe Hurrian city of Nuzi, in modern Iraq, was an important site during the Mesopotamian Bronze Age. Excavations in the late 20s and early 30s yielded a large and important assemblage of glass and other vitreous materials and smaller but significant assemblages of metals and ceramics. Although the vitreous materials have been widely studied in the past, the other assemblages have received little attention. However a recent study of some metal artifacts indicated the presence of brass and dirty copper rather than the expected bronze. This study was, however, limited to a few objects and the proportions of the different alloys was not investigated. Recent analytical studies on the glass beads have highlighted compositional differences between Egyptian and Mesopotamian glass and attempted to link these to the raw materials used. The lack of significant tin or zinc in glasses colored with copper is interesting given the presence of brass and the apparent scarcity of bronze in the copper alloys. The current study involves reassessment of the entire assemblage, concentrating initially on the vitreous materials, glazes and metals. Variations in preservation across the site and within individual buildings are currently being examined. Full characterization of the assemblages will allow relationships between different manufacturing technologies and the raw materials needed to be investigated.

Elaboration and characterization of ceramic membrane supports from raw materials used in microfiltration

2015 ◽  
Vol 57 (12) ◽  
pp. 5241-5245 ◽  
Author(s):  
Boudjemaa Ghouil ◽  
Abdelhamid Harabi ◽  
Ferhat Bouzerara ◽  
Noureddine Brihi
Keyword(s):  
Ceramic Membrane ◽  
Raw Materials ◽  
Materials Used

Quality Characterization of Iron Dust Exhaust Thermal as Alternative Ceramic Coating Raw Materials in a Brazilian Company

2014 ◽  
Vol 1077 ◽  
pp. 135-138
Author(s):  
Luiz Oliveira Veriano dalla Valentina ◽  
Marilena Valadares Folgueras ◽  
Wanessa Rejane Knop ◽  
Maria Cristina Pacheco do Nascimento ◽  
Glaucia Aparecida Prates
Keyword(s):  
Ceramic Coating ◽  
Raw Materials ◽  
Ceramic Materials ◽  
Raw Material ◽  
Silica Sand ◽  
Commercial Application ◽  
X Ray Diffraction ◽  
X Ray ◽  
Materials Used

As the raw materials used in the ceramic materials manufacturing are natural, it is important to use them as a alternative materials, thus decreasing the elements demand taken from nature. This paper aims the characterization of foundry solid powder exhaust from a brazilian company located in Joinville - SC as an alternative raw material for ceramic coating by X-ray diffraction (XRD), thermal analysis (DSC) and thermogravimetric (TG). The dust depletion is caused in the manufacturing mold sand process, when the bentonita (clay), silica sand and coal during the metal parts production are mixed in green sand production. The raw materials were characterized through X-ray diffraction (XRD), thermal (DSC) and thermogravimetric analisys (TG). The atomized powder thermogravimetric analysis curve shows three intervals associated with the mass loss and it is typical of clay commercial application.

Characterization of Slate Powder Wastes from Minas Gerais - Brazil

2020 ◽  
Vol 848 ◽  
pp. 10-19
Author(s):  
Luciana Boaventura Palhares ◽  
Claudio Gouvêa dos Santos ◽  
Felipe Binda ◽  
Tim Nie Hunter
Keyword(s):  
Thermal Analysis ◽  
Raw Materials ◽  
Minas Gerais ◽  
Complete Characterization ◽  
Building Construction ◽  
Crushed Rock ◽  
Sustainability Criteria ◽  
Powder Samples ◽  
Materials Used

Research and development related to the processing of recycled materials has grown progressively in recent times, as scientists endeavour to integrate sustainability criteria, depletion of natural resources, reducing the energy of technological processes involving extraction and processing of raw materials, etc. When it comes to processing slate, industries have to pass over several steps ranging from the extraction of rock blocks until the final products consisting of plates, leaving behind a considerable amount of waste in the form of a mud composed mainly of water, lubricants and crushed rock. This waste with no defined destination accumulates in yards, reservoirs and streams, affecting the environment. Slate powder has great prospects for recovery, recycling and further applications once it has chemical composition and components similar to raw materials used in ceramic and building construction industries. Therefore, a complete characterization of this powder is important and here we present some results of XRD, SEM, EDS, G3 morphology and thermal analysis of slate powder samples from the southeastern state of Minas Gerais in Brazil.

Chemical-Mineralogical and Microscopic Characterization of Clay Used as Raw Materials in Santa Gertrudes' Ceramic Pole

2016 ◽  
Vol 869 ◽  
pp. 191-194
Author(s):  
Carolina del Roveri ◽  
R.A. Cunha ◽  
Antenor Zanardo ◽  
Letícia Hirata Godoy ◽  
Maria Margarita Torres Moreno ◽  
...  
Keyword(s):  
Raw Materials ◽  
Microscopic Analysis ◽  
Major Elements ◽  
X Ray Diffraction ◽  
Ceramic Tiles ◽  
X Ray ◽  
Mineral Phases ◽  
Icp Ms ◽  
Materials Used

The Santa Gertrudes ́ Ceramic Polo is the Brazilian region with national and international prominence in the manufacturing of ceramic tiles. Some raw materials used by ceramic industry and coatings industries in this region were characterized in terms of chemical-mineralogical and microscopic view, in order to promote the best technological characterization of them. For this, chemical analysis of major elements and trace X-ray diffraction and microscopic analysis by SEM, TEM and Electron microprobe were performed by ICP-MS. The results showed that the raw materials commonly referred to as "clays" are actually constituted by various mineral phases, which directly influence the properties of the same ceramics. Also showed that, by virtue of this constitution, different formulations can be developed, using the best raw materials found in the region of Santa Gertrudes, SP.

Sign in / Sign up

Export Citation Format

Share Document