Firing Behavior of the Clay Fraction of a Natural Kaolinitic Clay: Are They Different?

Vieira, Carlos Maurício Fontes; Monteiro, Sérgio Neves

doi:10.1590/1980-5373-mr-2019-0172

Cited by 9 publications

(3 citation statements)

References 13 publications

(18 reference statements)

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“…However, the lower percentage of Fe 2 O 3 was responsible to provide a lighter red color after sintering. In addition, it is possible to observe a relatively high percentage of Al 2 O 3 , which tends to increase the CB refractoriness, when compared to other clays used to produce roo ng tiles with recognized technical quality [32]. The loss on re (LoF) comes mainly from the dehydroxylation of the clay minerals and the gibbsite [33].…”

Section: Resultsmentioning

confidence: 99%

Heating rate effect during sintering on the technological properties of Brazilian red ceramics

Guimarães¹,

Delaqua²,

Azevedo³

et al. 2022

Int J Adv Manuf Technol

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Unbalanced energy consumption in the production of ceramic artifacts is responsible for considerable undesirable impacts, such as increased emissions of polluting gases, excessive consumption of fuel materials, land degradation and unpredictable nancial costs. By contrast, the practice of optimizing the ceramic sintering, which in associated with ring of high temperature, can result in increased productivity and reduced production costs preserving an environmentally friendly production system. Moreover, it allows further improvements in the quality of the nal product. This work compares the effect of different sintering cycles, with heating rates of 2, 15 and 30°C/min, on the technological properties of a Brazilian industrial clay ceramic body. Initially the clay ceramic specimens was characterized in terms of mineralogical, chemical and physical properties. Specimens were prepared by extrusion and red at temperatures of 800, 900 and 1000°C. The evaluated properties by standard tests were water absorption, post-ring linear shrinkage and exural strength. It was found that owing to sintering carried out at higher heating rates, red ceramic products with superior technological properties were obtained. This is an unprecedented conclusion for common clay ceramics produced in Brazil. Based on the promising obtained results it is evidenced, in a clear and detailed way, the bene ts of rapid sintering cycle application for conventional brick production.

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Section: Resultsmentioning

confidence: 99%

Heating rate effect during sintering on the technological properties of Brazilian red ceramics

Guimarães¹,

Delaqua²,

Azevedo³

et al. 2022

Int J Adv Manuf Technol

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“…On heat treatment of 1100 °C, the peak intensities of quartz and microcline decreased while the new peak of mullite (3Al 2 O 3 •2SiO 2 ) appeared at 26.26 according to JCPDS #15‐0776. This mullite phase was formed by a spinel‐type structure transformation and has amorphous silica as a by‐product, as shown in Equation () 25,26

\begin{matrix} true \\ right \underset{Spinel - type}{3 ((), 2 normalA l_{2} O_{3} • 3 Si O_{2})} \to \underset{Mullite}{2 ((), 3 normalA l_{2} O_{3} • 2 Si O_{2})} + \underset{Amorphous silica}{5 Si O_{2}} \end{matrix}

…”

Section: Resultsmentioning

confidence: 99%

“…This mullite phase was formed by a spinel-type structure transformation and has amorphous silica as a by-product, as shown in Equation ( 6). 25,26 3 (…”

Section: Phase Compositions Of Ceramic Samplesmentioning

confidence: 99%

Replacement of hydroxyapatite from chicken eggshell waste for ceramic properties improvement

Sangmala

Naemchanthara

Limsuwan

et al. 2021

Int J Applied Ceramic Tech

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The chicken eggshell waste from food processing was synthesized as the hydroxyapatite for fluxing agent replacement in ceramic manufacturing. The main fluxing agents in Thailand ceramic manufacturing are natural potash feldspar (k‐feldspar) and animal bone ash. To overcome the problems of inconstant properties and the lack of k‐feldspar, the hydroxyapatite from chicken eggshell waste was selected as fluxing agent for the enhancement of the ceramic product. In this work, the hydroxyapatite with 0, 5, 10, and 15 wt% was replaced with the k‐feldspar in the ceramic samples. The results revealed the physical and mechanical properties of the ceramic samples with various hydroxyapatite contents were investigated after heat treatment in the temperature range of 1000–1200 °C. The ceramic samples added with hydroxyapatite have higher linear shrinkage and bulk density as compared with the ceramic sample without hydroxyapatite. The apparent porosity and water absorption decreased to near zero after the heat treatment at a temperature of 1200 °C. Moreover, the results showed that the physical properties affected the mechanical properties improvement after the hydroxyapatite addition and heat treatment process.

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Production of Ceramic Tiles with Glass Waste and Kaolinitic Clay

dos Santos,

Delaqua,

Vieira

2024

The Minerals, Metals &Amp; Materials Series

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Firing Behavior of the Clay Fraction of a Natural Kaolinitic Clay: Are They Different?

Cited by 9 publications

References 13 publications

Heating rate effect during sintering on the technological properties of Brazilian red ceramics

Heating rate effect during sintering on the technological properties of Brazilian red ceramics

Replacement of hydroxyapatite from chicken eggshell waste for ceramic properties improvement

Production of Ceramic Tiles with Glass Waste and Kaolinitic Clay

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