Effect of calcined colemanite additions on properties of hard porcelain body

Akpinar, S.; Evcin, Atilla; Özdemir, Yaprak Itır

doi:10.1016/j.ceramint.2017.03.178

Cited by 22 publications

(16 citation statements)

References 17 publications

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“…The results obtained in this study are comparable to those of our previous studies where wollastonite [35] and calcined colemanite [19] additives were used. When compared to the results obtained from the experimental studies with those of the data obtained by these two additives, the findings can be summarised as follows: With the addition of the surface-treated borax, the values of the water absorption and porosity in the porcelain samples that were fired at 1200 °C were lower than those of the porcelain bodies containing wollastonite and calcined colemanite additives that were fired at 1250 and 1275 °C.…”

Section: Surface Wettability Of the Surface-treated Abx Powderssupporting

confidence: 90%

“…The rheological behaviour of the suspensions has been known to play a crucial role in slip casting processing, and in turn, on the microstructure and properties of the final products. A well-dispersed slurry can be obtained by choosing a suitable dispersant and its critical quantity [19]. Therefore, rheological measurements were carried out to optimise the stabilisation conditions of the suspensions with different concentrations of dispersants by using a rotational stress-controlled rheometer (Anton Paar -MCR 102 model).…”

Section: Preparing the Porcelain Suspensionmentioning

confidence: 99%

“…These necessities have made the investigation of alternative raw materials inevitable, and there has been much research on new raw materials to be used in porcelain production [9]. In recent years, some primary and secondary raw materials, such as iron and steel slag [10], volcanic ash [11,12], mine waste [13], rice straw ash [14], sugarcane bagasse ash [15], diopside [16], glass waste [17], wollastonite [18], colemanite [19,20], and sandstone dust [21] have been used as alternative raw materials for porcelain production.…”

Section: Introductionmentioning

confidence: 99%

“…In the ceramic industry, borates are considered as one of the most important network-former after silica. Our previous studies [19,35] have shown that both additions of wollastonite (calcium silicate) and colema-nite (calcium borate) have a considerable effect of on the hard porcelain firing temperature. Therefore, the expectation is that by addition of sodium borate, as with calcium silicate and calcium borate, they will have a certain effect in the reduction of porcelain firing temperature and improvement in the mechanical properties, which has been a driving force in this work.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Surface-Treated Anhydrous Borax Additions on Hard Porcelain Properties

Akpinar¹

2019

Ceramics - Silikaty

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The utilisation of surface-treated anhydrous borax to facilitate densification of hard porcelain bodies, prepared by slip casting from suspensions containing mixtures of silicate-based raw materials, was investigated. After surface treatment with stearic acid, anhydrous borax powders were added to the initial mixture by partial substitution with potassium feldspars up to 3 wt. % to examine their potential effects on the finished product. By the addition of surface-treated borax to the suspensions, stabilised with different dispersants , hard porcelain bodies of high strength, which were fired at a lower temperature than the industrial firing temperature, were obtained. After studying the effects of the different amounts of surface-treated borax addition on the porcelain properties, it was found that the addition of borax causes distinct effects on the physico-mechanical properties of hard porcelain.The effect of surface-treated anhydrous borax additions on hard porcelain properties

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Section: Surface Wettability Of the Surface-treated Abx Powderssupporting

confidence: 90%

Section: Preparing the Porcelain Suspensionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Surface-Treated Anhydrous Borax Additions on Hard Porcelain Properties

Akpinar¹

2019

Ceramics - Silikaty

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“…From 338 to 417°C it takes place the endothermic processes of loss of structural water of different species, in particular for the Colemanite. This process occurs at 399°C as indicated Akpinar . Celik and Suner pointed that the rapid water losses cause an expansion of the Colemanite crystals that develops of uneven stresses.…”

Section: Resultsmentioning

confidence: 95%

Feasible glass‐melting process assisted by microwaves

Reinosa

García-Baños

Catalá-Civera

et al. 2019

Int J of Appl Glass Sci

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The advantages of microwave (MW) energy processing have been verified in the sintering of a ceramic frit at a pre-industrial scale. The challenge of achieving high temperature using MW energy at such dimensions was overcome and a mix of natural raw materials was heated until its fluxing point. Changes in dielectric properties of the raw materials mix were also measured in situ with the increase in temperature, being in accordance to thermal processes of a conventional heating process. The properties of the resulting ceramic frit were compared with the same frit obtained by the conventional sintering method. Both frits showed similar thermal behavior regarding DTA-TGA, heating microscopy and XRD (only glassy phase was present). A Raman study confirms the existence of the mentioned glass phase. The application of the frits as glazes were performed and their properties were studied. As a result, glazes with similar properties were obtained which confirms that the MW energy processed frit is suitable for its application as a ceramic glaze. K E Y W O R D Sceramic frit, ceramic glaze, CO 2 emissions, MW dielectric properties, MW energy, time saving

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Reformulating Ceramic Body Composition to Improve Energy Efficiency in Brick Manufacture

Wie-Addo

Jones

Palmer

et al. 2021

Springer Proceedings in Energy

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The influence of inorganic minerals (colemanite and nepheline syenite) as additives for sustainable clay brick manufacture has been examined. Each additive was added at 4 wt% to 96 wt% brick clay and samples were fired to 950 °C and 1040 °C and then compared with samples of 100% brick clay. Multiple analytical techniques (X-ray fluorescence, dilatometry, boiling water absorption, volumetric shrinkage, and mercury porosimetry) were used for analysis. Dilatometry shows that the additives influenced the temperature at which shrinkage began and the extent of that shrinkage. The use of colemanite reduced the temperature at which the shrinkage began by 120 °C and nepheline syenite reduced it by 20 °C. A linear shrinkage in dilatometry of 1% (from the maximum expanded length) was achieved at 1000 °C for 100% clay, 875 °C for colemanite additions and 970 °C for nepheline syenite additions. However, for samples fired at 1040 °C for 2 h colemanite containing samples had significantly lower volumetric shrinkage and higher water absorption than 100% clay and nepheline syenite samples, suggesting the presence of higher amounts of open porosity caused by the decomposition of the colemanite on heating. Samples containing nepheline syenite had a lower volumetric shrinkage but also a marginally lower water absorption than the 100% clay. The further optimisation of these or similar additives could potentially provide energy saving opportunities and reductions in CO2 emissions for brick manufacturers.

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Effect of calcined colemanite additions on properties of hard porcelain body

Cited by 22 publications

References 17 publications

The Effect of Surface-Treated Anhydrous Borax Additions on Hard Porcelain Properties

The Effect of Surface-Treated Anhydrous Borax Additions on Hard Porcelain Properties

Feasible glass‐melting process assisted by microwaves

Reformulating Ceramic Body Composition to Improve Energy Efficiency in Brick Manufacture

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