Mössbauer spectroscopic and chromaticity analysis on colorative mechanism of celadon glaze

Kim, Jong-Young; No, Hyunggoo; Jeon, A. Y.; Kim, Ungsoo; Pee, Jae-Hwan; Cho, Woo–Seok; Kim, Kyung Ja; Kim, Chin Mo; Kim, Chul Sung

doi:10.1016/j.ceramint.2011.05.141

Cited by 27 publications

(7 citation statements)

References 10 publications

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“…Numerous researchers have found that Fe can substitute Ti in the high-temperature melt due to the close ionic radii and valence states of these ions [46,51,52]. According to Kim et al [53], Ti 4+ enhances the stability of Fe 3+ relative to Fe 2+ in the glassy phase. This is in accordance with the previous work conducted on the redox equilibria of Fe-and Ti-bearing silica glasses, showing the structural instability of the Fe 2+ -O-Ti 4+ network [54].…”

Section: Discussionmentioning

confidence: 99%

Investigations of Feldspar-Quartz Raw Materials After Firing: Effect of Various Na2O/K2O Ratio and Synthetic Pigments Addition

Lewicka

Trenczek-Zając

2020

Minerals

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Different techniques (chemical analysis, X-ray diffraction, Mössbauer spectroscopy, UV-Vis-NIR spectrophotometry and chromaticity measurements) were used to study the color variation of feldspathic raw materials after firing at 1200 °C. Two varieties of feldspar-quartz grits (with Na2O or K2O prevalence) doped with synthetic pigments (hematite and rutile) were heat-treated in an oxidizing atmosphere. The results obtained indicate that the color of the ceramic body after firing may not only depend on the presence and analytical content of coloring elements (such as iron and titanium), but on their valence state and the chemical characteristics of the melt itself. The prevalence of larger alkali K+ ions over Na+ ions may cause the reduction of the coordination number of iron. This has a significant effect on the length of the Fe–O bond, which in turn influences the capacity for light absorption of a specific wavelength. The results of spectrophotometric measurements showed pronounced disparity between the raw materials and samples doped with coloring oxides. The introduction of synthetic pigments caused clear changes in the spectral dependence of the total absorbance. The absorbance increased in the whole measuring range, in particular in the visible part of the spectrum. Furthermore, a red-shift of the absorption bands towards longer wavelengths attributed to oxygen-metal charge transfer (OMCT) interactions between Fe3+ and O2− ions as well as to d-d transitions within Fe3+ ions was observed.

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Section: Discussionmentioning

confidence: 99%

Investigations of Feldspar-Quartz Raw Materials After Firing: Effect of Various Na2O/K2O Ratio and Synthetic Pigments Addition

Lewicka

Trenczek-Zając

2020

Minerals

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“…Nevertheless, the presence of iron and titanium gave rise to a range of green to blue colours (celadon) (Kim 2011) when fired under reducing conditions, or to a yellow colour when fired under oxidising conditions. Moreover, increasing the amount of iron and combining reducing and oxidising firings, different crystalline iron oxides precipitated, which were responsible for the red, orange and black colours.…”

Section: The Historical Development Geographical Distribution and Technological Advancesmentioning

confidence: 99%

Ceramic technology. How to characterise ceramic glazes

Pradell

Molerà

2020

Archaeol Anthropol Sci

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Glazes add value to ceramic; improve its appearance (colour and shine) and make it waterproof. Through the choice of colours and designs, glazes made ceramics fashionable, even luxurious, and therefore, an object of trade. Each region and ruling dynasty developed its own style or trademark which makes them particularly suitable for dating purposes. Therefore, the study and analysis of glazes offers direct information about the acquisition of technical skills (technology), trade of specific materials (inter-regional links), migrations and the introduction/adoption of new trends.

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“…In contrast, as the sintering temperature is increased in the reducing atmosphere, the whiteness is increased, because Fe 2 O 3 is reduced to FeO. [5][6][7] The whiteness is the lowest when the sintering is completed. When the temperature is continuously increased beyond the sintering point, the whiteness is increased by the appearance of the glass phase.…”

Section: Chromaticitymentioning

confidence: 99%

Properties of Kaolinite as a Raw Material for Porcelain

Kim¹,

Hwang²

2019

J. Korean Ceram. Soc

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In this work, we investigated kaolinite raw materials from China, Vietnam, and Seongju (Korea) used for the manufacture of porcelain products in Korea. According to chemical analysis results, for the kaolinites from Seongju, more feldspar components containing CaO, K 2 O, and Na 2 O are found than in those from China or Vietnam, of which the composition is close to that of pure kaolinite. Through X-ray Rietveld quantitative analysis, kaolinite and muscovite are found to be the main phases for all the raw materials. Halloysite, quartz, gibbsite, and andesine are found at more than 5% for KM-85 (China), LKC-60 (Vietnam), KC-009 (China), and WA (Seongju). Absorption rate is on order of LKC-60 < KC-009 < KM-85 < PA < WA, and the sample, sintered in reductive atmosphere, exhibits the lowest absorption rate. Comparing the color of the sintered samples, kaolinites of KM-85, LKC-60, and KC-009 (L * : 94-97%) show higher whiteness value than those of WA and PA (L * : 82-91%).

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Mössbauer spectroscopic and chromaticity analysis on colorative mechanism of celadon glaze

Cited by 27 publications

References 10 publications

Investigations of Feldspar-Quartz Raw Materials After Firing: Effect of Various Na2O/K2O Ratio and Synthetic Pigments Addition

Investigations of Feldspar-Quartz Raw Materials After Firing: Effect of Various Na2O/K2O Ratio and Synthetic Pigments Addition

Ceramic technology. How to characterise ceramic glazes

Properties of Kaolinite as a Raw Material for Porcelain

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