Coloring and translucency mechanisms of Five dynasty celadon body from Yaozhou kiln

Shi, Pengfei; Wang, Fen; Wang, Yi; Zhu, Jianfeng; Zhang, Biao; Fang, Yuan

doi:10.1016/j.ceramint.2017.05.334

Cited by 12 publications

(7 citation statements)

References 16 publications

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“…This is in accordance with a ternary phase diagram TiO 2 , FeO, Fe 2 O 3 [47]. In theory, pseudobrookite should disintegrate during cooling, but in the course of short thermal treatment with relatively low kinetics of this transformation, some remnants of the mentioned phase may remain in the fired material [46,48]. Pseudobrookite can form a solid-state solution with ferropseudobrookite (Mg 2+ ,Fe 2+ ,Al 3+ ,Fe 3+ )Ti 4+ 2 O 5 [49,50].…”

Section: Discussionsupporting

confidence: 82%

“…On the other hand, the investigations performed by Shi et al [46] demonstrated that a high content of Fe 2 O 3 and TiO 2 in the raw material encourages the formation of a metastable pseudobrookite phase (Fe 3+ ,Fe 2+ ) 2 (Ti,Fe 3+ )O 5 coexisting with rutile in the course of the firing. This is in accordance with a ternary phase diagram TiO 2 , FeO, Fe 2 O 3 [47].…”

Section: Discussionmentioning

confidence: 99%

“…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.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

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: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…7). FeO contents of the bodies of well-known later northern celadons such as Yaozhou, Ru and Jun wares made in the Tang, Song and Jin dynasties (7-13 th century, Shi et al 2017, Ding et al 2013, 2014) are significantly higher (1.9-3.0%) than those of the early northern celadons measured here, as are those of the Yue wares produced in South China (c. 1.7%, Xiong et al 2010), which usually produced grey or dark grey bodies (Fig. 7).…”

Section: Colorationmentioning

confidence: 99%

The introduction of celadon production in North China: Technological characteristics and diversity of the earliest wares

Huang

Freestone

Zhu

et al. 2020

Journal of Archaeological Science

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Celadon, technically a stoneware with a lime-rich glaze, had been produced in South China for more than two millennia before it was first made in the North in the second half of the sixth century. It appears to have been an immediate precursor to white porcelain, which was first produced by northern kilns. The compositions and microstructures of early northern celadons from kilns, residential sites and tombs in Shandong, Hebei and Henan provinces, and dated 550s-618 CE, have been determined by SEM-EDS. The majority of the vessels were made using a low-iron kaolinitic clay, with high alumina (20-29%), as anticipated for northern clays. A small number of celadon vessels from a kiln at Caocun, which produced mainly lead-glazed wares, have lower alumina contents and appear to have originated in the South. It seems possible that these imported vessels were being used by the potters as models on which Caocun wares were based. Consistent differences in major element composition are observed between the products of kilns at Anyang, Xing, Luoyang and Zhaili. Unlike southern celadon glazes, which were prepared as two-component mixtures of vegetal ash and body clay, the northern celadon glazes are three-component, and typically contained an additional siliceous component, probably loess. An exception is the glazes of the Xing celadons, which present no evidence for loess but which are rich in Na2O. The source of the soda is unclear, common salt and albitic feldspar are discussed as possibilities. Based upon micromorphological characteristics such as the relative size and abundance of remnant quartz and the extent of observable mullite, as well as the position of the glazes in the CaO-Al2O3-SiO2 phase diagram, the Xing bodies are more mature and they appear to have been fired to higher temperatures than the products of other kilns. These results suggest that celadon technology was not directly transferred to the North from the South, but that the northern potters adopted their own strategies to make high-fired glazes. Furthermore, each kiln appears to have had its own preferred recipe, to suit the available raw materials. The products of Xing kiln were exceptional and it appears that here the trajectory towards white porcelain was already apparent, perhaps reflecting the creativity of the Xing potters who were among the first to make a successful white porcelain.

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“…To overcome the limitations of personal experience, a lot of research on ceramics has been done. X-ray diffraction, scanning electron microscopy, and spectral analysis were usually carried out to discriminate ceramics [ 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. Another research area is based on the manufacturing process of ceramics, including firing temperature, raw material treatment, and glaze formula [ 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Dropout Deep Belief Network Based Chinese Ancient Ceramic Non-Destructive Identification

Huang

Guan

2021

Sensors

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A non-destructive identification method was developed here based on dropout deep belief network in multi-spectral data of ancient ceramic. A fractional differential algorithm was proposed to enhance the spectral details by making use of the difference between the first and second-order differential pre-process spectral data. An unsupervised multi-layer restricted Boltzmann machine (RBM) was employed to extract some high-level features during pre-training. Some weight and bias values trained by RBM were used to initialize a back propagation (BP) neural network. The RBM deep belief network was fine-tuned by the BP neural network to promote the initiative performance of network training, which helped to overcome local optimal limitation of the network due to the random initializing weight parameter. The dropout strategy has been put forward into the RBM network to solve the over-fitting of small sample spectral data. The experimental results show that the proposed method has excellent recognition performance of the ceramics by comparisons with some other ones.

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Coloring and translucency mechanisms of Five dynasty celadon body from Yaozhou kiln

Cited by 12 publications

References 16 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

The introduction of celadon production in North China: Technological characteristics and diversity of the earliest wares

Dropout Deep Belief Network Based Chinese Ancient Ceramic Non-Destructive Identification

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