A Microstructural and Compositional Study of ε-Fe<sub>2</sub>O<sub>3</sub> Crystals in the Hare’s Fur Jian Ware
The Jian kilns in the present-day Jianyang County of Fujian Province are well known for their thick and lustrous black-glazed porcelain production. The hare’s fur (HF) glazed Jian wares characterized by radial fur-like strips, as one of the most typical representatives of black-glazed tea bowls, ori...
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MDPI AG
2022-03-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/3/367 |
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| author | Shiqian Tao Song Liu Yimeng Yuan Junqing Dong Qinghui Li |
| author_facet | Shiqian Tao Song Liu Yimeng Yuan Junqing Dong Qinghui Li |
| author_sort | Shiqian Tao |
| collection | DOAJ |
| description | The Jian kilns in the present-day Jianyang County of Fujian Province are well known for their thick and lustrous black-glazed porcelain production. The hare’s fur (HF) glazed Jian wares characterized by radial fur-like strips, as one of the most typical representatives of black-glazed tea bowls, originate from phase separation of glaze melt and crystallization of iron oxides. In this study, various techniques were performed on the yellowish-brown HF samples, including portable energy-dispersive X-ray fluorescence (PXRF), synchrotron X-ray absorption near-edge spectroscopy (XANES), optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy (RS). The objective of this study was to well understand the microstructure characteristics and chemical compositions of glaze patterns. Results showed that the main constituents of the ceramic glaze were alumina (10.61–16.43 wt.%), silica (62.20–77.07 wt.%), calcium (3.85–6.97 wt.%), and iron oxide (4.10–8.35 wt.%). The studies provided evidence that metastable epsilon-iron oxide crystals (ε-Fe<sub>2</sub>O<sub>3</sub>) formed on the brownish-yellow glazed surface. Microstructural analysis revealed that there were three types of crystal structures in the glaze surface: One consisted of well-grown leaf-like or dendritic-like structure with highly ordered branches at micrometers scales; another comprised flower-like clusters accompanied by branches radiating from the center, petals growing along the branches, and needles on both sides of the petals; the last type involved a honeycomb structure tightly packed with plentiful spherical or irregular-shaped particles. In addition, ε-Fe<sub>2</sub>O<sub>3</sub> crystals in the cross-section of the glaze showed a gradient distribution. |
| first_indexed | 2024-03-09T19:57:53Z |
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| language | English |
| last_indexed | 2024-03-09T19:57:53Z |
| publishDate | 2022-03-01 |
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| record_format | Article |
| series | Crystals |
| spelling | doaj.art-4e4dcef6a2294cab8ae30e200366a2112023-11-24T00:51:39ZengMDPI AGCrystals2073-43522022-03-0112336710.3390/cryst12030367A Microstructural and Compositional Study of ε-Fe<sub>2</sub>O<sub>3</sub> Crystals in the Hare’s Fur Jian WareShiqian Tao0Song Liu1Yimeng Yuan2Junqing Dong3Qinghui Li4Laboratory of Micro-Nano Optoelectronic Materials and Devices, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, ChinaLaboratory of Micro-Nano Optoelectronic Materials and Devices, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, ChinaLaboratory of Micro-Nano Optoelectronic Materials and Devices, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, ChinaLaboratory of Micro-Nano Optoelectronic Materials and Devices, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, ChinaLaboratory of Micro-Nano Optoelectronic Materials and Devices, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, ChinaThe Jian kilns in the present-day Jianyang County of Fujian Province are well known for their thick and lustrous black-glazed porcelain production. The hare’s fur (HF) glazed Jian wares characterized by radial fur-like strips, as one of the most typical representatives of black-glazed tea bowls, originate from phase separation of glaze melt and crystallization of iron oxides. In this study, various techniques were performed on the yellowish-brown HF samples, including portable energy-dispersive X-ray fluorescence (PXRF), synchrotron X-ray absorption near-edge spectroscopy (XANES), optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy (RS). The objective of this study was to well understand the microstructure characteristics and chemical compositions of glaze patterns. Results showed that the main constituents of the ceramic glaze were alumina (10.61–16.43 wt.%), silica (62.20–77.07 wt.%), calcium (3.85–6.97 wt.%), and iron oxide (4.10–8.35 wt.%). The studies provided evidence that metastable epsilon-iron oxide crystals (ε-Fe<sub>2</sub>O<sub>3</sub>) formed on the brownish-yellow glazed surface. Microstructural analysis revealed that there were three types of crystal structures in the glaze surface: One consisted of well-grown leaf-like or dendritic-like structure with highly ordered branches at micrometers scales; another comprised flower-like clusters accompanied by branches radiating from the center, petals growing along the branches, and needles on both sides of the petals; the last type involved a honeycomb structure tightly packed with plentiful spherical or irregular-shaped particles. In addition, ε-Fe<sub>2</sub>O<sub>3</sub> crystals in the cross-section of the glaze showed a gradient distribution.https://www.mdpi.com/2073-4352/12/3/367Jian warehare’s furepsilon-iron oxidemicrostructure |
| spellingShingle | Shiqian Tao Song Liu Yimeng Yuan Junqing Dong Qinghui Li A Microstructural and Compositional Study of ε-Fe<sub>2</sub>O<sub>3</sub> Crystals in the Hare’s Fur Jian Ware Crystals Jian ware hare’s fur epsilon-iron oxide microstructure |
| title | A Microstructural and Compositional Study of ε-Fe<sub>2</sub>O<sub>3</sub> Crystals in the Hare’s Fur Jian Ware |
| title_full | A Microstructural and Compositional Study of ε-Fe<sub>2</sub>O<sub>3</sub> Crystals in the Hare’s Fur Jian Ware |
| title_fullStr | A Microstructural and Compositional Study of ε-Fe<sub>2</sub>O<sub>3</sub> Crystals in the Hare’s Fur Jian Ware |
| title_full_unstemmed | A Microstructural and Compositional Study of ε-Fe<sub>2</sub>O<sub>3</sub> Crystals in the Hare’s Fur Jian Ware |
| title_short | A Microstructural and Compositional Study of ε-Fe<sub>2</sub>O<sub>3</sub> Crystals in the Hare’s Fur Jian Ware |
| title_sort | microstructural and compositional study of ε fe sub 2 sub o sub 3 sub crystals in the hare s fur jian ware |
| topic | Jian ware hare’s fur epsilon-iron oxide microstructure |
| url | https://www.mdpi.com/2073-4352/12/3/367 |
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