De l'origine du cobalt : du verre à la céramique

Gratuze, Bernard; Soulier, Isabelle; Blet, Maryse; Vallauri, Lucy

doi:10.3406/arsci.1996.939

Cited by 132 publications

(135 citation statements)

References 2 publications

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“…1560-1570), the presence of a considerable amount of arsenic was confirmed by previous PIXE analysis [6] and Raman signature was observed as such [9]. In fact, arsenic is a minor element commonly found in European cobalt ores: the Co/As ratio reaches 0.4 for the 16 th to 17 th century European glass and decreases to ~0.1 during the 18 th century [28,[51][52][53][54][55]. On the contrary, Asian cobalt ores are rich in manganese and iron [55][56][57][58] and require a firing under strong reducing atmosphere [59] to develop only the blue colour of Co 2+ ions [15].…”

Section: Pigmentssupporting

confidence: 50%

On-site Raman analysis of 17th and 18th century Limoges enamels: Implications on the European cobalt sources and the technological relationship between Limoges and Chinese enamels

Colomban

Arberet

Kırmızı

2017

Ceramics International

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International audienceLimoges enamels on metal from the 17th to 18th centuries were analysed by non-invasive Raman microspectrometry with a mobile set-up in storage at the Musée des Arts Décoratifs (Paris) in order to identify the types of glazes and pigments used and to compare them with those found in Chinese cloisonné and falangcai enamels painted on metal and porcelain from the Kangxi and Yongzheng reigns (Qing dynasty). Certain French Jesuit and Chinese historical records report exchanges of technical know-how and artefacts during this period from France to China. Particular attention is paid to the detection of lead arsenate in blue and white enamels as well as in the whitened ones. Lead arsenate appears to be formed in blue enamels due to the high arsenic content of European cobalt ores exploited during the period in question

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Section: Pigmentssupporting

confidence: 50%

On-site Raman analysis of 17th and 18th century Limoges enamels: Implications on the European cobalt sources and the technological relationship between Limoges and Chinese enamels

Colomban

Arberet

Kırmızı

2017

Ceramics International

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“…A cor azul é obtida pelo uso de óxido de cobalto, cujo minério utilizado como matéria-prima tem a particularidade de conter diferentes combinações de elementos químicos que podem ser relevantes para obter informação sobre a proveniência e datação [34][35][36][37]. Na colecção de azulejos TRL, os vidrados azuis apresentam diferentes combinações de elementos associados ao cobalto, maioritariamente CoFe-Ni-Cu.…”

Section: Cor Azulunclassified

Chemical, physical and mineralogical characterisation of the Hispano- Moresque tile collection from Lisbon Roman Theatre Museum

et al. 2017

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Palavras-chaveAzulejos hispano-mouriscos Vidrados plúmbicos Corpo cerâmico Composição química Características físicas Escavação arqueológica ResumoNeste trabalho estuda-se um conjunto de fragmentos de azulejos hispano-mouriscos do espólio do Museu de Lisboa -Teatro Romano. Apresenta-se a caracterização química e morfológica dos vidrados e do corpo cerâmico e a caracterização mineralógica deste último. Os vidrados são plúmbicos, sendo que os de cor branca e azul devem a sua opacidade a SnO 2 (4-11 %). As restantes cores apresentam teores de SnO 2 inferiores a 2 %. O corpo cerâmico é típico de pastas calcíticas, sendo os teores de CaO de 16-28 % e de Fe 2 O 3 de 4-5 %, este último responsável pela cor creme/ rosada. O estudo mineralógico permitiu identificar volastonite, calcite, diópsido e plagioclases cálcicas. Os resultados indicam que as temperaturas de cozedura foram geralmente próximas de 1000 ºC enquanto em alguns casos terão provavelmente estado mais perto dos 900 ºC. A caracterização física revelou valores de 30-42 % para a porosidade aberta, distribuição de tamanho de poros bimodal, absorção máxima de água de 16-26 % e coeficientes de absorção de água por capilaridade de 1,5-6,1 kg·m AbstractThis work intends to study a set of Hispano-Moresque tile fragments from the Lisbon Roman Theatre Museum collection. The chemical and morphological characterization of the glazes and the ceramic body was presented and also the mineralogical characterization of the latter. The glazes are plumbic, being the opacity of the white and blue colors due to SnO 2 (4-11 %). The other colors present amounts of SnO 2 lower than 2 %. The ceramic body is typical of calcite-based pastes with CaO between 16-28 % and Fe 2 O 3 between 4-5 %, the latter being responsible for the cream/ rose color. The mineralogical study identified wollastonite, calcite, diopside and calcic plagioclases. The results indicate that the firing temperature was generally around 1000 ºC while in some cases it was probably closer to 900 ºC. Physical characterization revealed values of 30-42 % for open porosity, a bimodal pore size distribution, a maximum water absorption of 16-26 % and a water absorption coefficient by capillarity of 1,5-6,1 kg·m

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“…EDS and μ-PIXE analysis show that all the blue enamels belong to the Co-As-Ni-Bi group identified by Gratuze et al (1992Gratuze et al ( , 1996. The cobalt ore used to produce the enamel probably comes from the mining district of Schneeberg, Germany, which was exploited between the 16th and 18th centuries (Kunckel, 1752).…”

Section: Blue Enamelmentioning

confidence: 99%

Swiss Stained-Glass Panels: An Analytical Study

et al. 2017

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Abstract:The history and iconography of Swiss stained glass dating between the 16th and 18th centuries are well studied. However, the chemical and morphological characteristics of the glass and glass paints, particularly the nature of the raw materials, the provenance of the glass, and the technology used to produce it are less well understood. In this paper, we studied two sets of samples from stained-glass panels attributed to Switzerland, which date from the 16th to 17th centuries: the first set comes from Pena National Palace collection, the second from Vitrocentre Romont. The aims were to identify the materials used in the production of the glass, to find out more about their production origin and to characterize the glass paints. Both glass and the glass paints were analysed by particle-induced X-ray emission; the paints were additionally analysed by scanning electron microscopy-electron-dispersive X-ray spectroscopy (SEM-EDS). The results show that the glass from both sets was probably produced in the same region and that wood ash was used as a fluxing agent. Different recipes have been used to make the blue enamels. However, the cobalt ore used as a coloring agent in all of the blue enamels came from the mining district in Schneeberg, Germany.

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De l'origine du cobalt : du verre à la céramique

Cited by 132 publications

References 2 publications

On-site Raman analysis of 17th and 18th century Limoges enamels: Implications on the European cobalt sources and the technological relationship between Limoges and Chinese enamels

On-site Raman analysis of 17th and 18th century Limoges enamels: Implications on the European cobalt sources and the technological relationship between Limoges and Chinese enamels

Chemical, physical and mineralogical characterisation of the Hispano- Moresque tile collection from Lisbon Roman Theatre Museum

Swiss Stained-Glass Panels: An Analytical Study

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