000028748 001__ 28748
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000028748 0248_ $$aoai:doc.rero.ch:20120313113610-UY$$punifr$$ppostprint$$prero_explore$$particle$$zthesis_urn$$zreport$$zthesis$$zbook$$zjournal$$zcdu549$$zcdu16$$zpreprint$$zcdu1$$zdissertation$$zcdu34
000028748 041__ $$aeng
000028748 080__ $$a549
000028748 100__ $$aMaggetti, Marino$$uDepartment of Geosciences, Mineralogy and Petrography, University of Fribourg, Switzerland
000028748 245__ $$9eng$$aPaul-Louis Cyfflé's (1724-1806) search for porcelain
000028748 269__ $$c2011-12-01
000028748 520__ $$9eng$$aSeven unglazed figurines from private collections, attributed to Cyfflé's <i>Terre de Lorraine</i> manufacture in Lunéville (1766-1780), were subjected to porosity and scanning electron microscopic analyses to determine bulk element compositions and the composition and nature of their constituent phases. One figurine bears the mark CYFFLÉ À. LUNÉVILLE, three the mark TERRE DE LORRAINE. The studied samples pertain to four compositional groupings: (1) Two porous (18-20 % water adsorption W.A.) bodies containing milled quartz-rich frit + anhydrite (former gypsum) + phyllosilicate + Ca-rich matrix; (2) A soft-paste (artificial) porcelain body (10 % W.A.), containing quartz + calcic plagioclase (An₈₈₋₉₅) + glassy matrix. The latter is inferred to derive from a former frit. A coronitic, amorphous (as revealed by electron backscattered diffraction analysis) reaction rim is visible around the quartzes. The K-rich and Na-poor composition of the frit is best explained as a mixture of potassium nitrate, alum, calcined gypsum, sand, and moderate amounts of salt and soda; (3) A porous (23 % W.A.), hybrid porcelain body with finely milled particles of quartz, mullite-bearing hard-paste porcelain, Na-Ca-siliceous glass and metakaolinite; (4) Three hard-paste porcelain bodies, some with relict quartz, andesine plagioclase (An₃₇₋₄₅), pseudomorphs of kaolinite and the liquidus phase mullite in a glassy matrix. Well fired figurines have no W.A. due to the pervasive former melt phase, underfired figurines 7 %. These wares can contain small amounts of lead (1.8 wt% PbO) and SO₃ (0.6 wt%), suggesting the use of lead frit and gypsum. The diversity of Cyfflé's production is now better recognized. His trial-and-error experiments made use of a remarkably wide range of paste mixtures, with porcelain bodies in the French (soft-paste) and the German (hard-paste) tradition.
000028748 695__ $$9eng$$aTerre de Lorraine ; Paul-Louis Cyfflé ; soft-paste porcelain ; hard-paste porcelain ; Lunéville ; microchemical ; microstructural analysis ; technology
000028748 773__ $$g2011/23/6/993-1006$$tEuropean Journal of Mineralogy
000028748 775__ $$gPublished version$$ohttp://dx.doi.org/10.1127/0935-1221/2011/0023-2155
000028748 8564_ $$fmag_plc.pdf$$qapplication/pdf$$s670523$$uhttp://doc.rero.ch/record/28748/files/mag_plc.pdf$$yorder:1$$zpdf
000028748 918__ $$aFaculté des sciences$$bDécanat, Ch. du Musée 6A, 1700 Fribourg$$cGéosciences
000028748 919__ $$aUniversité de Fribourg$$bFribourg$$ddoc.support@rero.ch
000028748 980__ $$aPOSTPRINT$$bUNIFR$$fART_JOURNAL
000028748 990__ $$a20120313113610-UY