DSpace Coleção:https://ri.ufs.br/jspui/handle/riufs/228922026-08-11T10:00:57Z2026-08-11T10:00:57ZCaracterização de argilas calcárias utilizadas na produção de revestimentos cerâmicos no Estado de Sergipe - BrasilSantos, Cochiran Pereira dosOliveira, H. A.Oliveira, Rosane Maria Pessoa BetânioMacedo, Zélia Soareshttps://ri.ufs.br/jspui/handle/riufs/255992026-07-20T18:57:48Z2016-01-01T00:00:00ZTítulo: Caracterização de argilas calcárias utilizadas na produção de revestimentos cerâmicos no Estado de Sergipe - Brasil
Autor(es): Santos, Cochiran Pereira dos; Oliveira, H. A.; Oliveira, Rosane Maria Pessoa Betânio; Macedo, Zélia Soares
Abstract: This work aims to evaluate four different clays used in the production of BIIb type ceramic tiles in Sergipe State, Brazil. The clays
were characterized by X-ray diffraction, X-ray fluorescence, thermogravimetric analysis, differential thermal analysis, particle size
distribution, Atterberg limits and dilatometry. From the results, it was possible to detect calcite concentrations between 1.1 and
13.7% depending on the origin of the material. This information is essential for adjustments in the firing cycle and to predict the
minimum energy for sintering. Ceramic bodies were formed by uniaxial pressing of 28 MPa into rectangular bodies with dimensions
of 120 mm x 56 mm x 6 mm. These ceramic bodies were then fired at 1130 °C using a 23 min firing cycle and 3 min of soaking time.
Water absorption and modulus of rupture in bending were measured and the microstructure was investigated by electron scanning
microscopy. From the results, it was possible to observe a correlation between liquid phase formation and reduction of porosity in
ceramic bodies sintered at 1150 ºC. Activation energies of the sintering process were determined from the dilatometric tests and the
results showed that the decrease of calcareous content combined to the increase of flux content results in lower sintering temperatures,
which can lead to lower energy costs.2016-01-01T00:00:00ZCrystal structure of bis[N-phenyl-2-(1,2,3,4-tetrahydronaphthalen-1-ylidene) hydrazinecarbothioamidato-j2 N2 ,S] zinc dimethyl sulfoxide monosolvateSantana, Genelane CruzGimenez, Iara de FátimaNäther, ChristianJess, InkeOliveira, Adriano Bof dehttps://ri.ufs.br/jspui/handle/riufs/251232026-07-06T18:33:59Z2015-01-01T00:00:00ZTítulo: Crystal structure of bis[N-phenyl-2-(1,2,3,4-tetrahydronaphthalen-1-ylidene) hydrazinecarbothioamidato-j2 N2 ,S] zinc dimethyl sulfoxide monosolvate
Autor(es): Santana, Genelane Cruz; Gimenez, Iara de Fátima; Näther, Christian; Jess, Inke; Oliveira, Adriano Bof de2015-01-01T00:00:00ZMigração e deformações induzidas por diferentes hastes do tipo force-closed para ATQGriza, SandroGomes, Luiz Sérgio MarcelinoCervieri, AndréStrohaecker, Telmo Robertohttps://ri.ufs.br/jspui/handle/riufs/250772026-07-06T18:20:11Z2015-01-01T00:00:00ZTítulo: Migração e deformações induzidas por diferentes hastes do tipo force-closed para ATQ
Autor(es): Griza, Sandro; Gomes, Luiz Sérgio Marcelino; Cervieri, André; Strohaecker, Telmo Roberto2015-01-01T00:00:00ZCrystallographic aspects regarding the insertion of Ag+ ions into a hydroxyapatite structureSantos, Ivory Marcos Gomes dosBarbosa, Larissa Souza Noel SimasResende, Cristiane XavierSoares, Glória de AlmeidaSantos, Euler Araujo doshttps://ri.ufs.br/jspui/handle/riufs/247772026-03-13T17:47:04Z2015-01-01T00:00:00ZTítulo: Crystallographic aspects regarding the insertion of Ag+ ions into a hydroxyapatite structure
Autor(es): Santos, Ivory Marcos Gomes dos; Barbosa, Larissa Souza Noel Simas; Resende, Cristiane Xavier; Soares, Glória de Almeida; Santos, Euler Araujo dos2015-01-01T00:00:00Z