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Thermal Study of the Ceramic Pigments CoxZn(7−x)Sb2O12 |
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| Authors: | Gouveia D S Souza A G de Maurera M A M A da Costa C E F Santos I M G Prasad S de Lima J B Paskocimas C A Longo E |
| Institution: | 1.Departamento de Química, CCEN, Universidade Federal da Paraíba, 58059-900, Jo?o Pessoa, Paraíba, Brazil ;2.Departamento de Engenharia Química, CCT, Universidade Federal da Paraíba, 58109-970, Campina Grande, Paraíba, Brazil ;3.Ceramica Cordeiro do Nordeste S. A. BR-101, Km 96, 58322-000, Conde, Paraíba, Brazil ;4.LIEC – Departamento de Química, Universidade Federal de S?o Carlos, S?o Carlos/SP, Brazil ; |
| Abstract: | Using the Pechini method, pigments with spinel structure (Zn7Sb2O12)were synthesized by substitution of the cation Zn2+ by Co2+, in compounds with different concentrations of Sb2O3. The doping resulted in CoxZn(7–x)Sb2O12 phases(x=1–7) that were isomorphs to spinel, denominated as samples A and B. After thermal treatment at 400°C for 1 h, the powders were characterized by thermogravimetry(TG) and differential thermal analysis (DTA). The results indicate a different behavior whena higher amount of Sb2O3 is used, due to the presence of a secondary phase (ilmenite). This revised version was published online in July 2006 with corrections to the Cover Date. |
| Keywords: | ceramic pigment thermal analysis |
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