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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A Comparative Study of Conventional and Microwave Sintering of BaCe1-xGdxO3-delta Ceramic

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Borges, K. C. M. [1] ; Goncalves, R. F. [2] ; Correa, A. A. [1, 3] ; La Porta, F. A. [4] ; Santos, M. R. C. [1] ; Godinho, M. J. [1, 5]
Total Authors: 6
[1] Univ Fed Goias, Campus Catalao, Ave Lamartine, BR-75704020 Catalao, Go - Brazil
[2] Univ Fed Sao Paulo, Rua Prof Artur Riedel 275, BR-09972270 Diadema, SP - Brazil
[3] Univ Fed Sao Carlos, LIEC, Rod Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil
[4] Univ Tecnol Fed Parana, Lab Nanotecnol & Quim Computac, Ave Pioneiros 3131, Londrina, PR - Brazil
[5] Univ Fed Sao Carlos, DEMA, Rod Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Inorganic and Organometallic Polymers and Materials; v. 28, n. 1, p. 130-136, JAN 2018.
Web of Science Citations: 0

The nanoparticles of BaCe1 - xGdxO3 - delta (BCGO) with x = 0.01 and 0.02 mol% Gd3+ respectively, were synthesized by the polymeric precursor method. The nanocrystals analyzed by X-ray diffraction (XRD) displayed an orthorhombic perovskite-type structure. The sintered samples were characterized using Archimedes method, field emission scanning electronic microscopy (FE-SEM), and dilatometric measurements are reported. The values obtained relative to the average crystallite sizes calculated by the Scherrer equation were found to be dependent on Gd dopant concentration in the samples under investigation. The samples were sintered via both conventional and microwave sintering methods at 1480 A degrees C for 4 h and at 1370 A degrees C for 1 h respectively. By applying a heating rate of 50 A degrees C min(- 1) in a microwave oven, a satisfactory final density (95.1% of the theoretical density) was obtained using relatively lower temperatures compared to the conventional method. Both sintering methods were successfully employed towards obtaining dense BCGO ceramic. Comparatively, however, domestic microwave sintering was found to bear advantages over conventional sintering. Among such advantages include rapid heating, selective material coupling in addition to the enhancement of reaction kinetics. These relevant merits, in essence, render microwave sintering suitably more attractive for the synthesis of diverse ceramic materials. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC