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Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method
| Content Provider | Scilit |
|---|---|
| Author | de Melo Costa, Ana Cristina Figueiredo Tortella, Edener Neto, Elias Fagury Morelli, Márcio Raymundo Kiminami, Ruth Herta Goldschmidt Aliaga |
| Copyright Year | 2004 |
| Description | The constant heating rate method employed in sintering studies offers several advantages over the isothermal method, particularly the fact that all the parameters that describe the sintering phenomena can be obtained from a single sample. The purpose of this work is to determine the parameters of sintering kinetics of nanosized Ni-Zn ferrite powders synthesized by combustion reaction. The nonisothermal sintering method was studied using a constant heating rate (CHR). The Ni-Zn ferrite powders, with average particle size varying from 18 nm to 29 nm, were uniaxially pressed and sintered in an horizontal dilatometer at a constant heating rate of 5.0 °C/min from 600 °C up to complete densification, which was reached at 1200 °C. The compacts were characterized by scanning electron microscopy (SEM). Experimental results revealed three different sintering stages, which were identified through the Bannister Theory. The shrinkage and the shrinkage rate analyzed showed a viscous contribution in the initial sintering stage, which was attributed to the mechanism of structural nanoparticle rearrangement |
| Related Links | http://www.scielo.br/scielo.php?script=sci_pdf&pid=S1516-14392004000400003&lng=en&nrm=iso&tlng=en |
| Ending Page | 528 |
| Page Count | 6 |
| Starting Page | 523 |
| ISSN | 15161439 |
| e-ISSN | 19805373 |
| DOI | 10.1590/s1516-14392004000400003 |
| Journal | Materials Research |
| Issue Number | 4 |
| Volume Number | 7 |
| Language | English |
| Publisher | FapUNIFESP (SciELO) |
| Publisher Date | 2004-12-01 |
| Access Restriction | Open |
| Subject Keyword | Materials Research Ni Zn Ferrite Nanopowders Zn Ferrite Constant Heating Heating Rate Sintering of Ni |
| Content Type | Text |
| Resource Type | Article |
| Subject | Mechanics of Materials Condensed Matter Physics Materials Science Mechanical Engineering |
