Sintering of magnetoplumbite
| Autor: | A.M. Gadalla, A.N. Mahdy |
|---|---|
| Rok vydání: | 1976 |
| Předmět: |
Surface diffusion
Materials science technology industry and agriculture Iron oxide Sintering Partial pressure equipment and supplies Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry.chemical_compound Volume (thermodynamics) chemistry Condensed Matter::Superconductivity Grain boundary diffusion coefficient Particle size Physics::Chemical Physics Composite material Shrinkage |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 1:326-329 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/0304-8853(76)90059-7 |
| Popis: | A limiting density was reached at each sintering temperature. It was difficult to fix the operating mechanism during the initial stage of sintering. More than one mechanism overlap. At low temperatures surface diffusion predominates and at higher temperatures or firing periods a shift occurs to volume, then to grain boundary diffusion. During the intermetiate sintering stage, a straight line relationship was obtained on plotting the density or shrinkage against log time. The sintering rate was found to be inversely proportional to the particle size and increased in compositions deficit in iron oxide and at lower oxygen partial pressures. |
| Databáze: | OpenAIRE |
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