SYNTHESIS AND PROPERTIES OF CERAMICS FROM FERRIC OXIDE NANOPOWDER

Read more Possibilities of receiving ceramics from the nanodisperse ferric oxide (II, III) powder are investigated. In a hot pressing facility (by Spark Plasma Sintering method) the ceramics with fine-grained (about 1 micron and less) structure made. Structure of the received ceramics is investigated by the method of scanning electronic microscopy. Radiographic examination of initial nanopowder and the received ceramics is also carried out. If in the phase relation the initial powder and the ceramics sintered at 800°С are magnetite Fe₃O₄ (75-1610), the ceramics sintered at 900°С – Fe₃O₄ (75-33), and at 1200°С the diffraction picture of a mixture of two phases – a iron protoxide FeO (46-1312) phase and a metal Fe (6-696) phase – took place. Microhardness of the ceramics was 8 GPa, ultimate compression strength – 0,8 GPa. Thereby availability of use of the SPS method is shown.

Keywords:
nanopowder, ceramics, strength, microhardness, sintering. 
УДК 538.9:621.002.3

SYNTHESIS AND PROPERTIES OF CERAMICS FROM FERRIC OXIDE NANOPOWDER