Ceramics-Silikáty 61, (1) 40 - 44 (2017) |
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COMPACTION OF LITHIUM-SILICATE CERAMICS USING SPARK PLASMA SINTERING
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Kubatík Tomáš František, Lukáč František, Mušálek Radek, Brožek Vlastimil, Stehlíková Květa, Chráska Tomáš
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Institute of Plasma Physics CAS, Za Slovankou 1782/3, 182 00 Prague, Czech Republic
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Keywords: Li₂Si₂O₅ , Li₂SiO₃ , Spark plasma sintering (SPS), Quantitative Rietveld refinement, X-ray diffraction (XRD)
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This paper deals with the compaction of ceramics based on lithium-silicate by spark plasma sintering (SPS). The initial powder was prepared by calcination in a resistance furnace at a temperature of 1300 °C with the ratio of Li/Si = 1. Compacting by SPS was carried out at temperatures of 800 - 1000 °C with a maximum pressure of 80 MPa. Samples with open porosity of less than 1 % were prepared at the temperature of 1000 °C. According to the quantitative Rietveld refinement of x-ray diffraction data, the dominant phases in all samples were Li₂Si₂O₅ and Li₂SiO₃, together representing over 80 wt. % of the sintered material. |
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doi: 10.13168/cs.2016.0058
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