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  • Transparent fine-grained MgAl2O4 ceramics was prepared from nanometre-sized powder without any sintering additives. Ceramic green bodies were prepared by cold isostatic pressing and then pressureless presintered at temperatures of 1550-1600degC to reach closed porosity. Presintered samples were subsequently hot isostatically pressed (HIPed) at 1500degC and 200 MPa for 1 hour. The final density as well as the transparency of HIPed samples was affected by presintering densities. The highest final density (~100% t.d.) and highest in-line transmission (60.2% for sample thickness 1.1mm and = 632.8 nm) were obtained for sample presintered to the lowest density value still guaranteeing the structure with closed porosity (~94% t.d.). The HIPed sample had an average grain size of 1 micron and hardness HV=13.0 GPa.
  • Transparent fine-grained MgAl2O4 ceramics was prepared from nanometre-sized powder without any sintering additives. Ceramic green bodies were prepared by cold isostatic pressing and then pressureless presintered at temperatures of 1550-1600degC to reach closed porosity. Presintered samples were subsequently hot isostatically pressed (HIPed) at 1500degC and 200 MPa for 1 hour. The final density as well as the transparency of HIPed samples was affected by presintering densities. The highest final density (~100% t.d.) and highest in-line transmission (60.2% for sample thickness 1.1mm and = 632.8 nm) were obtained for sample presintered to the lowest density value still guaranteeing the structure with closed porosity (~94% t.d.). The HIPed sample had an average grain size of 1 micron and hardness HV=13.0 GPa. (en)
Title
  • Processing and properties of fine-grained transparent MgAl2O4 ceramics
  • Processing and properties of fine-grained transparent MgAl2O4 ceramics (en)
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  • Processing and properties of fine-grained transparent MgAl2O4 ceramics
  • Processing and properties of fine-grained transparent MgAl2O4 ceramics (en)
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  • RIV/00216305:26210/07:PU64719!RIV11-MSM-26210___
http://linked.open...avai/riv/aktivita
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  • Z(MSM0021630508)
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  • 2
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  • 444915
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  • RIV/00216305:26210/07:PU64719
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  • spinel ceramics, sintering, hot-isostatic pressing, microstructure, optical properties (en)
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  • CZ - Česká republika
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  • [5D218FDB1B6C]
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  • Ceramics-Silikáty
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  • 51
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  • Chmelík, Radim
  • Maca, Karel
  • Trunec, Martin
http://linked.open...ain/vavai/riv/wos
  • 000249498400005
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  • 0862-5468
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  • 26210
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