Detail publikace

Processing and properties of fine-grained transparent MgAl2O4 ceramics

MACA, K. TRUNEC, M. CHMELÍK, R.

Originální název

Processing and properties of fine-grained transparent MgAl2O4 ceramics

Anglický název

Processing and properties of fine-grained transparent MgAl2O4 ceramics

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

Dokumenty

BibTex


@article{BUT44028,
  author="Karel {Maca} and Martin {Trunec} and Radim {Chmelík}",
  title="Processing and properties of fine-grained transparent MgAl2O4 ceramics",
  annote="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.",
  address="Institute of Chemical Technology in Prague and Academy of Sciences of the Czech Republic",
  chapter="44028",
  institution="Institute of Chemical Technology in Prague and Academy of Sciences of the Czech Republic",
  journal="Ceramics-Silikáty",
  number="2",
  volume="51",
  year="2007",
  month="january",
  pages="94--97",
  publisher="Institute of Chemical Technology in Prague and Academy of Sciences of the Czech Republic",
  type="journal article in Web of Science"
}