Publication result detail

Processing and properties of fine-grained transparent MgAl2O4 ceramics

MACA, K.; TRUNEC, M.; CHMELÍK, R.

Original Title

Processing and properties of fine-grained transparent MgAl2O4 ceramics

English Title

Processing and properties of fine-grained transparent MgAl2O4 ceramics

Type

WoS Article

Original Abstract

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.

English abstract

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.

Keywords

spinel ceramics, sintering, hot-isostatic pressing, microstructure, optical properties

Key words in English

spinel ceramics, sintering, hot-isostatic pressing, microstructure, optical properties

Authors

MACA, K.; TRUNEC, M.; CHMELÍK, R.

RIV year

2011

Released

01.01.2007

Publisher

Institute of Chemical Technology in Prague and Academy of Sciences of the Czech Republic

Location

Prague

ISBN

0862-5468

Periodical

CERAMICS-SILIKATY

Volume

51

Number

2

State

Czech Republic

Pages from

94

Pages to

97

Pages count

4

BibTex

@article{BUT44028,
  author="Karel {Maca} and Martin {Trunec} and Radim {Chmelík}",
  title="Processing and properties of fine-grained transparent MgAl2O4 ceramics",
  journal="CERAMICS-SILIKATY",
  year="2007",
  volume="51",
  number="2",
  pages="94--97",
  issn="0862-5468"
}