抄録
Xenotime-type RPO4 (R=Ho or Tm) powder was dry-pressed to disks and bars. The disks and bars could be sintered to the relative density ≥ 98% in air without cracking at 1400°C for R=Tm or 1550°C for R=Ho, depending on the grain size. Young's modulus, Poisson's ratio, linear thermal expansion coefficient (20-1000°C) and bending strength (20°C) of sintered xenotime-type RPO4 ceramics were 170 GPa, 0.299, 6.2×10-6/°C and 93 ± 25 MPa for R=Ho; 162 GPa, 0.303, 6.0×10-6/°C and 131 ± 37 MPa for R=Tm, respectively.
