| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that a sintered body having high flexural strength, high toughness and high translucency in combination is not obtained and a translucent alumina sintered body suitable for a dental material requiring both strength and sensuousness was not obtained in the conventional alumina sintered bodies. <P>SOLUTION: The translucent alumina sintered body having 4.5 MPa-m<SP>0.5</SP>fracture toughness, ≥350 MPa-m<SP>0.5</SP>flexural strength, and ≥60% all light transmittance (sample thickness: 1 mm) to a visible light having a wavelength of 600 nm is provided. The sintered body wherein sintered crystal grains are slender plate-like and/or columnar shape having an average aspect ratio of ≥1.5 and ≤15 μm average long axis length is preferred. <P>COPYRIGHT: (C)2009,JPO&INPIT |
