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OwnerTatsuhiro Sato, Nobumasa Yoshida +1inventors
InventorsTatsuhiro Sato, Nobumasa Yoshida, Akira Fujinoki
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An object of the present invention is to provide a transparent ceramics which exhibits favorable slope efficiency well comparable to that of a single crystal when employed in solid lasers, yet having a uniform quality and internally free from pores, foreign matters, or granular structures. Another object of the present invention is to provide a production method therefor. The above problems have been overcome by a transparent YAG—ceramics (YAG: Y3Al5O12) the physical properties thereof is improved by doping a metallic element, provided that the concentration of the doped metallic elements is in a range of from 0.1 to 20% by weight, that the concentration of nitrogen is 500 ppm or lower, that said ceramics has pores and foreign matters accounting for less than 100 mm2 per 100 cm3 as expressed by their projected area, and that it has an internal transmittance for visible radiations of 50 %/cm of higher. The metallic element for doping the YAG—ceramic is Nd.
1) A transparent ceramics the physical properties thereof is improved by doping a metallic element, provided that the concentration of the doped metallic elements is in a range of from 0.1 to 20% by weight, that the concentration of nitrogen is 500 ppm or lower, that said ceramics has pores and foreign matters accounting for less than 100 mm2 per 100 cm3 as expressed by their projected area, and that it has an internal transmittance for visible radiations of 50%/cm or higher.
6) A method for producing a transparent ceramics, comprising preparing a slurry by mixing and dissolving a nitrate compound of a metallic element, a dispersant, and a ceramic powder in pure water;
Dependencies are inferred from the claim text.