| 摘要 |
<p>Transparent, polycrystalline garnet bodies having desirable properties for use as laser material, luminescent x-ray scintillator materials and other uses are produced by mixing a chloride source solution of the desired cations with a basic ammonium solution to produce a precipitate having a substantially uniform composition which can be further processed to provide the desired transparent body. This precipitate is separated from the solution, dried, thermally decomposed at a temperature in the range from 700 to 1,000 DEG C, pressed to form a compact, isostatically pressed at up to 60,000 psi to provide a green, unsintered compact having a density in the vicinity of 55% of theoretic density. That green compact is then sintered in oxygen at a temperature between 1,400 and 1,700 DEG C to produce the desired transparent body. Alternatively, the compact may be sintered in oxygen at temperatures in the range from about 1,400 to about 1,600 DEG C to a closed pore stage and then hot isostatically pressed at high pressure to provide the desired transparent body. <IMAGE></p> |
