发明名称 |
METHOD FOR PREPARING RARE-EARTH HALIDE BLOCKS, BLOCKS OBTAINED AND THEIR USE TO FORM SINGLE CRYSTALS AND SINGLE CRYSTALS OBTAINED THEREBY. |
摘要 |
<p>Production of polycrystalline blocks comprising at least 10 g of a rare earth metal halide (I) comprises heating a mixture or complex of a rare earth metal halide and an ammonium halide to form a melt and then cooling the melt. Having reached 300 degrees C, the temperature is never allowed to fall below 200 degrees C before melt formation. Production of polycrystalline blocks comprising at least 10 g of a rare earth metal halide of formula (I) comprises heating a mixture or complex of a rare earth metal halide and an ammonium halide to form a melt and then cooling the melt. Having reached 300 degrees C, the temperature is never allowed to fall below 200 degrees C before melt formation: AeLnfX(3f+e) (I) Ln = rare earth metal(s); X = Cl, Br or I; A = alkali metal(s); e = 0-3f; f = 1 or more. Independent claims are also included for: (1) polycrystalline block of at least 1 g (I) containing less than 0.1 wt.% water and less than 0.2 wt.% rare earth metal oxyhalide; (2) monocrystal produced by melting a block as above; (3) monocrystal of (I) containing less than 0.1 wt.% rare earth metal oxyhalide.</p> |
申请公布号 |
SI1567611(T1) |
申请公布日期 |
2008.08.31 |
申请号 |
SI20030031250T |
申请日期 |
2003.11.13 |
申请人 |
SAINT-GOBAIN CRISTAUX & DETECTEURS |
发明人 |
ILTIS ALAIN |
分类号 |
C04B35/515;C04B35/653;C09K11/77;C30B11/00;C30B29/10 |
主分类号 |
C04B35/515 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|