公开(公告)号：US20070186844A1

公开(公告)日：2007-08-16

申请号：US11609626

申请日：2006-12-12

Applicant: Andreas Weisleder ,  Matthias Mueller ,  Joerg Kandler ,  Andreas Menzel ,  Rainer Guett

Inventor： Andreas Weisleder ,  Matthias Mueller ,  Joerg Kandler ,  Andreas Menzel ,  Rainer Guett

IPC: C30B15/00 ,  C30B19/00 ,  C30B23/00

CPC classification number: C30B11/00 ,  C30B29/12

Abstract: A method for producing high-purity, large-volume monocrystals that are especially radiation-resistant and have low intrinsic birefringence. From a melt of crystalline raw material, with controlled cooling and solidification, a crystal is generated. As the crystalline raw material, shards and/or waste from already-grown crystals is used, and the re-used raw material 1) upon visual observation in daylight has no color; and 2) upon illumination with a white-light lamp in a darkroom a) has no or at maximum a just barely perceivable reddish and/or bluish fluorescence; and b) has no or at maximum a just barely perceivable diffuse scattering; and c) has no or only slight discrete scattering of at maximum two visually perceivable scattering centers per dm3. In this way, crystals can be obtained which after tempering have a BSDF value of

Abstract translation: 一种生产高纯度，大容量单晶的方法，特别是耐辐射和具有低固有双折射。 从结晶原料的熔体中，通过控制冷却和固化，产生晶体。 作为结晶原料，使用已经生长的晶体的碎片和/或废物，并且在日光下目视观察时，再利用的原料1）没有颜色; 和2）在暗室中用白光灯照明时a）没有或最多只有几乎不可察觉的淡红色和/或蓝色荧光; 和b）没有或最多只有几乎不可察觉的漫射散射; 和c）在dm 3处没有或仅有最大两个视觉上可感知的散射中心的轻微的离散散射。 以这种方式，可以获得晶体，其在回火之后具有<7×10 -7 -7的BSDF值，在减去36次泽尼克系数<15×10 -8 -8之后的RMS均匀性 ，111方向的SDR-RMS值<0.2nm / cm。