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多晶棒
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     SCF of good quality can be grown from the polycrystalrod,but the growth speed should be smaller than that from single crystal rod,and the bestspeeds are 0.2mm/min and 1.2mm/min respectively for the same constitution (lat.% Nd:YAG).
     实验发现,长出较好的单晶光纤需二次生长,先用较快的提拉速度将粉末压制棒生长成陶瓷多晶棒,随后从多晶棒生长出单晶光纤。 但其最佳生长速度远比以单晶为源棒生长单晶光纤的速度小(从1.2mm/min 减小到0.2mm/min)。
短句来源
     The magnetostrictive rods of polycrystal and directional solidification crystal with composition Tb0.27Dy0.73Fe1.9 were prepared with the equipments and techniqes developped by ourselves.
     本文用自行设计的实验装置与工艺研制出Tb0.27Dy0.73Fe1.9磁致伸缩多晶棒和定向晶棒。
短句来源
     Single Crystal Fibers Growing from Polycrystal and Superfined Powder Rods
     从多晶棒、粉末棒生长单晶光纤
短句来源
  相似匹配句对
     Single Crystal Fibers Growing from Polycrystal and Superfined Powder Rods
     从晶棒、粉末棒生长单晶光纤
短句来源
     TRACKING OF MULTIPLE TARGETS
     目标跟踪
短句来源
     Multiple target Tracking
     目标跟踪
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The growth of single crystal fiber (SCF) from sintered powder rod and polycry-stal rod by LHPG method is studied.SCF of good quality can be grown from the polycrystalrod,but the growth speed should be smaller than that from single crystal rod,and the bestspeeds are 0.2mm/min and 1.2mm/min respectively for the same constitution (lat.% Nd:YAG).The optimum coefficient of molten zone shape for polycrystal source rod is smallerthan that for crystal source rod.and it is proved that this is an efficient,economical...

The growth of single crystal fiber (SCF) from sintered powder rod and polycry-stal rod by LHPG method is studied.SCF of good quality can be grown from the polycrystalrod,but the growth speed should be smaller than that from single crystal rod,and the bestspeeds are 0.2mm/min and 1.2mm/min respectively for the same constitution (lat.% Nd:YAG).The optimum coefficient of molten zone shape for polycrystal source rod is smallerthan that for crystal source rod.and it is proved that this is an efficient,economical andpractical way to the search for new crystal materials.

研究了用激光加热基座(LHPG)法从粉末压制成型的源棒直接生长单晶光纤的规律。通过显微镜观察直径波动及通过对吸收谱、荧光谱的测试来判断单晶光纤的品质。实验发现,长出较好的单晶光纤需二次生长,先用较快的提拉速度将粉末压制棒生长成陶瓷多晶棒,随后从多晶棒生长出单晶光纤。但其最佳生长速度远比以单晶为源棒生长单晶光纤的速度小(从1.2mm/min 减小到0.2mm/min)。实验还发现,以多晶为源棒所对应的熔区形状系数 C 比以单晶为源棒的小;另外,该法生长的单晶光纤的光谱性能与大块晶体的光谱性能相同。

The magnetostrictive rods of polycrystal and directional solidification crystal with composition Tb0.27Dy0.73Fe1.9 were prepared with the equipments and techniqes developped by ourselves. The growing and sizes of the grains of the rods with grain - oriented crystal have been examined using optical microscopy. We have,been measured the cuire temperature、magnetization curve、 magnetomechanical coupling coefficient、Young's mudulus, sound velocity, resonant frequency and quality factor of the Tb0.27Dy0.73Fe1.9 rods....

The magnetostrictive rods of polycrystal and directional solidification crystal with composition Tb0.27Dy0.73Fe1.9 were prepared with the equipments and techniqes developped by ourselves. The growing and sizes of the grains of the rods with grain - oriented crystal have been examined using optical microscopy. We have,been measured the cuire temperature、magnetization curve、 magnetomechanical coupling coefficient、Young's mudulus, sound velocity, resonant frequency and quality factor of the Tb0.27Dy0.73Fe1.9 rods. Some of magnetic properties are compared between the polycrystalline rods and rods gained by directional solidification. The effects of grain orientation on magnetostrictive properties of the rod with composition Tb0.27Dy0.73Fe1.9 have been discussed. At 732.11KA/m, the strains of the polycrystalline rods and directionally solidified rods are 1250ppm and 1610ppm respectively. The effective magnetomechanical coupling coefficients of the polycrystalline rod and directionally solidified rods are 0.85 and 0.92 respectively. The magnetostrictive properties of the Tb0.27Dy0.73Fe1.9 alloy were improved significatly by orientable solidification.

本文用自行设计的实验装置与工艺研制出Tb0.27Dy0.73Fe1.9磁致伸缩多晶棒和定向晶棒。用光学金相检验了定向晶棒的晶粒生长情况、晶粒大小与分布。测量了Tb0.27Dy0.73Fe1.9棒的居里温度、磁化曲线、磁致伸缩、机电耦合系数、弹性模量、共振频率及品质因素。比较了多晶棒与定向晶棒的磁性参数,讨论了晶粒定向对Tb0.27Dy0.73Fe1.9合金的磁致伸缩特性的影响.732.11kA/m磁场时,多晶棒和定向晶棒的磁致伸缩系数 分别是1250ppm和1610ppm.多晶棒和定向晶棒的有效机电耦合系数分别是0.85和0.92.定向结晶后,Tb0.27Dy0.73Fe1.9合金的磁致伸缩特性明显提高。

 
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