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The better condition synthesizing the assorted minerals of zirconolite and sphene doping neodymium is holding 30 min at 1230℃, and the better formula is nCa(subscript 1-x/2-y/4 Zr(subscript 1-y/4);Al(subscript x/2) Ti(subscript 2-x/2O7): nCa(subscript 1-x NdAl Ti(subscript 1-x)SiO5[4/(4-y)]:1. Nd(superscript 3+) can enter crystal lattices of ite and sphene. Sphene can immobilize Zr(subscript 4+), Al(subscript 3+) and Nd(subscript 3+); Zr(subscript 4+) and Nd(subscript 3+) replace Ca(subscript 2+), and Al(subscript 3+) replaces Ti(subscript 4+). Zirconolite can immobilize Al(subscript 3+) and Nd(subscript 3+) Nd(subscript 3+) replaces Ca(subscript 2+) and Zr(subscript 4+), and Al(subscript 3+) and replaces Ti(subscript 4+).
研究表明:钙钛锆石和榍石组合矿物固化体较佳的合成条件是在1230℃条件下保温30min,较佳配方的摩尔比为nCa(下标 1-x/2-y/4 Nd(下标 x+y/2)Zr(下标 1-y/4)Al(下标 x/2)Ti(下标 2-x/2) O7:nCa(下标 1-x Nd Ti(下标 1-x)-SiO5=[4/(4-y)]:1;Nd(上标 3+)能够进入钙钛锆石和榍石晶格,榍石能够固溶Zr(上标 4+)、Al(上标 3+)、Nd(上标 3+),Zr(上标 4+)和Nd(上标 3+)取代Ca(上标 2+)位,Al(上标 3+)占据Ti(上标 4+)位,钙钛锆石能够固溶Al(上标 3+)、Nd(上标 3+),Nd(上标 3+)进入Ca(上标 2+)位和Zr(上标 3+)位,Al(上标 3+)占据Ti(上标 4+)位。
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Based on the laser longitudinal mode splitting theory, a novel scheme of dual-frequency laser with large frequency-difference is presented using electrically controlled birefringence of liquid crystal, and the transmitted resonant mode splitting by birefringent of Fabry-Perot etalon has been analyzed theoretically. A new element of liquid crystal Fabry-Perot etalon is designed and fabricated, which serves as aselector and splitter of both laser longitudinal modes and Fabry-Perot etalons transmitted resonant modes. Two different experimental systems of laser-diode end-pumped Nd:YAG laser have been set up using two different LDs, and the transmission of liquid-crystal cell have been measured. When the empty LCFP is inserted in the cavity of high-power LD pumped Nd:YAG laser, the oscillation of a single laser longitudinal mode have been observed, such a result shows that the designed and fabricated LCFP element is capable of selecting single axial mode. While an anti-reflected liquid crystal cell is inserted in the cavity of Nd:YAG laser end-pumped by the high-power LD, it is difficult to confirm weather the laser longitudinal modes have been spitted or not. The subject is summarized in this thesis and the improvement of the project has been presented.
论文以激光纵模的分裂理论为基础,提出了可望获得几十GHz甚至上百GHz的液晶电控双折射双频Nd:YAG激光器的总体方案,并对用双折射效应分裂F-P标准具透射谐振模进行了理论分析;设计并加工了一种集激光纵模选择、激光纵模分裂和F-P标准具谐振透射模分裂于一体的多功能元件——液晶电控双折射F-P标准具;建立了两种不同功率激光二极管端面泵浦的Nd:YAG激光实验系统,并对液晶盒的透射性质进行了测试;将未灌注液晶的空液晶F-P摘要标准具插入大功率LD泵浦Nd:、叭G激光谐振腔内,观察到了单纵模激光输出,说明所设计和加工的液晶F一P标准具具有纵模选择能力;将镀有增透膜的液晶盒插入大功率LD泵浦Nd八7AG激光谐振腔内,是否产生了激光纵模分裂现象还难以确定。
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Whereas, in the unrecovered sample which was heated by laser for short time, although the<001>∥ND subgrains growth could be observed, but the growing preference was not so sharp as that in the recovered case.
通过透射电镜对铜的微观亚结构形貌观察与取向分析表明,在初始晶粒为15μm、经88%冷轧的样品中发现,冷轧基体中存在清晰的亚晶粒间界,并存在<001>∥ND取向区域;<001>∥ND亚晶周围聚集有<011>∥ND、<112>∥ND和<123>∥ND取向亚晶;<001>∥ND亚晶内具有较低的位错密度,而其它取向亚晶位错密度相对较高。
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save it in a bank nd use judiciously:如果我是亿万富翁,我要
放假的话,我要...Game | 如果我是亿万富翁,我要save it in a bank nd use judiciously | 如果我是超人,我要rescue good people nd punish d bad
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Nd:脑袋
我是很愉快的猪(pic)画的这副兔(tu)子图画很热(re)门一(a)块肉(rou)掉在了牛顿(nd)的附近几(n)根头发在耳朵(ear)的旁边在(at)十(ten)个神仙(tion)的关心下,他功力大长想抽(sou)查我的脑袋(nd),这听起来太不可思
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Pay ma tithe nd enjoy life:如果我是亿万富翁,我要
放假的话,我要...Travel, sleep nd spnd tym wit ma homeboys | 如果我是亿万富翁,我要Pay ma tithe nd enjoy life | 如果我是超人,我要Be humble