Rutile single crystal has been strongly interested because of its variability of physcal properties and particularity of photochemical characteristics afer it was artificially grown by c . h . moore in 1949 . it has been applied in opt - communication , solar light energy conversion and jewels Moore博士利用焰熔法首次人工合成了金红石单晶体以后,其多样的物理性质和独特的光化学性能逐渐被人们所认识,在宝石装饰、光通信以及光能转换等领域已经有了广泛的应用。
There are many different methods of growth cdse single crystals , but they have some deficiencies . in our study , the technique of the purification of starting materials had been improved : the purification of polycrystalline and growth of cdse single crystals had be carried on in the same quartz ampoule and starting materials had been transferred into the growth ampoule directly in the last process of purification , which avoided the extra contamination 由于制备具有高纯度和高电阻率的cdse单晶体非常困难:到目前为止,制备cdse单晶体的方法虽然很多,如溶液法、熔体法、温度梯度溶剂区熔法( tgsz )等,但是都因各自的不足而没有成为简便而理想的制备cdse单晶体的方法,所以cdse单晶体没有得到广泛的应用。
We suggest that regular tactic square shape with steps on the single crystal mgo and discontinuity of the au film may play an important role during the formation of regular arrays of gan nanorods . a new form of gan nanomaterial - nanotweezers has been obtained by chemical vapor deposition on the specially prepared cubic mgo ( 100 ) s Fe s 3 : m , edx , xa12 , tem和saed显示:纳米线是具有单斜晶系的尸gazo3单晶体,并且单根g七azo3纳米线根植于ag催化剂岛,形成了桥连于金属催化剂岛的纳米线阵列。
The as - grown crystals were characterization by cutting and directional , x - ray diffraction , high resolution ohmmeter , ir transmission spectroscopy , visible light absorption spectroscopy , scan electronic microscopy ( sem ) and positron annihilate time technique ( pat ) . the ir transmittance of czt single crystals grown with cd - riched is about 53 % , while 23 % with no cd riched 采用解理实验、 x射线衍射、电学性能测试、红外透过谱测试、可见光吸收谱测试、 sem蚀坑分析、探测器的试制等分析测试方法,并首次采用正电子湮没寿命谱分析方法来研究czt单晶体的空位缺陷,综合表征了所生长的晶体的质量和性能。
Under no excess pbo flux environment , the perovskite phase of pmnt single crystals were more stable than that of pznt , but it was found to be the decomposition of perovskite crystals into pyrochlore crystals at 1250 . the pure perovskite pznt crystals prepared by the pbo flux method were thermodynamically metastable 在无pbo条件下pmnt晶体较pznt晶体稳定,但在1250附近的高温下会发生向焦绿石相的分解反应; pznt单晶体是亚稳定的,在高温时亦分解生成焦绿石相和pbo 。
The other has two metal - insulator - semiconductor ( ms ) contacts with lower leakage current ( less than 4 pa , 300v ) and better energy resolution ( about 10 % fwhm for 241am 59 . 5kev line ) and poor working stability . in theoretical studies , the analysis on the phase equilibrium in the vapor growth of cdse single crystals shows that the stoichiometry of cdse crystals can be controlled effectively by controlling the stoichiometry of starting materials and the vapor growth temperature . besides , the investigation of the transporting properties of charge carries in cdse detectors indicates that the noise in energy spectrum detected by using the detectors with msm structure is caused by the hole injection , which is induced by electron injection and the light injection 本文把cdse单晶体的生长、单晶体的成分、单晶体的性能以及单晶体在室温核辐射探测器中表现出来的性能结合起来进行了比较系统的研究;采用垂直无籽晶气相提拉法生长出了电阻率为10 cm量级、尺寸为中10mm 30mm的单晶体;制备出了能量分辨率达10 ( fwhm ) (对~ ( 241 ) am59 . 5kev谱线而言)的cdse室温核辐射探测器,取得了较好的研究结果。
Based the eag - i etchant , a new etchant was developed , with which the etch pit pattern on ( 110 ) , ( 111 ) and ( 100 ) faces of czt crystals can emerge immediately and effectually . this pager investigated relation between the ( 110 ) faces of cutting from crystals conveniently and accurately by laser reflex method . by the surface treatment , the nuclear radiation detector was fabricated with ( 110 ) of czt crystal and strong 241am responsibility was observed 在改变e _ ( ag )腐蚀液的配方的基础上,研制了新的腐蚀液,可方便、快速、有效的显示czt不同晶面的缺陷蚀坑形貌;研究了利用激光正反射法和自然解理的不同( 110 )面之间的关系,方便、快速、准确的进行定向切割晶体的方法;采用生长的czt单晶体自然解理的( 110 )面,经过表面处理,试制了探测器元件,对24lam有较强的响应。
Cadmium selenide ( cdse ) single crystal is regarded as one of the most promising materials for room temperature nuclear radiation detectors , but cdse detectors have not been studied in detail because of the lack of high quality cdse single crystals and suitable technology for this semiconductor and the devices Cdse单晶体是最有前途的室温核辐射探测器材料之一,但由于没有制备出高质量的cdse单晶体,加上没有成熟的半导体材料加工技术与器件制作工艺,人们对cdse探测器没有进行深入的研究。
The blade ' s color depends on the nature of the jewel it springs from , and while its length is fixed in the case of a single jewel lightsaber , lightsabers equipped with multiple crystals can have their length varied by rotating a knob that allows the focusing crystal activator to subtly modify the refraction pattern between the gems 剑刃的颜色取决于源晶体的性质,尽管单晶体光剑的剑刃长度是固定的,装备有复合水晶的光剑可以通过旋动一个旋钮来移动聚焦晶体,来精确地调整晶体间的折射方式,从而随意改变刃长。