晶体

In this study, AlGaN/GaN hetero-junction photo-transistors in detecting ultraviolet spectra have been fabricated and characterized. One of the HPTs features as low-temperature grown GaN insertion layer between based and emitter layers to reduce dark current. The internal gain and response time are also studied for the HPTs with and without the LT-GaN layer.

中文摘要本论文针对氮化镓/氮化铝镓系列异质接面光电晶体作为紫外光波段侦测器之相关制作与研究，包括於磊晶结构中有无插入一层低温成长氮化镓层之两种异质接面光电晶体，并比较其元件讯号放大效果以及响应时间的改变。

The two samples crystallized and annealed between 200 and 315℃ from the rubbery state or from the melt state exhi-bited a small endotherm peak at approximate 10 to 20℃ above the crystalliza-tion and annealing temterature and a large endotherm peak at 335 to 345℃.

在200—315℃结晶并退火热处理后，试样的DSC曲线上出现了两个吸热峰。低温吸热峰较小，并与结晶和退火温度Tc与在不同Tc下生成的不完整晶体的熔融和重结晶过程有关，而Tm的出现则与完整晶体的熔融过程有关。

As the supplement of the solidification theory, the melting tamperatures of nanocrystals, the glass transition temperatures of nanosized glasses, the ferromagnetic and ferroelectric transsition temperatures and the solid phase transition temperatures as well as the corresponding hysteresis of different materials are calculated and determined. The effect of the pressure on phase transition temperatures and the binary solution nanophase equilibrium diagram is constructed.

作为凝固理论的补充，计算和测定了纳米晶体的熔化温度，纳米玻璃的玻璃转变温度以及铁磁与铁电居里转变温度，纳米晶体的固态相变温度以及相关的动力学滞后，压力对相变温度的影响，二元无限互溶固溶体的纳米相图。

Recently Wang and Xiao discussed the excitation state energy of polaron in polyatomic crystals for the first time.

近年来国内外对多原子极性晶体中磁极化子性质的研究十分活跃，Zorkani等采用变分法计算了束缚磁极化子的基态能量，Kandemir等采用束缚朗道态讨论了二维大磁极化子的基态和第一激发态能量，国内一些学者采用微扰法和新颖算符法讨论了多原子极性晶体中表面和体磁极化子的性质。

Measuring transmission of this crystal, we discovered that its excited state absorption tended to be saturated.

在测量晶体透过率的实验中，发现Cr4+：YAG晶体的激发态吸收趋于饱和。

On the insertion of Li with low current density, the crystal structure is keeping original spinel; while with higher current desity or by thermal activation, owing to violent movement of Li~+ ions, part of crystal structure transforms into rock type similar to face—centered cubic structure of ferrous oxide.

结果表明，以较小电流密度嵌锂时，晶体结构保持原来的尖晶石型；当以较大电流密度嵌锂或热激活时，由于Li~+的运动加剧，部分晶体结构转变为类似于氧化亚铁的面心立方结构。

The values of photodamage resistance ability of In-doped series LiNbO3 crystals were obtained by the facula distortion method.

利用光斑畸变法得到掺In系列LiNbO3晶体的抗光损伤能力，发现在In3+掺入量高于阈值3%时的抗光损伤能力增强，比掺入量低于阈值的晶体高1～3个数量级。

According to the analytical expression, the phase grating of periodic and non-periodic system is calculated and the result keeps good agreement with that by fast Fourier transform, and the computation time is reduced up to 7 times comparing with fast Fourier transformation which is important to realize monitoring in situ in modern high-resolution technique.

3由以上解析式计算得到的晶体和非晶体的相光栅结果与快速傅立叶变换的结果一致，且能有效地缩短计算时间，这对于实现现代高分辨象的实时监测是很有意义的。

Based on the magnetic properties of the phase and on the effects of orientations and sizes of the crystallites, it has been inferred that the ζ-phase has a domain structure typical of uniaxial ferromagnetics with large magne...

基于相的基本磁性、晶体取向和尺度的討論推断，ζ相取典型单易磁化軸其磁各向异性很大的材料所具有的磁畴結构，但由于晶体尺度的限制，磁畴結构有所簡化而无釘形楔入畴。經粉碎的样品中，易見磁粉沉积区，认定其为单畴顆粒。

The fabrication and analysis of poly-Si thin film transistor and Si nanowires field effect transistor were studied in this thesis.

本论文是有关低温多晶矽薄膜电晶体与矽奈米线场效电晶体之制备与分析。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。