2025年1月1日 · In this study, we demonstrate the synthesis of beta tin (β-Sn) through monochromatic X-ray induced decomposition of tin oxalate (Sn 2 C 2 O 4) under ambient conditions, utilizing XRD and Raman spectroscopy for characterization.

2022年4月5日 · Here, we grow compressively strained α -Sn doped with 2-4 at.% germanium on a native oxide layer on a silicon substrate at 300–500 ∘ C. Growth is found to occur by a reversed β -Sn to α -Sn...

Sn is beta Sn structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Sn is bonded to six equivalent Sn atoms to form a mixture of distorted edge and corner-sharing SnSn6 pentagonal pyramids. There are four shorter (3.06 Å) and two longer (3.25 Å) Sn–Sn bond lengths.

In situ X-ray diffraction (XRD) was performed to study the formation of the α-Sn structure in nanocrystalline Sn-based electrodes during electrochemical lithium insertion and extraction at room temperature. Therefore, pure β-Sn nanoparticles were synthesised and …

2022年10月25日 · An experimental investigation is conducted by synchrotron X-ray diffraction (XRD) in a diamond-anvil cell (DAC) up to pressures and temperatures of 57 GPa and 730 K. Density functional theory (DFT) calculations are performed using both a local density approximation (LDA) and a generalized gradient approximation (GGA) functional.

2013年9月1日 · 通过 99.99% Sn 的晶种粉末样品的同步加速器 X 射线衍射研究 βSn（白锡）与 αSn（灰锡）的转化动力学。 对热膨胀行为的分析表明，转变的体积变化随着温度的降低而增加。

目前Sn-Beta分子筛的合成主要是Corma等报道的以正硅酸乙酯(TEOS)为硅源、脱铝纳米Beta沸石作为品种诱导、HF为矿化剂的水热晶化法;该方法存在合成时间长（10天以上）、环境污染严重、设备要求高、生产过程可操作性及重现性差等问题;难以规模化生产和工业化应用。

2013年7月22日 · The transformation kinetics of βSn (white tin) to and from αSn (grey tin) are studied by synchrotron X-ray diffraction of seeded powder samples of 99.99% Sn. An analysis of thermal expansion behaviour revealed that the volume change of transformation increases as the temperature decreases.

在相变过程中，新旧相中不同晶面的衍射强度变化存在一定的先后顺序，证实了锗的半导体相（金刚石立方结构）到金属相（β -Sn结构）的转变是位移型相变。 此外，通过与静态压缩X射线衍射数据的对比，证实了在此相变过程中不同晶面消失/出现存在先后顺序的行为只能通过动态压缩和动态探测手段观察。 Abstract: Germanium is a semiconductor with good performances of high carrier mobility and narrow band gap at ambient conditions.

采用XRD、SEM、FT-IR、UV-Vis、MAS NMR等表征方法对母体B-Beta及Sn-Beta沸石进行了表征，并考察了Sn-Beta沸石在葡萄糖异构化反应中的催化性能。 主要内容如下: 在无机碱和氟化物混合体系条件下，以TEAOH（四乙基氢氧化铵）为模板剂，白炭黑为硅源，B-Beta沸石为晶种，在 ...