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微构分析XRD应用实例：蒙脱石
微构分析 XRD应用实例 蒙脱石
2011/10/28
蒙脱石的用途多种多样，蒙脱石黏土具有优良的理化性能以及催化性、触变性和润滑性等，因而可作为粘结剂、悬浮剂、增强剂、增塑剂、增稠剂、出编辑、絮凝剂、稳定剂、净化脱色剂、填充剂、催化剂、载体、填料等，广泛应用于冶金、机械制造、钻探、石油化工、轻工、农林牧和建筑等方面。
多相固体材料XRD全谱拟合相定量分析
多相固体材料 XRD全谱 拟合相定量
2011/10/25
在单色X射线照射下，多相体系在衍射空间的散射总量是各组成相散射分量的叠加，每个组成相的散射分量和其在多相体系中的丰度与单位晶胞中内原子的种类，数量，及粒子对射线吸收衬度有关，是一不变量，吸收衬度又与各组成相对射线的线吸收系数和颗粒尺寸有关。但每个相中的hkl衍射强度随单位散射体内原子或分子团精细结构及微结构的变化而变化，并不是一个不变量。基于标准样的单一hkl或hkl族衍射的内标法、K值法的相丰度...
固体材料XRD全图拟合相定量分析
凹凸棒矿物 固体材料 XRD全图 相定量分析
2011/10/17
固体材料的相定性分析和相定量是多晶衍射分析中常用的二大主要任务。上世纪九十年代计算机搜配（profile-based search/match）方法问世以来，以往那种费神、繁琐的三强线，八强线线搜配相鉴定被高效率的计算机全谱搜配所取代，检索的准确性和速度大幅提高，至少在主要物相的鉴定分析上 ,多相固体材料的物相鉴定在各实验室已变得相对容易。
微构分析XRD 应用实例：凹凸棒石（Attapulgite）
微构分析XRD 应用实例 凹凸棒石 Attapulgite
2011/10/17
凹凸棒土素有“千土之王” 的称号，它具有特殊的纤维结构、不同寻常的胶体和吸附性能，具有广泛的应用领域，在工业和其它多种行业上具有特种用途。1860 年， 在乌拉尔坡缕缟斯克(Palygorsk)矿区的热液蚀变带中发现了该矿物，外貌像马粪，1862 年其据产地命名；1913 年正式命名为Palygorskite，即坡缕缟石、坡缕石。1935 年， 命名为Attapulgite，即凹凸棒石。坡缕缟石（...
Characterization of Intercalated Smectites Using XRD Profile Analysis in the Low-Angle Region
Montmorillonite Profile Analysis Smectite XRD
2011/12/2
Abstract: X-ray diffraction (XRD) characterization of natural and intercalated smectites is usually limited to the apparent d-value estimated from the peak maxima in the raw data. This can lead to the...
XRD Measurement of Mean Thickness, Thickness Distribution and Strain for Illite and Illite-Smectite Crystallites by the Bertaut-Warren-Averbach Technique
Crystallite Fundamental Illite Particles Illite Illite-Smectite MacEwan Crystallites Mixed-Layer Clay Thickness Distributions Warren-Averbach Method
2011/12/2
Abstract: A modified version of the Bertaut-Warren-Averbach (BWA) technique (Bertaut 1949, 1950; Warren and Averbach 1950) has been developed to measure coherent scattering domain (CSD) sizes and stra...
XRD Measurement of Mean Crystallite Thickness of Illite and Illite/Smectite: Reappraisal of the Kubler Index and the Scherrer Equation
Crystal Thickness Illite Illite/Smectite Kubler Index Mixed-Layer Crystals Scherrer Equation XRD
2011/12/22
Abstract: The standard form of the Scherrer equation, which has been used to calculate the mean thickness of the coherent scattering domain (CSD) of illite crystals from X-ray diffraction (XRD) full w...
Quantification Curves for XRD Analysis of Mixed-Layer 14A/10A Clay Minerals
Biotite Chlorite Interstratification Mixed-layer quantification Vermiculite
2011/12/28
Using theoretical profiles of diffracted X-ray intensity for interstratification between layers having d-spacings around 14.3 侌 and 10.1 侌, a series of diagrams was derived from which the proportion o...
A Chemical, XRD, and 27Al MAS NMR Investigation of Miocene Gulf Coast Shales with Application to Understanding Illite/Smectite Crystal-Chemistry
Burial diagenesis Gulf Coast Illite/smectite Miocene NMR
2011/12/30
This study assesses the distribution of Al and Fe in mixed-layer illite/smectites (I/S) in shales undergoing burial diagenetic changes, using evidence from 27Al NMR, XRD, and chemical analyses. Sample...