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:Semiconductor materials; sol-gel process; CeO2-TiO2 complex compound; XRD Rietveld analysis; rare earths; [全文内容正在添加中] ...Mid-Temperature Synthesis of CeO2-TiO2 Complex Compound and Its XRD Structure Study 陈林深1,吕光烈1,胡秀荣1 (1.Center of Measurement and Analysis, Zhejiang University, Hangzhou 310028, China) Abstract......
Rietveld法定量分析Al2O3-TiC复合陶瓷相含量 曹荐1,斯庭智2 (1.马鞍山钢铁股份公司中板厂,马鞍山,243002;2.安徽工业大学材料科学与工程学院,马鞍山,243002) 摘要:采用热压制备了纯Al2O3陶瓷和Al2O3-20wt%TiC复合陶瓷,引入XRD的Rietveld分析方法对纯Al2O3陶瓷和Al2O3-20wt%TiC复合陶瓷材料进行了定量相分析.通过Rietveld定量分析发现Al2O3-20wt%TiC复合陶瓷的相含量与原始粉末的配比基本一致.Rietveld方法的定量分析具有准确,高效和快捷等优点,此方法适用于复合陶瓷材料的定量分析. 关键词:Al2O3-TiC复合陶瓷; 定量相分析; Rietveld方法; [全文内容正在添加中] ......
谱拟合法对其物相组成进行了分析,并通过变温XRD对BaTiO_3相变进行了表征,Rietveld全谱拟合结果表明,该方法制备的BaTiO_3粉体在室温下是一种四方,立方混合相,质量分数分别为73.9%,26.1%.精修结果的数值判据分别为:加权剩余方差因子R_(wp)=5.93%,剩余方差因子R_p=4.78%,拟合优值S(Goodness of fit)=1.53.变温XRD研究表明所制备的BaTiO_3粉体具有四方到立方相的相变. 关键词:BaTiO_3; Rietveld全谱拟合法; 物相定量分析; 变温XRD; BaTiO_3; Rietveld method; quantitative phase analysis; temperature variable XRD; [全文内容正在添加中] ......
Rietveld法模拟测算稀土双相永磁合金中物相的含量 张久兴1,王宁1,王超群2,岳明1 (1.北京工业大学材料学院,北京,100022;2.北京有色金属研究总院,北京,100088) 摘要:用Rietveld法模拟计算稀土双相永磁合金Nd2Fe14B/α-Fe的X射线衍射谱(XRD), 并根据多相体模型与无标定量相分析法确定各物相的含量.此外, 通过结构精修也可以进一步提取诸如纳米晶尺寸等微结构信息.对一组快淬Nd2Fe14B合金经700 ℃和不同时间退火(晶化处理)的样品进行α-Fe含量的测定结果表明, 实测结果与实际工艺相吻合.该法可以推广应用于其他稀土双相永磁合金如Pr2Fe14B/α-Fe(或Fe3B)的相含量测定与微结构分析. 关键词:无标定量分析; Rietveld法; 稀土双相永磁合金; [全文内容正在添加中] ......
calculations are in agreement with XRD patterns analysis and HRTEM results. Key words: Ti-based alloy; phase transformation; fcc phase; Rietveld analysis; mechanical alloying 1 Introduction Titanium... and amorphous phases whose volume fraction varies as a function of Sn amount. (5) The Rietveld refinement of the XRD patterns reveals the presence of three crystalline phases, namely bcc phase, fcc phase......
Rietveld Refinement of New Ternary Compound Al14Dy5Si He Wei1,Zeng Lingmin1,Zhang Jiliang1 (1.Key Laboratory of Nonferrous Metals and New Processing Technology of Materials, Ministry of Education... Rietveld method from X-ray diffraction data. The R-factors of Rietveld refinement are Rp=0.091 and Rwp=0.120, respectively. The thermal dependence of the magnetization (M-T curves) for the compound......
nanostructural character of the formed Ag particles. Key words: electrodeposition; silver; dendrites; SEM; XRD 1 Introduction Because of the unique electrical, chemical and optical characteristics, the silver... electron microscopy (SEM) by the TESCAN Digital Microscopy-model VEGA3, Brno, Czech Republic. The X-ray diffraction (XRD) analysis of Ag particles was carried out using the Rigaku Ultima IV diffractometer......
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Rietveld 分析方法在钨冶金氧化物相定量分析中的应用 李娜娜1,王宁2,王超群2 (1.中南大学,长沙410083;2.北京有色金属研究总院,北京100088) 摘要:用Rietved分析方法模拟计算钨冶金氧化物相如WO2.9,WO2.72和WO3等的标准X射线衍射(XRD)谱图,并根据多相体模型定量分析法--无标定量相分析确定蓝色氧化钨粉中各相的含量.该法具有简捷方便,并能给出全谱概念,省时省事,有其优越性,建议推广应用于钨冶金及硬质合金材料的物相定量分析. 关键词:Ritveld法; 钨冶金; 氧化物相; 无标定量分析; [全文内容正在添加中] ......
Sb2O3的Rietveld法定量相分析 曾令民1,黄纪蓉1 (1.广西大学物理科学与工程技术学院材料科学研究所,南宁,530004) 摘要:用Rietveld法对含有立方和正交两种晶型的Sb2O3样品进行了定量相分析,该样品含立方晶型和正交晶型的Sb2O3分别为(质量分数)97.92%和2.08%.结果表明,用Rietveld法进行的定量相分析是非常有效和精确的. 关键词:三氧化二锑; 定量相分析; Rietveld法; [全文内容正在添加中] ......
