| 查看: 1009 | 回复: 2 | |||
| 【悬赏金币】回答本帖问题，作者大可乐hcl将赠送您 30 个金币 | |||
[求助]
如何通过xrd实验得到晶粒尺寸？xrd 实验中如何去除仪器展宽得到样品的半峰宽？ 已有1人参与
|
|||
|
最近在修改论文遇到了一个比较紧急的问题，在进行xrd测试时，仅仅测试了样品的xrd谱线。随后用得到的数据在jade软件上拟合处理，得出FWHM。但是期刊审稿人要求考虑仪器展宽的影响，得到样品本身的FWHM，再计算晶粒尺寸大小。这个问题该如何处理？大佬们有推荐的参考资料嘛？ @lich666 @jackdeng 发自小木虫IOS客户端 |
回复此楼» 猜你喜欢
zotero的advanced material模板没有更新，有人有新版的cls文件吗
已经有2人回复
-
【高校联合举办】2026年第五届服务机器人国际会议（ICoSR 2026）
已经有0人回复
-
无机化学论文润色/翻译怎么收费?
已经有281人回复
-
深圳大学化学与环境工程学院超分子团队招收2026级申请-考核制博士生
已经有8人回复
-
中南大学化学化工学院易小艺教授课题组招收2026级博士研究生（第二轮）
已经有0人回复
-
求助
已经有0人回复
-
0703化学26考研调剂，一志愿南昌大学
已经有2人回复
-
有没有化学、材料专业的同学需要调剂 考虑天津高效的可以邮件或者私信
已经有1人回复
-
26年博士招生
已经有15人回复
-
江西理工大学功能晶态材料方向刘遂军课题组招收2026年秋季入学博士研究生
已经有10人回复
rlafite
木虫 (正式写手)
- 应助: 190 (高中生)
- 金币: 9918.6
- 红花: 28
- 沙发: 1
- 帖子: 895
- 在线: 341.1小时
- 虫号: 4563202
- 注册: 2016-04-02
- 性别: GG
- 专业: 同步辐射技术及其应用
【答案】应助回帖
感谢参与，应助指数 +1
|
Williamson-Hall Method The Williamson-Hall (W-H) method is a technique used in X-ray diffraction (XRD) analysis to estimate crystallite size and microstrain within a material. It's based on the principle that peak broadening in XRD patterns is influenced by both the size of the crystallites and the strain within the crystal lattice. By plotting broadening parameters against diffraction angle, the W-H method allows researchers to differentiate between these two contributions and obtain quantitative values for both size and strain. Here's a more detailed explanation: 1. Peak Broadening in XRD: XRD patterns show peaks at specific angles (2θ) that correspond to the crystal structure of the material. These peaks have a certain width, which is influenced by both the instrument used for measurement and the material itself. Instrumental broadening is a fixed factor for a given setup, while sample-related broadening is caused by factors like small crystallite size and lattice strain. 2. Williamson-Hall Method: The W-H method focuses on separating the size-related and strain-related broadening components. It utilizes a plot where the x-axis represents sin θ (where θ is half of the diffraction angle 2θ) and the y-axis represents βcos θ (where β is the full width at half maximum (FWHM) of the diffraction peak). This plot is based on the equation: βcos θ = (Kλ/D) + 4εsin θ. β is the FWHM of the diffraction peak. θ is the Bragg angle. K is a dimensionless shape factor (typically around 0.9). λ is the wavelength of the X-ray radiation. D is the average crystallite size. ε is the microstrain. 3. Analyzing the W-H Plot: The plot should ideally be linear. The slope of the line represents the microstrain (ε). The y-intercept of the line provides information to calculate the average crystallite size (D). By analyzing the slope and intercept, researchers can estimate both the size of the crystallites and the strain within them. In essence, the W-H method provides a relatively simple way to extract information about the microstructure of materials from XRD data, specifically by separating and quantifying the effects of crystallite size and lattice strain |
2楼2025-07-08 23:02:09
rlafite
木虫 (正式写手)
- 应助: 190 (高中生)
- 金币: 9918.6
- 红花: 28
- 沙发: 1
- 帖子: 895
- 在线: 341.1小时
- 虫号: 4563202
- 注册: 2016-04-02
- 性别: GG
- 专业: 同步辐射技术及其应用
3楼2025-07-09 00:14:59
