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Spectroscopic investigation of sintering of nanoparticles

纳米颗粒烧结的光谱研究

基本信息

批准号：
220123415
负责人：
Dr.-Ing. Thomas Wriedt
金额：
--
依托单位：
Fachgebiet Mechanische Verfahrenstechnik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/220123415?language=en
关键词：
Spectroscopic investigation sintering nanoparticles

项目摘要

Aggregates of nanoparticles demonstrate a high potential for industrial applications, e.g. for colour pigments, catalysts, gas sensors, fuel cells, solar cells or thermoelectric components. This potential is significantly influenced by the morphologic parameters of the produced particles. Here, the degree of sintering gets more and more into the focus. For example the degree of sintering can increase the mechanical stability, while complete sintering can lead to the loss of desired properties. Thus, an effective monitoring and control of the sintering process seems to be important.So far, mainly collision experiments are used to characterize the degree of sintering of aggregates. However, these methods cannot be used for process monitoring because of their lack of online capability. Therefore in this project we would like to investigate the possibilities of measuring the spectrally resolved transmission to characterize the degree of sintering within aggregates. By studies based on light scattering simulations the relation between the structural properties of the aggregates and their spectral behaviour will be investigated. This is done to collect information about how the degree of sintering can be determined from the measurement of spectral transmittance. At present, studying the shift of the maximum in the spectrum is considered to be a promising approach. Additionally, an appropriate experimental setup will be developed together with a corresponding strategy to validate the concept. The experimental setup will be erected and the proposed method will be tested for its capabilities and sensitivity. In summary, in this project we would like to investigate the possibilities to characterize the degree of sintering within aggregates of nanoparticles by measuring the spectral transmission.

纳米颗粒聚集体在工业应用中表现出很高的潜力，例如用于彩色颜料、催化剂、气体传感器、燃料电池、太阳能电池或热电组件。这种潜力是显着影响所产生的颗粒的形态参数。在这里，烧结程度越来越成为焦点。例如，烧结程度可以增加机械稳定性，而完全烧结可能导致所需性能的损失。因此，对烧结过程进行有效的监测和控制显得尤为重要。目前，主要采用碰撞实验来表征骨料的烧结程度。然而，这些方法不能用于过程监测，因为它们缺乏在线能力。因此，在这个项目中，我们想研究测量光谱分辨透射率来表征骨料内烧结程度的可能性。通过基于光散射模拟的研究，将研究聚集体的结构性质与其光谱行为之间的关系。这样做是为了收集关于如何从光谱透射率的测量确定烧结程度的信息。目前，研究谱中最大值的移动被认为是一种很有前途的方法。此外，将开发适当的实验装置以及相应的策略来验证该概念。将建立实验装置，并测试所提出的方法的能力和灵敏度。总之，在这个项目中，我们想研究的可能性，通过测量光谱透射率来表征纳米颗粒聚集体内的烧结程度。