Engineering of tailored secondary oxide raw materials for sustainable solar heat absorber and storage media

分散的化学成分是使用可持续的二次原材料制造工程材料的障碍。在这项研究中，它的目的是建立和评估一种科学的方法，使以冶金残渣和可回收精细陶瓷为添加剂的工程二次原料能够有针对性地合成。作为一个使用案例，通常在有色冶金中产生的铁闪石副产物和陶瓷加工残渣应作为具有特定热、光和结构特性的陶瓷颗粒的二次资源进行研究，这些陶瓷颗粒被开发为聚光太阳能发电厂(CSP)中的耐高温吸收器和存储介质。陶瓷加工残渣(氧化锆和二氧化钛)将作为掺杂剂添加到铁钛矿型火法冶金副产物中，以调整结晶过程和冶炼过程的产物，旨在改善功能性能。材料设计和合成包括适当的掺杂/熔炼/冷却和随后的热处理工艺，并伴随着热化学模型。表征包括衍生工程化新陶瓷的相结构和微结构演变以及热物理性能。性能将与由未经改性的原材料制备的最先进的陶瓷颗粒进行比较，以比较新的方法。热力学模型和实验结果将结合起来验证这项研究的假设，并设计一个通用的、集成的模型工作流程，将冶金副产品转化为附加值的人造矿物。

Scattering chemical composition is an obstacle for the employment of sustainable, secondary raw materials for the manufacturing of engineering materials. In this research, it is aimed to establish and assess a scientific methodology enabling the targeted synthesis of engineered secondary raw materials from metallurgical residues and recycled fine ceramics as additives. As a use case, fayalitic byproducts, commonly generated in nonferrous metallurgy, and ceramic processing residues shall be investigated as secondary resources for ceramic particles with specific thermal, optical and structural properties which are developed as high-temperature resistant absorber and storage media in concentrated solar power plants (CSP). Ceramic processing residues (ZrO2 and TiO2) will be added as dopants to the fayalitic pyrometallurgical by-products to tune the crystallization process and products of smelting process aiming to improve functional properties. Material design and syntheses include adapted doping/smelting/cooling and subsequent heat treatment processes, accompanied by thermochemical modelling. Characterization includes phase- and microstructural evolution as well as thermo-physical properties of derived engineered new ceramics. Properties will be compared with the state-of-the-art ceramic particles prepared from unmodified raw materials in order to compare the new methodology. Thermodynamic modelling and experimental results will be combined to validate this research's hypotheses and to design a generalized, integrated model workflow to transform metallurgical by-products into value added artificial minerals.