Heat storage technology is critical for solar thermal utilization and waste heat utilization. Phase change heat storage has gotten a lot of attention in recent years due to its high energy storage density. Nevertheless, phase change materials (PCMs) also have problems such as leakage, corrosion, and volume change during the phase change process. Ceramic-based materials with excellent corrosion resistance, good wettability to PCMs, and high thermal conductivity can efficiently compensate for the above drawbacks. Most importantly, ceramic-based composite phase change materials (CPCMs) can simultaneously utilize the latent heat of phase change materials and the sensible heat of ceramic-based materials to achieve high heat storage density. This paper systematically summarizes the preparation, characterization, and application of ceramic-based CPCMs. Firstly, the types, properties, advantages, and disadvantages of ceramic heat storage materials and PCMs are introduced, respectively. Then, the necessity of the composite of ceramic materials and PCMs is proposed. After that, the preparation methods and properties of ceramic-based molten salt, organic, and metal CPCMs are analyzed. Moreover, their applications in waste heat recovery, thermal management for buildings, solar thermal energy storage, and electronic heat dissipation are introduced. Finally, the existing problem and optimization direction of ceramic-based CPCMs are further discussed. 

Review on ceramic-based composite phase change materials: Preparation, characterization and application

The development of new materials based on hydroxyapatite has undergone a great evolution in recent decades due to technological advances and development of computational techniques The focus of this review is the various attempts to improve new hydroxyapatite-based materials First, we comment on the most used processing routes, highlighting their advantages and disadvantages We will now focus on other routes, less common due to their specificity and/or recent development We also include a block dedicated to the impact of computational techniques in the development of these new systems, including: QSAR, DFT, Finite Elements of Machine Learning In the following part we focus on the most innovative applications of these materials, ranging from medicine to new disciplines such as catalysis, environment, filtration, or energy The review concludes with an outlook for possible new research directions

https://www.mdpi.com/1420-3049/26/11/3190/pdf

Advanced Materials Based on Nanosized Hydroxyapatite

Energetic materials (EMs) are the core materials of weapons and equipment. Achieving precise molecular design and efficient green synthesis of EMs has long been one of the primary concerns of researchers around the world. Traditionally, advanced materials were discovered through a trial-and-error processes, which required long research and development (R&D) cycles and high costs. In recent years, the machine learning (ML) method has matured into a tool that compliments and aids experimental studies for predicting and designing advanced EMs. This paper reviews the critical process of ML methods to discover and predict EMs, including data preparation, feature extraction, model construction, and model performance evaluation. The main ideas and basic steps of applying ML methods are analyzed and outlined. The state-of-the-art research about ML applications in property prediction and inverse material design of EMs is further summarized. Finally, the existing challenges and the strategies for coping with challenges in the further applications of the ML methods are proposed.

/pdf/prediction-and-construction-of-energetic-materials-based-on-1dy719v5.pdf

Prediction and Construction of Energetic Materials Based on Machine Learning Methods

Experimental and theoretical characterization of Dy-doped hydroxyapatites

The demand for the swirl nozzle with enhanced temperature resistance and lightweight properties is increasing as the thrust-to-weight ratio of aero-engines rises. The Al2O3 ceramic swirl nozzle can maintain high strength in a hostile environment of high temperature and severe corrosion, while also meeting the requirements of aircraft to enhance efficiency and decrease weight. However, Al2O3 ceramics are limited in their application for aerospace components due to their poor thermal shock resistance (TSR) stemming from their inherent brittleness. This work reported an innovative design and fabrication strategy based on photopolymerization 3D printing technology to realize the three-dimensional shell structure through element interdiffusion and nanoscale stacking of the reinforced phase. With this strategy, a novel type of the new dual-structure Al2O3 ceramic composed of MgAl2O4 shell structure and matrix could be constructed in situ. The nano-sized MgAl2O4 caused a crack passivation effect after the thermal shock, which could improve the strength and TSR of 3D-printed Al2O3 ceramic. In addition, the effects of MgO content and sintering temperature on sintering behavior, flexural strength, porosity, and TSR of Al2O3 ceramics manufactured by digital light processing (DLP) processing were systematically studied. The optimum overall performance of Al2O3 ceramics was obtained at the sintering temperature of 1550°C and the MgO content of 1.0 wt.%, with a maximum flexural strength of 111.929 MPa and a critical temperature difference of 374.24°C for TSR. Based on the above research, an aero-engine swirl nozzle with high thermal shock resistance has been successfully prepared by ceramic 3D printing technology, which enhances high-temperature resistance and promotes lightweight design in aero-engine. 

Thermal shock resistant 3D printed ceramics reinforced with MgAl2O4 shell structure

Structural features modeling of substituted hydroxyapatite nanopowders as bone fillers via machine learning

The critical role of aggregate microstructure in thermal shock resistance and slag resistance of Al2O3–SiC–C castable

Effects of partial substitution of calcium alumino-titanate on the properties and microstructure of mullite–cordierite composites

Preparation and characterization of low-cost refractories for aluminum-melting-furnace linings from ferrotitanium slag

Effects of sintering temperature on the properties and the pore evolution of microporous MgAl2O4 aggregates

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