Recent additive manufacturing methods categorized by characteristics of ceramic slurries for producing dual-scale porous
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REVIEW ARTICLE
Recent additive manufacturing methods categorized by characteristics of ceramic slurries for producing dual‑scale porous ceramics Woo‑Youl Maeng1 · Hyun Lee1 Received: 15 July 2020 / Revised: 4 September 2020 / Accepted: 21 September 2020 © Korean Society of Medical and Biological Engineering 2020
Abstract Porous ceramics have been utilized in various fields due to their advantages derived from characteristics of ceramics and porous structure and they were produced by versatile fabricating methods. However, the adoption of differently scaled pores in the porous ceramics by conventional pore forming strategies which results in dual-scale porosity has been studied to combine the specific functional abilities of each scaled pore. Those proposed strategies were supplemented to the recent additive manufacturing methods for constructing complicated structure with precisely controlled fabricating conditions. In this review, we provide the researches creating dual-scale porous ceramics with additive manufacturing which utilized the ceramic slurries containing homogeneous solution of photocurable monomers and terpenes. Introduction of the basic way to prepare photocurable monomer and terpene incorporated ceramic slurries which are suitable for specific printing mechanism was firstly discussed. And based on the characteristics of slurries, lithography-based and extrusion-based method are discussed with the experimental results. Subsequently, the remaining challenges of the techniques are further discussed with suggesting potentially capable approaches to overcome the limitations. Keywords Dual-scale porous ceramics · Additive manufacturing · Slurry characteristics · Lithography · Extrusion
1 Introduction Porous ceramics are ceramics containing 15–90 vol% of pores which are characterized by advantages of ceramics (high mechanical properties, excellent thermal stability and corrosion resistance) and pores (extended surface area, roughened surface) [1–5]. These porous ceramics have been extensively utilized as insulator, electrode for battery and fuel cells, and biological applications. As electronic and thermal utilization, pores facilitate charge (electrons and ions) transport and disturb the heat transfer by trapped air inside pores [6, 7]. 3D bilayered solid-state electrolyte framework for high energy density lithium metal-sulfur batteries were produced via tape-casting method by Fu et al. [8]. They employed polymethylmethacrylate (PMMA) bead for generating pores inside the thick garnet layer which can * Hyun Lee [email protected] 1
Institute of Global Health Technology Research, Korea University, Seoul 02841, Republic of Korea
host the electrode material and liquid electrolyte. And application of that resulted in high sulfur loading, coulombic efficiency. As a way to reduce thermal conductivity, Han et al. investigated the effect of porosity to thermal conductivity of porous mullite ceramics [9]. Porous mullite ceramics prepared by combined gel-casting and microwave heating method exhibited pore
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