| Manufacturing and properties evaluation of Al2O3/ZrO2 granules derived from sodium alginate gelation |
| Maria Dolores Sosa Lucio1,2, Eun-Ji Oh1, Jang-Hoon Ha1, Jongman Lee1,2, Hong-Joo Lee1, Seung Hwa Jung3, Jun Young Shin3, In-Hyuck Song1,2 |
1Ceramic Materials Division, Korea Institute of Materials Science (KIMS), 797 Changwon-daero, Seongsan-gu, Changwon-si, Gyeongsangnam-do, 51508, Republic of Korea
2Department of Advanced Materials Engineering, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea
3R&D Center, Cenotec Co., LTD, 1256- 40, Hamma-Dearo, Gaya-Eup, Haman-Gun, Gyeongsangnam-do, 52035, Republic of Korea |
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Received: December 27, 2023; Revised: March 8, 2024 Accepted: March 24, 2024. Published online: April 17, 2024. |
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| ABSTRACT |
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Manufacturing and properties evaluation of Al2O3/ZrO2 granules derived from sodium alginate gelation
Spherical millimeter-sized ceramics with porous and dense microstructure are materials of interest in approaches related to catalytic supports and milling media. The reliability of these operations depends on key characteristics of these materials, including high sphericity to ensure efficient process designing, ease of handling, facile separation and/or recyclability, abrasion resistance, and uniform packing. This is accompanied by the structural stability and microstructure tailoring to secure its functionality. The Al2O3/ZrO2 system has been applied in powdered form for catalytic support applications, and in both porous and dense ceramics for structural applications, highlighting the performance and functionality of the Al2O3/ZrO2 system in these approaches. Based on this analysis, the present study explores the optimized preparation of spherical millimeter-sized Al2O3/ZrO2 granules along with the assessment of their microstructural, mechanical, and pore-related outcomes as a function of the heat treatment conditions. Optimized Al2O3/ZrO2 granules with high sphericity, processed through sodium alginate gelation at 900 °C and 1100 °C displayed a hierarchical macro/mesoporosity which can provide potential functionality for catalytic supports-related applications. In comparison Al2O3/ZrO2 granules similarly processed at a sintering temperature of 1600 °C exhibited a tailored mechanical strength and high relative density ensured by a refined microstructure, as well as a high sphericity which are features preferred for milling media applications. |
| Key words:
Al2O3/ZrO2 granules · Sodium alginate · Granulation · Sphericity · Porosity · Compressive strength |
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