Reaction synthesis of porous nano-structured mullite ceramic composites from alumina and zeolite-poor rock with enhanced strength and low thermal conductivity
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-09-16 |
| Journal | Results in Engineering |
| Authors | Jamal Eldin F. M. Ibrahim, Emese Kurovics, Mohammed Tihtih, Mohamed A. Basyooni, IstvƔn Kocserha |
| Institutions | SelƧuk University, University of Miskolc |
| Citations | 6 |
Abstract
Section titled āAbstractāPorous mullite-based ceramics have been developed using a mixture of zeolite-poor rock and alumina through mechanical activation and reactive sintering. The experimental findings demonstrate that the in-situ mullite growth may develop in a variety of shapes, including whiskers, nanofiber, nanonetwork and diamond-like particles. The XRD examination indicates that the samples sintered at 1500 Ā°C are mostly made of the mullite phase. The SEM photographs show that as the sintering temperature increases, the mullitization process takes place first in zeolite-poor rock particles, and subsequently, alumina combines with the silica-containing phase via a liquid-phase sintering mechanism to produce an interlocking network of extended secondary mullite. The effects of mullite formation and the sintering temperature on various properties of the sintered samples, such as their density, apparent porosity, thermal conductivity, strength, wear resistance, composition, morphologies, and microstructural characteristics of the sintered samples were studied. Increasing the sintering temperature from 1100 to 1500 Ā°C improved the different properties. The density increased from 1.9 to 2.1 g/cm3, thermal conductivity rose from 0.9 to 1.6 W/m.K, compressive strength escalated from 18.9 to 92.1 MPa, and worn material volume decreased from 2444 to 36.9 mm3 after a 5-min abrasion test.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2023 - Foam-gelcasting preparation and properties of high-strength mullite porous ceramics [Crossref]
- 2023 - Low-temperature synthesis of mullite by molten molybdenum trioxide assisted mesoporous aluminum source dissolution [Crossref]
- 2023 - Optimizing the fabrication conditions of monolithic mullite whisker membrane from kaolin and bauxite using the Taguchi method [Crossref]
- 2022 - Recycling of aluminum dross and silica fume wastes for production of mullite-containing ceramics: powder preparation, sinterability and properties [Crossref]
- 2023 - Effect of MoO3 addition on fly ash based porous and high-strength mullite ceramics: in situ whisker growth and self-enhancement mechanism [Crossref]
- 2019 - Preparation and properties of porous mullite ceramics with high-closed porosity and high strength from fly ash via reaction synthesis process [Crossref]
- 2020 - Examination of mullite ceramic specimens made by conventional casting method from kaolin and sawdust [Crossref]
- 2017 - Mullite whisker network reinforced ceramic with high strength and lightweight [Crossref]
- 2022 - Effect of mullite phase formed in situ on pore structure and properties of high-purity mullite fibrous ceramics [Crossref]
- 2018 - The formation mechanism of mullite whisker in the mullite fiber network [Crossref]