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Porous Refractories Synthesized Using Rice Husk and Rice Husk Processing Products.

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Title: Porous Refractories Synthesized Using Rice Husk and Rice Husk Processing Products.
Authors: Yefremova, Svetlana1 (AUTHOR) s_yefremova@cmrp.kz, Yermishin, Sergey1,2 (AUTHOR), Kablanbekov, Askhat1 (AUTHOR), Satbaev, Baimakhan2 (AUTHOR), Shalabaev, Nurgali2 (AUTHOR), Satbaev, Serik2 (AUTHOR)
Source: Materials (1996-1944). Nov2025, Vol. 18 Issue 21, p5063. 32p.
Subjects: Refractory materials, Porous materials, Rice hulls, Pyrolysis, Condensation reactions, Sustainability, Heat resistant materials, Thermal insulation
Abstract: In recent years, research in the field of the sustainable production of refractory ceramics has become topical. Significant attention has been paid to the use of secondary raw materials for obtaining high-quality materials. The purpose of the current study was to develop new high-temperature porous materials based on the magnesium sulfate-refractory clay–chamotte–aluminum system using environmentally friendly raw components. To synthesize porous refractories, rice husk and the by-products of its thermal processing were used as substitutes for ingredients usually introduced into the composition of high-temperature materials. Ground rice husk was used as both a burnout additive and a silica source. It was added to the mixture instead of chamotte. An organic condensate from rice husk pyrolysis was used as a binder. A sodium silicate solution, after activating pyrolyzed rice husk with alkali, was also tested as a binder. These liquid ingredients served as replacements for lignosulfonate and liquid glass. The new raw material components and the porous refractories obtained with their use were studied using methods of chemical analysis, XRD, GC-MS, TA, SEM, and EDS. Standard methods for studying the properties of refractories were used to evaluate the physicomechanical and thermal characteristics of the experimental materials. The sample with the maximum content of rice husk (14.4 wt.%) and organic condensate from its pyrolysis (10.5 wt.%) demonstrated promising properties as a light porous refractory: an apparent porosity of 44%, a volumetric weight of 1.1 g·cm−3, compressive strength of 2.1 MPa, tensile strength in bending of 4.5 MPa, bond strength of 0.01 MPa, thermal shock resistance of 155 thermal cycles, and thermal conductivity of 0.05 W (m·K)−1. It can be used as a prospective thermal insulating material. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Porous Refractories Synthesized Using Rice Husk and Rice Husk Processing Products.
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  Data: <searchLink fieldCode="AR" term="%22Yefremova%2C+Svetlana%22">Yefremova, Svetlana</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> s_yefremova@cmrp.kz</i><br /><searchLink fieldCode="AR" term="%22Yermishin%2C+Sergey%22">Yermishin, Sergey</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kablanbekov%2C+Askhat%22">Kablanbekov, Askhat</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Satbaev%2C+Baimakhan%22">Satbaev, Baimakhan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shalabaev%2C+Nurgali%22">Shalabaev, Nurgali</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Satbaev%2C+Serik%22">Satbaev, Serik</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Nov2025, Vol. 18 Issue 21, p5063. 32p.
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  Data: <searchLink fieldCode="DE" term="%22Refractory+materials%22">Refractory materials</searchLink><br /><searchLink fieldCode="DE" term="%22Porous+materials%22">Porous materials</searchLink><br /><searchLink fieldCode="DE" term="%22Rice+hulls%22">Rice hulls</searchLink><br /><searchLink fieldCode="DE" term="%22Pyrolysis%22">Pyrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Condensation+reactions%22">Condensation reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainability%22">Sustainability</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+resistant+materials%22">Heat resistant materials</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+insulation%22">Thermal insulation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In recent years, research in the field of the sustainable production of refractory ceramics has become topical. Significant attention has been paid to the use of secondary raw materials for obtaining high-quality materials. The purpose of the current study was to develop new high-temperature porous materials based on the magnesium sulfate-refractory clay–chamotte–aluminum system using environmentally friendly raw components. To synthesize porous refractories, rice husk and the by-products of its thermal processing were used as substitutes for ingredients usually introduced into the composition of high-temperature materials. Ground rice husk was used as both a burnout additive and a silica source. It was added to the mixture instead of chamotte. An organic condensate from rice husk pyrolysis was used as a binder. A sodium silicate solution, after activating pyrolyzed rice husk with alkali, was also tested as a binder. These liquid ingredients served as replacements for lignosulfonate and liquid glass. The new raw material components and the porous refractories obtained with their use were studied using methods of chemical analysis, XRD, GC-MS, TA, SEM, and EDS. Standard methods for studying the properties of refractories were used to evaluate the physicomechanical and thermal characteristics of the experimental materials. The sample with the maximum content of rice husk (14.4 wt.%) and organic condensate from its pyrolysis (10.5 wt.%) demonstrated promising properties as a light porous refractory: an apparent porosity of 44%, a volumetric weight of 1.1 g·cm−3, compressive strength of 2.1 MPa, tensile strength in bending of 4.5 MPa, bond strength of 0.01 MPa, thermal shock resistance of 155 thermal cycles, and thermal conductivity of 0.05 W (m·K)−1. It can be used as a prospective thermal insulating material. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/ma18215063
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 32
        StartPage: 5063
    Subjects:
      – SubjectFull: Refractory materials
        Type: general
      – SubjectFull: Porous materials
        Type: general
      – SubjectFull: Rice hulls
        Type: general
      – SubjectFull: Pyrolysis
        Type: general
      – SubjectFull: Condensation reactions
        Type: general
      – SubjectFull: Sustainability
        Type: general
      – SubjectFull: Heat resistant materials
        Type: general
      – SubjectFull: Thermal insulation
        Type: general
    Titles:
      – TitleFull: Porous Refractories Synthesized Using Rice Husk and Rice Husk Processing Products.
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            NameFull: Yefremova, Svetlana
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            NameFull: Yermishin, Sergey
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            NameFull: Kablanbekov, Askhat
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            NameFull: Satbaev, Baimakhan
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            – D: 01
              M: 11
              Text: Nov2025
              Type: published
              Y: 2025
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              Value: 18
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              Value: 21
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            – TitleFull: Materials (1996-1944)
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