Preparation of refractory cordierite using amorphous rice husk silica for thermal insulation purposes

Sembiring, Simon; Simanjuntak, Wasinton; Situmeang, Rudy; Riyanto, Agus; Sebayang, Kerista

doi:10.1016/j.ceramint.2016.02.062

Cited by 77 publications

(43 citation statements)

References 41 publications

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“…Preparation of silica sol was conducted following the procedures that have previously been applied 29,35 . In the first step, rice husk was washed with hot water to remove contaminants of water soluble organic matters present, and then dried in the room temperature.…”

Section: Preparation Of Silica and Magnesium Solsmentioning

confidence: 99%

“…Many attempts have been made to utilize rice husk silica to produce various silica based materials, such as production of nanosilica [25][26] , zeolites 27 , silica aerogel 28 . In our previous investigations, several ceramic materials derived from rice husk silica reported in literatures are borosilicate 29 , carbosil 30 , aluminosilicate 31 , mullite [32][33] and cordierite [34][35] .…”

Section: Introductionmentioning

confidence: 99%

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Effect of MgO-SiO2 Ratio on the Forsterite (Mg2SiO4) Precursors Characteristics Derived from Amorphous Rice Husk Silica

Sembiring¹,

Riyanto²,

Simanjuntak³

et al. 2017

Orient. J. Chem

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This study acquires the potential of rice husk silica for production forsterite precursors using sol-gel method. The samples preparation were conducted by mixing magnesium oxide sol from Mg(NO 3 ) 2 .6.12H 2 O with silica sol extracted from rice husk, with three different composition ratios of MgO to SiO 2 are 1:1, 2:3 and 3:2 by weight and sintered at 900 o C. The samples were characterized using Fourier transform infrared (FTIR) spectroscopy, x-ray diffraction (XRD),differential thermal analysis (DTA), followed by scanning electron microscopy (SEM). The FTIR results showed the presence of Si-O-Si, Mg-O and Mg-O-Si functional groups, which were associated with forsterite, enstatite, cristobalite and periclase, according to the XRD analysis. The formation of forsterite (Mg 2 SiO 4 ) is composition-dependent as revealed the increase of forsterite intensity after sintered at 900 o C in ratio 3:2. The surface morphology of non-sintered samples shows that particle and grain size were larger than particle and grain size of sintered samples. Also, SEM analysis of sintered samples clearly shows the presence of regular particle size with smaller grain size was found in ratio of MgO to SiO 2 is 3:2. DTA analysis revealed that the formation of forsterite increased with increasing temperature. In addition, the electrical resistivities of the samples were found in the range of 0.75 x 10 13 to 3.30 x 10 13 Ω-cm, demonstrating that the samples exhibit good potential as isolator.

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Section: Preparation Of Silica and Magnesium Solsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of MgO-SiO2 Ratio on the Forsterite (Mg2SiO4) Precursors Characteristics Derived from Amorphous Rice Husk Silica

Sembiring¹,

Riyanto²,

Simanjuntak³

et al. 2017

Orient. J. Chem

Self Cite

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“…Such materials have a low coefficient of thermal expansion and high heat resistance, which allows them to be used in various fields of engineering, for example, as a thermostable carrier of catalytic systems, lining plates in thermal devices operating up to 1400 °C, etc. In addition, such materials have high resistivity and low dielectric constant [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Preceramic Organomagnesium Oxanealumoxane Siloxanes

Щербакова

Pokhorenko

2019

The 23rd International Electronic Conference on Synthetic Organic Chemistry

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Organomagnesiumoxane alumoxane siloxane oligomers with different Al:Mg and Al:Si molar ratio have been synthesized through ethylacetoacetate alkoxyhydroxyalumoxane oligomers co-condensation with magnesium acetylacetonate and oligoethoxysiloxanes in organic solvents (alcohol, toluene) at a temperature of 70-100 °С within 3-6 h with the following solvent distillation. The physicochemical properties of the synthesized oligomers were studied. It is shown that with a molar ratio of Al:Mg ≈ 2 and Al:Si ≈ 1, oligomers have fiber-forming properties. The process of thermotransformation of organomagnesiumoxane alumoxane siloxanes into ceramic phases is investigated. It is found that pyrolysis results in the formation of multicomponent ceramics based on magnesium, aluminum, and silicon oxides, in particular, ceramics with a composition close to that of cordierite 2MgO·2Al2O3·5SiO2 (Mg2Al4Si5O18) or a mixed composition: magnesium-aluminum spinel and mullite. Therefore, the synthesized organomagnesiumoxane alumoxane siloxanes are preceramic oligomers and can be used as precursors for the preparation of various components (binders, impregnating compositions, fibers, ceramic powders) of high-purity ceramic composites based on magnesium, aluminum and silicon oxides.

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“…Silica can be used as galvanized coating as it contains high thermal stability [8]. By homogenizing the nano composite of the silica, this procedure really supports the coated material towards the heat resilience [9]. When silica gel is used for coating materials like already performed using a fan, the materials will eventually have a high flash point [10,11], thus by adding silica gel on certain material can increase the material property.…”

Section: Introductionmentioning

confidence: 99%

Characteristic of Silica Level (SiO3) Resulted from the Extraction of Rice Husk Ash with KOH Solvent towards the Amount of Heating Time

Wirawan¹,

Sutrisno²,

Ambarwati³

et al. 2018

IJET

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Silica is widely available in nature including the ones in the form of crystal granule, gel and colloid. Silica is known to have a higher boiling point than other materials. The production of silica gel from rice husk ash has a characteristic in the amount of silicone level which depends on its heating time during extraction. This research aims at increasing production of silicone element in rice husk ash extraction method using kalium hydroxide (KOH), with heating time variation during its solution, namely between 15, 30, 45 and 60 minutes. With an observation using EDS, the relationship of heating time toward the silicone level on the resulted material can be discovered. The 15-minute heating time contains the highest silicone level compared to the 30, 45 or even 60-minute heating time.

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Preparation of refractory cordierite using amorphous rice husk silica for thermal insulation purposes

Cited by 77 publications

References 41 publications

Effect of MgO-SiO2 Ratio on the Forsterite (Mg2SiO4) Precursors Characteristics Derived from Amorphous Rice Husk Silica

Effect of MgO-SiO2 Ratio on the Forsterite (Mg2SiO4) Precursors Characteristics Derived from Amorphous Rice Husk Silica

Synthesis of Preceramic Organomagnesium Oxanealumoxane Siloxanes

Characteristic of Silica Level (SiO3) Resulted from the Extraction of Rice Husk Ash with KOH Solvent towards the Amount of Heating Time

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