A novel method to low temperature synthesis of nanocrystalline forsterite

Saberi, Ali; Alinejad, Babak; Negahdari, Zahra; Kazemi, Faramarz; Almasi, Ali

doi:10.1016/j.materresbull.2006.07.020

Cited by 110 publications

(52 citation statements)

References 10 publications

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“…Forsterite is a crystalline magnesium silicate ceramic with chemical formula Mg 2 SiO 4 , which has a melting point at temperature around 1890 o C, good electrical insulation with value of electrical resistivity is 10 13 -10 15 Ω cm 1 , low thermal expansion, good chemical stability and excellent insulation properties even at high temperatures 2 , and makes its suitable for use in thermal insulation. In addition, forsterite has low dielectric constant ε» 6.8, making this material suitable for dielectric component for wave communication 3 .…”

Section: Introductionmentioning

confidence: 99%

“…These methods include solid-state reaction [7][8][9][10][11][12] , wet reactions 1,13 and sol-gel [14][15][16][17] . The production of forsterite through the solid-state reaction usually requires high temperature and long reaction time, while the sol-gel process can promote molecule-level of mixing, results in high degree of homogeneity, which leads to reduced temperature and prevention of phase segregation during heating.…”

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: Introductionmentioning

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

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“…• C), low thermal expansion, good chemical stability, and excellent insulation properties even at high temperatures [15]. As an important phase in the SiO 2 -Y 2 O 3 -Si 3 N 4 phase diagram, Y 2 SiO 5 is frequently identified as a precipitated phase at the grain boundaries of sintered Si 3 N 4 with Y 2 O 3 or Y 2 O 3 + SiO 2 as sintering aids.…”

Section: Resultsmentioning

confidence: 99%

The Carbothermal Reduction of Silica with Y₂O₃-MgO Powders

Canikoğlu

2017

Acta Phys. Pol. A

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The aim of this study is to examine the effect of MgO and Y2O3 to the carbothermal reduction and nitridation of silica. The synthetic silica, MgO and Y2O3 powders were premixed (4wt% MgO-6% Y2O3, 5% MgO-5% Y2O3 and 6% MgO-4% Y2O3) in the starting reactants depending on the final powder composition. Carbon black was added to the silica (SiO2) above the stoichiometric amount of oxygen (C/SiO2 ratio of 3). The carbothermal reduction and nitridation process was carried out in a tube furnace at 1400• C, 1450• C, and 1475• C for 3 h under nitrogen gas atmosphere. The synthesized Si3N4 powder properties were examined by using X-ray diffraction, scanning electron microscopy-energy dispersive X-ray spectrosopy. In this study, MgO and Y2O3 powders dispersed in the final Si3N4 powder more homogeneously and thus formable and sinterable the starting mixing material is produced.

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“…Therefore, the purity of the final powder was not affected when urea was used as chelating agent and template material. [16,17] The comparison of XRD patterns indicated that the crystallinity of LiB 3 O 5 was at maximum during 20 pct urea addition to the initial mixture at 1023 K (750°C) for 3 hours in an oven (Figure 1(b)). The intensities of lines belonging to LiB 3 O 5 were high and the lines of Li 2 B 4 O 7 were weak.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Different Synthesis Methods to Produce Lithium Triborate and Their Effects on Its Thermoluminescent Property

Depçi̇

Özbayoğlu

Yılmaz

2010

Metall Mater Trans A

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Lithium triborate (LiB 3 O 5 ) was produced by different synthesis methods, which included hightemperature solid-state reaction, microwave-assisted high-temperature solid-state reaction, and precipitation-assisted high-temperature solid-state reaction. After the synthesis, metal oxides (CuO and Al 2 O 3 ) were doped into LiB 3 O 5 to enhance its thermoluminescent (TL) properties, and the TL intensities were compared with each other. The identification and characteristics of undoped and doped LiB 3 O 5 were determined by X-ray diffraction (XRD), Fourier transform infrared (FTIR) analyses, differential thermal analyses (DTA), scanning electron microscopy (SEM), and particle size analyzer. The glow curves were obtained by using a TL reader. The results showed that synthesis routes affected the physical and structural properties of lithium triborate, which have an important effect on its TL intensity.

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A novel method to low temperature synthesis of nanocrystalline forsterite

Cited by 110 publications

References 10 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

The Carbothermal Reduction of Silica with Y₂O₃-MgO Powders

Comparison of Different Synthesis Methods to Produce Lithium Triborate and Their Effects on Its Thermoluminescent Property

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A novel method to low temperature synthesis of nanocrystalline forsterite

Cited by 110 publications

References 10 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

The Carbothermal Reduction of Silica with Y2O3-MgO Powders

Comparison of Different Synthesis Methods to Produce Lithium Triborate and Their Effects on Its Thermoluminescent Property

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The Carbothermal Reduction of Silica with Y₂O₃-MgO Powders