Preparation of oxynitride glasses from woody biofuel ashes

Ali, Sharafat; Jonson, Bo

doi:10.1016/j.jnoncrysol.2010.09.071

Cited by 3 publications

(1 citation statement)

References 38 publications

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“…Margandan [14] extracted 93.2% SiO 2 by treating rice husk at 700 °C for 12 h, and it was further used to synthesize Fe-ZSM-5 zeolite. Many authors have previously used heat and chemical treatment in different sequence to produce silica material from bagasse, rice, wheat and other agricultural residues, and achieved up to 98% SiO 2 purity and further used it for glass ceramics and other applications [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Nano-Silica from Teff Straw

Wassie

Srivastava

2017

JNanoR

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Efficient utilization of agricultural residue is the need of today’s environment. Teff straw is one such agricultural residue which is available in high amount in east African continent particularly Ethiopia. In the present study, combination of heat and acid treatment has been used to extract nano-silica from teff straw. X-ray fluorescence (XRF) analysis showed presence of high amount of silicon dioxide (≈52%) in raw teff straw. Thermal treatment at 600°C for 4 hour increased the SiO2 concentration to ≈ 92% in its ash. Further acid treatment increased the concentration to ≈97%. Fourier transform infrared (FTIR) spectroscopy also confirmed increase in SiO2 after thermal and acid treatment. X-ray diffraction (XRD) analysis showed the silica of amorphous nature in teff straw ash before acid treatment (S-BAT) whereas crystallinity increased after acid treatment (S-AAT). Transmission electron microscopy (TEM) showed presence of uniform nano-disks shaped particles of 50 nm average particle size in acid treated teff straw ash. Compared to other agricultural residues high amount of silica availability as raw and its small diameter anatomy structure will make teff straw better source of silica material at lower heat and chemical treatment.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Nano-Silica from Teff Straw

Wassie

Srivastava

2017

JNanoR

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The effect of nitrogen on the structure and thermal properties of beryllium-containing Na-(Li)-Si-O-N glasses

Wójcik

Jonson

Möncke

et al. 2019

Journal of Non-Crystalline Solids

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Elastic Properties and Hardness of Mixed Alkaline Earth Silicate Oxynitride Glasses

Ali

2022

Materials

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The incorporation of nitrogen as a second anion species into oxide glasses offers unique opportunities for modifying glass properties via changes in glass polymerization and structure. In this work, the compositional dependence of elastic properties and the nanoindentation hardness of mixed alkaline-earth silicate oxynitride glasses containing a high amount of nitrogen (>15 at.%, c.a. 35 e/o) were investigated. Three series of silicon oxynitride glass compositions AE–Ca–Si–O–N glasses (where AE = Mg, Sr, and Ba) having varying amounts of modifiers were prepared using a new glass synthesis route, in which a precursor powder of metal hydrides was used. The obtained glasses contained high amounts of N (19 at.%, c.a. 43 e/o) and modifier cations (26 at.%, c.a. 39 e/o). Mg–Ca–Si–O–N glasses had high values of nanohardness (12–16 GPa), along with a reduced elastic modulus (130–153 GPa) and Young’s modulus (127–146 GPa), in comparison with the Sr–Ca- and Ba–Ca-bearing oxynitride glasses. Both the elastic modulus and the nanohardness of AE–Ca–Si–O–N glasses decreased with an increase in the atomic number of the AE element. These property changes followed a linear dependence on the effective cation field strength (ECFS) of the alkaline earth (AE) modifier, according to their valences and ionic radii. No mixed alkaline-earth effect was observed in the current investigation, indicating that the properties were more dictated by the nitrogen content.

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Preparation of oxynitride glasses from woody biofuel ashes

Cited by 3 publications

References 38 publications

Synthesis and Characterization of Nano-Silica from Teff Straw

Synthesis and Characterization of Nano-Silica from Teff Straw

The effect of nitrogen on the structure and thermal properties of beryllium-containing Na-(Li)-Si-O-N glasses

Elastic Properties and Hardness of Mixed Alkaline Earth Silicate Oxynitride Glasses

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