Structural and Electrical Properties of Silica Materials from Rice Husks

2021 ◽  
Vol 38 (2) ◽  
Author(s):  
Casnan ◽  
Purnawan ◽  
Erliza Noor ◽  
Hartrisari Hardjomidjojo ◽  
Irzaman ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Rice Husk Ash ◽  
Silanol Group ◽  
Xrd Analysis ◽  
Silica Content ◽  
Dielectric Constants ◽  
Rice Husks ◽  
Capacitor Plate ◽  
Structural And Electrical Properties

This study aimed to analyze the structural and electrical properties of silica from rice husks recovered by the process of ashing on a medium-scale furnace with a capacity of 15 kg. Rice husks were burned at a heating rate of 1.5°C /min to a temperature of 900°C, where the temperature was retained for 1 hour each at 400°C and 900°C. The methodology of this research was conducted through the process of ashing, extraction of silica, and characterization of its structural electrical properties. The silica extracted from rice husk ash had a relatively low water content by the low absorption intensity of the group –OH at 3610 cm-1. The silica was dominated more by the siloxane group (Si-O-Si) compared with the silanol group (Si-OH). Based on XRD analysis, the silica structure was confirmed as tetragonal. The silica also had a decreased resistance, impedance, and inductance as the frequency increased. These results indicate that the obstacles contained in silica content decrease with an increase in frequency. The decreasing of dielectric constants was caused by the frequency affecting the capacitance; i.e., increased frequency caused more waves to be transmitted each second. The electric current was turned before the capacitor plate was fully charged, which caused quick charge drainage in the capacitor plate and therefore reduced the ability of a material to store the electric charge.

scholarly journals PRODUCTION OF SODIUM SILICATE FROM RICE HUSK ASH WITH REGULATORY SETS MAGNESIUM

Tibuana ◽  
2020 ◽  
Vol 3 (01) ◽  
pp. 47-52
Author(s):  
Yanatra budi Pramana ◽  
M. Amin Pahlevi ◽  
Zhulianto Ashari ◽  
M. Fariz Effendi ◽  
Fibra Gilang Ramadhan
Keyword(s):  
Sodium Silicate ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Silica Content ◽  
Cosmetic Products ◽  
Rice Husks ◽  
Mg Addition ◽  
Increase Silica Content

Utilization of rice husks in Indonesia in general is still very limited. Utilization of silica contained in rice husk ash, which has been used, among others, in the manufacture of sodium silicate. Silica compounds themselves can be used in and manufacturing basic materials for electronic and ceramic equipment, glass, rubber, cosmetic products, and pharmaceuticals. The addition of Mg can increase the silica content (SiO2) in rice husk ash. The best results show an effective Mg ratio of Mg addition to increase silica content is 1: 1. produces the highest amount of silica which is 58.12% of the rice husk ash with a size of 140 mesh

scholarly journals Karakterisasi Bionanofiller Dari Limbah Padi Sebagai Alternatif Penguatan Pada Polimer Komposit

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Eryani . ◽  
Sri Aprilia ◽  
Farid Mulana
Keyword(s):  
Rice Straw ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Particle Density ◽  
Agricultural Waste ◽  
Xrd Analysis ◽  
Silica Content ◽  
Sem Analysis ◽  
Agricultural Produce ◽  
Mechanical Properties Characterization

<p>Agricultural waste such as rice straw, rice husk and rice husk ash have not been utilized properly. This waste of agricultural produce can actually be used as an alternative to bionanofiller because it contains an excellent source of silica. The silica content contained in the rice waste when combined with the polymer matrix can produce composites having high thermal and mechanical properties. Characterization of bionanofiller from this rice waste is done by SEM, XRF, FTIR, XRD and particle density. The result of SEM analysis from this rice waste is feasible to be used as filler because it has size 1 μm. Likewise with the results of XRF analysis that rice waste contains a high enough silica component that is 80.6255% - 89.83%. FTIR test results also show that bionanoparticles from rice waste have the same content of silica. In the XRD analysis the best selective gain of rice waste is found in rice husk ash which is characteristic of amorp silica at a range of 2ϴ = 22<br />. The largest density analysis of paddy waste was found in rice husk 0.0419 gr / cm , followed by rice straw by of 0.0417 gr / cm 3 and rice hulk ash 0.0407 g / cm 3</p>

scholarly journals Effects of Sintering Temperature Variation on Synthesis of Glass-Ceramic Phosphor Using Rice Husk Ash as Silica Source

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5413
Author(s):  
Rabiatul Adawiyah Abdul Wahab ◽  
Mohd Hafiz Mohd Zaid ◽  
Sidek Hj. Ab Aziz ◽  
Khamirul Amin Matori ◽  
Yap Wing Fen ◽  
...  
Keyword(s):  
Rice Husk ◽  
Glass Ceramic ◽  
Rice Husk Ash ◽  
Glass Ceramics ◽  
Xrd Analysis ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
Silica Source ◽  
Quenching Method

In this study, the authors attempted to propose the very first study on fabrication and characterization of zinc-boro-silicate (ZBS) glass-ceramics derived from the ternary zinc-boro-silicate (ZnO)0.65(B2O3)0.15(RHA)0.2 glass system through a conventional melt-quenching method by incorporating rice husk ash (RHA) as the silica (SiO2) source, followed by a sintering process. Optimization of sintering condition has densified the sintered samples while embedded beta willemite (β-Zn2SiO4) and alpha willemite (α-Zn2SiO4) were proven in X-ray diffraction (XRD) analysis. Field emission scanning electron microscopy (FESEM) has shown the distribution of willemite crystals in rhombohedral shape crystals and successfully form closely-packed grains due to intense crystallization. The photoluminescence (PL) spectra of all sintered ZBS glasses presented various emission peaks at 425, 463, 487, 531, and 643 nm corresponded to violet, blue, green, and red emission, respectively. The correlation between the densification, phase transformation, microstructure, and photoluminescence of Zn2SiO4 glass-ceramic phosphor is discussed in detail.

Synthesis and Characterization of Antibacterial Silver Nanoparticle-Impregnated Rice Husks and Rice Husk Ash

2013 ◽  
Vol 47 (10) ◽  
pp. 5276-5284 ◽  
Author(s):  
Di He ◽  
Atsushi Ikeda-Ohno ◽  
Daniel D. Boland ◽  
T. David Waite
Keyword(s):  
Rice Husk ◽  
Silver Nanoparticle ◽  
Rice Husk Ash ◽  
Synthesis And Characterization ◽  
Rice Husks

Characterization of structural and electrical properties of ZnO tetrapods

2011 ◽  
Vol 18 (6) ◽  
pp. 686-690 ◽  
Author(s):  
Yu-dong Gu ◽  
Wen-jie Mai ◽  
Peng Jiang
Keyword(s):  
Electrical Properties ◽  
Structural And Electrical Properties

scholarly journals Synthesis and characterization of graphene derived from rice husks

2019 ◽  
Vol 15 (4) ◽  
pp. 516-521 ◽  
Author(s):  
Mohammad Shafri Ismail ◽  
Norhaniza Yusof ◽  
Mohd Zamri Mohd Yusop ◽  
Ahmad Fauzi Ismail ◽  
Juhana Jaafar ◽  
...  
Keyword(s):  
Potassium Hydroxide ◽  
Rice Husk Ash ◽  
Synthesis Temperature ◽  
Synthesis Process ◽  
Rice Husks ◽  
Spectroscopy Analysis ◽  
Graphitic Structure ◽  
Impregnation Ratio ◽  
Synthesis Methodology

Graphene was successfully synthesized by activating rice husk ash (RHA) using potassium hydroxide (KOH) at 800 oC with 1:2 impregnation ratio. Raman spectroscopy analysis confirmed the presence of graphitic structure. The demonstrated methodology utilizes RHA as carbon source and used as sacrifice to prevent oxidation during synthesis process on the mixture of KOH and RHA against air at high temperature. The novelty of this synthesis methodology use environmentally-friendly biomass resource as a starting material, does not utilize catalysts, and prove that graphene can be synthesized at a relatively low synthesis temperature.

scholarly journals Structural and Electrical Properties Characterization of Sb1.52Bi0.48Te3.0 Melt-Spun Ribbons

Crystals ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 172 ◽  
Author(s):  
Viktoriia Ohorodniichuk ◽  
Anne Dauscher ◽  
Elsa Branco Lopes ◽  
Sylvie Migot ◽  
Christophe Candolfi ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Structural And Electrical Properties ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Properties Characterization

scholarly journals Characterization of Chitosan-Bentonite and Water Hyacinth Plant as a Potential Adsorbent

2018 ◽  
Vol 1 (1) ◽  
pp. 50
Author(s):  
Moondra Zubir ◽  
Hafni Indriati Nasution ◽  
Mutya Fika Safitri ◽  
Agustina Mandasari
Keyword(s):  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Xrd Analysis ◽  
Silica Content ◽  
Triclinic Crystal System ◽  
X Ray ◽  
Crystal System ◽  
Infra Red ◽  
Ftir Spectrophotometry

Water hyacinth (Eichhornia crassipes) has a very rapid growth in the waters so it can cause eutrophication. The silica content of 5.56% allows water hyacinth can be utilized as a natural adsorbent. Bentonit has an advantage as an adsorbent because it has an inter-layered structure that can be easily modified with chitosan, resulting in better performance as an eco-friendly adsorbent. This research aims to determine the characterization of chitosan-bentonite and water hyacinth as a adsorbent of Pb(II)removal. Characterization tests were performed using X-ray difraction (XRD) and Fourier Transform Infra Red (FTIR) spectrophotometry. From the results of quantitative XRD analysis can be seen that the adsorbent of chitosan-bentonit and water hyacinth have different adsorbent characteristic, but has the same crystal system that is triclinic crystal system.

Bioglasses in the SiO2-CaO-P2O5 System

2008 ◽  
Vol 47-50 ◽  
pp. 1063-1066 ◽  
Author(s):  
Costel Birsan ◽  
Cristina Ghitulica ◽  
Ecaterina Andronescu ◽  
Cristina Ionita ◽  
Mihaela Birsan
Keyword(s):  
Body Fluid ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Silica Content ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Physiological Serum ◽  
P2o5 System

The aim of the study was the synthesis and characterization of bioactive osteoinductive glasses, in the SiO2 – CaO – P2O5 system. In order to maintain the bioactive character of bioglasses, for SiO2 contents higher than 60%, the sol – gel method was used for preparation. On the obtained powders, thermal, grain size and X - ray diffraction analysis were performed. The X - ray diffraction emphasized the formation of phosphate phases, whose proportion decreases as the silica content is increased. Later, the powders were thermally treated at temperatures between 1000 and 14000C, the phase composition evolution being monitored through XRD analysis. On the powder suspensions in physiological serum, the evolution of pH was investigated, in order to establish the chemical stability. The behavior of the obtained powders in physiological medium was studied, by immersing samples in simulated body fluid and excerpted after different periods of time.

Structural and Electrical Properties of ZnTe Thin Films Deposited at Various Substrate Temperatures

2013 ◽  
Vol 665 ◽  
pp. 80-84
Author(s):  
J.R. Gandhi ◽  
K.D. Patel ◽  
G.K. Solanki
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Structural Parameters ◽  
Hall Effect Measurement ◽  
Xrd Analysis ◽  
Electrical Parameters ◽  
Glass Substrates ◽  
Structural And Electrical Properties ◽  
Substrate Temperatures ◽  
Znte Thin Films

The structural and electrical properties of ZnTe thin films were investigated as a function of substrate temperature. Vacuum evaporated thin films of Zinc Telluride (ZnTe) of 10kÅ thickness have been deposited on ultrasonically cleaned glass substrates at various substrate temperatures (303K, 373K 448K). Structural parameters were obtained using XRD analysis. It was observed that the films deposited were cubic in nature with a strong (111) texture. Electrical parameters (Hall Effect measurement) have been obtained and studied at various temperatures in the range 303-393K. It is observed that Hall coefficient remains positive throughout the whole temperature range indicating that holes are the majority carriers. The results obtained from structural and electrical parameters study have been correlated and it is found that the thin films deposited at higher substrate temperatures possess increasingly good crystalline structure with improved electrical conductivity along with an increase in carrier concentration and mobility of carriers.

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