scholarly journals Crystal Structure and Thermal Behaviour of Calcium Monosilicate Derived from Calcined Chicken Eggshell and Rice Husk Ash

2021 ◽  
Vol 2129 (1) ◽  
pp. 012040
Author(s):  
Nur Hazlinda Jakfar ◽  
Khor Shing Fhan ◽  
Banjuraizah Johar ◽  
Nur Maizatul Shima Adzali ◽  
Siti Nur Hazwani Mohd. Yunus ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Silicon Dioxide ◽  
Heating Rate ◽  
Calcium Oxide ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Sintering Temperature ◽  
Rice Husks ◽  
Mixed Powder ◽  
Chicken Eggshell

Abstract This study focuses on the synthesis of synthetic calcium monosilicate ceramic from chicken eggshells and rice husks waste through the mechanochemical route that relatively straightforward without adding any binders. Synthetic calcium monosilicate was mixed using a 1:1 ratio of calcined eggshell and rice husk ash, which both materials known as rich in calcium oxide and silica sources, respectively. The mixed powder was pressed using uniaxial pressing before fired at 1100°C, 1150°C, 1200°C, 1250°C, and 1300°C for 120 minutes with a heating rate of 5°C/min. The XRD spectrum from 1100°C to 1200°C mainly consists of pseudowollastonite (ICSD: 98-005-2576), wollastonite and silicon dioxide phases. However, as the sintering temperature increases, the wollastonite phases was completely transformed into pseudowollastonite, leaving some unreacted silica.

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 Preparation of low-cost nano and microcomposites from chicken eggshell, nano-silica and rice husk ash and their utilisations as additives for producing geopolymer cements

2020 ◽  
Vol 8 (1) ◽  
pp. 149-161 ◽  
Author(s):  
H. K. Tchakouté ◽  
D. E. Tchinda Mabah ◽  
C. Henning Rüscher ◽  
E. Kamseu ◽  
F. Andreola ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Low Cost ◽  
Nano Silica ◽  
Chicken Eggshell ◽  
Geopolymer Cements

scholarly journals Hydrochloric Acid Pretreatment of Different Types of Rice Husk Ash Influence on the Properties of Cement Paste

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1524 ◽  
Author(s):  
Jing Liu ◽  
Chunyan Xie ◽  
Chao Fu ◽  
Xiuli Wei ◽  
Dake Wu
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Cement Paste ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Control Sample ◽  
Control Group ◽  
Rice Husks ◽  
Acid Pretreatment ◽  
Blank Control Group

When properly processed, rice husk ash (RHA) comprises a large amount of SiO2, which exhibits a high pozzolanic activity and acts as a good building filler. In this paper, the effects of rice husk ash content, acid pretreatment, and production regions on the compressive and flexural properties and water absorption of a cement paste were studied. The experimental results showed that the compressive strength of the rice husk ash was the highest with a 10% content level, which was about 16.22% higher than that of the control sample. The rice husk after acid pretreatment displayed a higher strength than that of the sample without the acid treatment, and the rice husk from the Inner Mongolia region indicated a higher strength than that from the Guangdong province. However, the flexural strength of each group was not significantly different from that of the blank control group. The trend observed for the water absorption was similar to that of the compressive strength. The variation in the RHA proportions had the greatest influence on the properties of the paste specimens, followed by the acid pretreatments of the rice husks. The production regions of the rice husks indicated the least influence.

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

Effect of Rice Husk Ash Based Silicon Dioxide on the Properties of SUZ-4 Zeolite

2017 ◽  
Vol 729 ◽  
pp. 24-29
Author(s):  
Thitipob Sirisoontornpanit ◽  
Atichat Wongkoblab ◽  
Supunnee Junpirom
Keyword(s):  
Silicon Dioxide ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Sol Gel ◽  
Hydrothermal Process ◽  
Temperature Programmed Desorption ◽  
Acid Sites ◽  
Weak Acid ◽  
Molar Ratio ◽  
Temperature Programmed

SUZ-4 zeolite was synthesized by the sol-gel technique, followed by hydrothermal process. The effect of the molar ratio of rice husk ash based silicon dioxide to silica solution was investigated. The synthesized zeolite was characterized by XRD, SEM, N2 adsorption and temperature programmed desorption. The results show that the SUZ-4 zeolite was formed for all investigated conditions. However, the formation of MER zeolite occurred as an impurity for the content of rice husk ash higher than 75%. A needle shape crystal with mainly microporous structure is the feature of synthesized SUZ-4 zeolite. The result of temperature programmed desorption indicated that the chemical surface property of obtained SUZ-4 zeolite was weak acid sites.

Study of the mechanical and the thermal insulation properties of polyurethane coating containing chicken eggshell and rice husk ash as fillers

2016 ◽  
Vol 45 (5) ◽  
pp. 313-319 ◽  
Author(s):  
Bee Chin Ang ◽  
Norasikin Ahmad ◽  
Zhi Chao Ong ◽  
Shun Chi Cheok ◽  
Hui Fen Chan
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Dip Coating ◽  
Gravimetric Analysis ◽  
High Porosity ◽  
Coating System ◽  
Content Type ◽  
Chicken Eggshell

Purpose The main aim of this study was to examine the effects of chicken eggshell (CES) and rice husk ash (RHA) as fillers on the mechanical and the thermal insulation properties of polyurethane coatings. Design/methodology/approach CES and RHA were ground via ball milling set at different parameters, and the smallest particles size obtained were selected and used as fillers. Fillers of different weight proportions were mixed with other components such as binder, solvent and pigment to form various coating formulations and test samples were made via dip coating. A series of characterisations were conducted to analyse the thermal and mechanical properties of the coating. Findings The smallest particle size of CES and RHA was obtained after both of them had undergone grinding process at 400 rpm within 180 min. Morphological studies revealed that CES and RHA have irregular shape and high porosity. In crystallographic analysis, CES mainly composed of pure calcite crystal structure and RHA contained amorphous silica. Both of fillers were found thermally stable up to 520 and 710°C for RHA and CES, respectively. In RHA individual system, as the RHA proportion increases, the thermal conductivity of the coating declined. In contrast, in the CES coating system, the thermal conductivity demonstrated an opposite trend. Thermal gravimetric analysis results displayed that by adding hybrid fillers, the residue weight and the thermal stability of the coatings were increased. In addition, the adhesion strength of the coating was increased as the filler weight content increased. Research limitations/implications Fillers with nano-range size were expected to be produced in this research for better performance of the coating. However, the obtained fillers were limited to micron size through dry grinding method. Another drawback in this research was the coating technique which is dip coating. The coated substrates do not have uniform coating thickness and this subsequently influenced the performance. Originality/value A novel attempt has been made to study the formulation coating system by mixing CES and RHA as fillers which is also known as a hybrid system.

Effects of Sintering Temperature on the Mullite-Based Ceramics Fabricated from Rice Husk Ash

2017 ◽  
Vol 873 ◽  
pp. 65-70
Author(s):  
Rabiatul Adawiyah Abdul Wahab ◽  
Mohd Ashmir Yahya ◽  
Khamirul Amin Matori ◽  
Wan Azlina Wan Abdul Karim Ghani
Keyword(s):  
Bulk Density ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Sintering Temperature ◽  
Stoichiometric Composition ◽  
Linear Shrinkage ◽  
Al2o3 Content ◽  
Mullite Ceramic ◽  
X Ray ◽  
High Dependency

Mullite-based ceramics were prepared by utilizing agriculture by-product called as rice husk ash (RHA) from untreated rice husk (RH) and commercial alumina powdermixtures. Various samples were prepared accordingly with the mullite stoichiometric composition and subjected to the uniaxial hydraulic press. The green bodies, then were sintered to various temperatures at 1200 °C, 1300 °C, 1350 °C, 1400 °C, 1450 °C and 1500 °C in an electric furnace. Physical and microstructural characterization were done such as bulk density (BD), linear shrinkage (LS), X-ray fluorescence (XRF), X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). The sample M1, which composed the slightest RHA (40 %) was considered the optimum composition which produced the highest densification, 3.101 g/cm3 and the lowest linear shrinkage, 8.62 % which compareswith the theoretical mullite density. Besides, it is supported by the evidence of the presenceof mullite in the samples sintered 1300 °C (shown as elongated shape) as primary mullite and continued to grow at higher temperatures at 1400 °C (shown as equiaxed shape) as secondary mullite. The sintered samples showno evidence of mullite inearly at 1200 °C due to insufficient energy to diffuse for mullitization. As the sintering temperature increased, mullitization increased while decreasing the distribution of glassy phase and voids. The results revealed the high dependency of bulk density and linear shrinkage on the Al2O3 content and the values were gradually increased with the increase of sintering temperature. These findingsmay lead to the extended study ofthermal insulationmaterials as mullite ceramic is an excellent candidate for this application due to its properties.

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