Faizul Che Pa
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/39893
2024-03-29T04:37:54ZSelf-Fluxing Mechanism in Geopolymerization for Low-Sintering Temperature of Ceramic
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/72980
Self-Fluxing Mechanism in Geopolymerization for Low-Sintering Temperature of Ceramic
Faizul, Che Pa; Hasmaliza, Mohamad; Wan Mohd Arif, W. Ibrahim; Amonpattaratkit, Penphitcha; Gondro, Joanna; Sochacki, Wojciech; Norfadhilah, Ibrahim
Kaolin, theoretically known as having low reactivity during geopolymerization, was used as a source of aluminosilicate materials in this study. Due to this concern, it is challenging to directly produce kaolin geopolymers without pre-treatment. The addition of ground granulated blast furnace slag (GGBS) accelerated the geopolymerization process. Kaolin–GGBS geopolymer ceramic was prepared at a low sintering temperature due to the reaction of the chemical composition during the initial stage of geopolymerization. The objective of this work was to study the influence of the chemical composition towards sintering temperature of sintered kaolin–GGBS geopolymer. Kaolin–GGBS geopolymer was prepared with a ratio of solid to liquid 2:1 and cured at 60 °C for 14 days. The cured geopolymer was sintered at different temperatures: 800, 900, 1000, and 1100 °C. Sintering at 900 °C resulted in the highest compressive strength due to the formation of densified microstructure, while higher sintering temperature led to the formation of interconnected pores. The difference in the X-ray absorption near edge structure (XANES) spectra was related to the phases obtained from the X-ray diffraction analysis, such as akermanite and anothite. Thermal analysis indicated the stability of sintered kaolin–GGBS geopolymer when exposed to 1100 °C, proving that kaolin can be directly used without heat treatment in geopolymers. The geopolymerization process facilitates the stability of cured samples when directly sintered, as well as plays a significant role as a self-fluxing agent to reduce the sintering temperature when producing sintered kaolin–GGBS geopolymers.
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2021-03-10T00:00:00ZPalm Ash as an Alternative Source for Silica Production
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/68615
Palm Ash as an Alternative Source for Silica Production
Faizul, Che Pa; Abdullah, Chik; Md. Fazlul, Bari
Agricultural wastes such as palm ash and rice husk have a possibility to be used as a useful renewable source for the production of silica (SiO2). Extensive researches have been carried out to extract silica from agricultural wastes such as rice husk, due to silica as a useful raw material for industrial application. In this study, the environmentally benign and economically effective process to produce SiO2 materials from palm ash has been established by using citric acid leaching, not the conventional strong acids. Results showed that silica can be extracted from palm ash using the citric acid leaching method under the optimum extracting conditions with 700 °C of solution temperature, 60 minutes of reaction time and concentration of citric acid of more than 2 %. The purity of silica extracted is more than 90 %.
Link to publisher's homepage at https://www.matec-conferences.org/
2016-01-01T00:00:00ZAluminium - Polymer abs product
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/50494
Aluminium - Polymer abs product
Mohd Ichwan, Nasution; Kamaruddin, Hussin; Shamsul Baharin, Jamaludin; Che Mohd Ruzaidi, Ghazali; Khairel Rafezi, Ahmad; Faizul, Che Pa; Chek Idrus, Omar
Material used for aluminium product usually made of aluminium scrap. Currently, the price of aluminium scrap is increase. It is necessary to minimize the cost of production by reducing the weight of the aluminium product at the same time remain the form or the shape of the product. Fabrication of aluminium matrix composite is one of the method to reduce the weight of aluminium but the modulus improved due the addition of ceramic materials as reinforcement. Acrylonitrine Butadiene Styrene (ABS) was selected because of its low density and low melting temperature. The results indicated that homogenous microstructure and better strengh can be obtained.
Link to publisher's homepage at http://jere.unimap.edu.my
2012-01-01T00:00:00ZAlteration of solution treatment condition to the precipitation behaviour A319 alloy
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/34849
Alteration of solution treatment condition to the precipitation behaviour A319 alloy
Murizam, Darus; Shamsul, Baharin Jamaludin, Prof. Dr.; Mohd Arif Anuar, Mohd Salleh; Faizul, Che Pa; Ruhiyuddin, Mohd Zaki
The development of precipitate during ageing treatment of A319 alloy contributed significantly to the alloy strengthening mechanism. Two solution treatment temperatures which were set at 510°C and 525°C were subjected onto the different groups of A319 alloy samples and followed by artificial ageing process at 180°C. Scanning electron microscopy was employed to observe the over-aged samples from both solution treatment temperatures. The observation shows that Mg2Si precipitates was only appeared at the higher solution treatment condition, while the Al2Cu precipitate developed in both solution treatment temperatures.
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2013-01-01T00:00:00Z