Lee Chang Chuan
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Preferred name
Lee Chang Chuan
Official Name
Lee, Chang Chuan
Alternative Name
Lee, Cc
Chuan, Lee Chang
Lee, C. C.
Chuan, Lee C.
Lee, Chang Chuan
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Scopus Author ID
55312531900

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Microwave synthesis of silicon carbide nanowhiskers: Effect of molar ratio

2020-01-01 , Lee Chang Chuan , Kahar S.M. , Voon Chun Hong

Silicon carbide (SiC) is an attractive material for its excellent properties such as wide band gap, high chemical stability and thermal conductivity. The conventional methods for the preparation of SiC are time and energy consuming. In this paper, SiC nanowhiskers were synthesized by utilizing microwave heating. Mixture of graphite and silica of various ratio was heated to 1400 °C for 30 min at a heating rate of 20 °C/min. It was found that almost complete conversion of graphite and silica to silicon carbide nanowhiskers was observed for sample of mixture in the ratio of 1:3. Vapor-solid mechanism was suggested to explain the formation of SiC nanowhiskers.

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Effective synthesis of silicon carbide nanotubes by microwave heating of blended silicon dioxide and multi-walled carbon nanotube

2017 , Voo Chung Sung Tony , Voon Chun Hong , Lee Chang Chuan , Lim Bee Ying , Subash Chandra Bose Gopinath , Foo Kai Loong , Mohd Khairuddin Md Arshad , Ruslinda A. Rahim , Uda Hashim , Nashaain Mohd Nordin , Yarub Al-Douri

Silicon carbide nanotube (SiCNTs) has been proven as a suitable material for wide applications in high power, elevated temperature and harsh environment. For the first time, we reported in this article an effective synthesis of SiCNTs by microwave heating of SiO2 and MWCNTs in molar ratio of 1:1, 1:3, 1:5 and 1:7. Blend of SiO2 and MWCNTs in the molar ratio of 1:3 was proven to be the most suitable for the high yield synthesis of β-SiCNTs as confirmed by X-ray diffraction pattern. Only SiCNTs were observed from the blend of MWCNTs and SiO2 in the molar ratio of 1:3 from field emission scanning electron microscopy imaging. High magnification transmission electron microscopy showed that tubular structure of MWCNT was preserved with the inter-planar spacing of 0.25 nm. Absorption bands of Si-C bond were detected at 803 cm-1 in Fourier transform infrared spectrum. Thermal gravimetric analysis revealed that SiCNTs from ratio of 1:3 showed the lowest weight loss. Thus, our synthetic process indicates high yield conversion of SiO2 and MWCNTs to SiCNTs was achieved for blend of SiO2 and MWCNTs in molar ratio of 1:3.

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Business model transformation in the manufacturing company – how custom project governance framework enhances the chances of success

2020 , Chin Hoong Teoh , Zuraidah Mohd Zain , Lee Chang Chuan

The demand for complete solution providers is trending, and as a result, manufacturing companies, more than ever, are being challenged to transform their approach from hardware-centric to solutions-centric. Failure to do so could be catastrophic. Many companies have started the transformation in order to stay in business and also for enhancement of growth prospects. They work on increasing their chances of success through project governance that applies across a range of solutions. This paper shows that transformation success is enhanced through the use of a custom project governance framework that allows for the selection of the appropriate custom project governance for any solution category. The nature and relationship between the development work and customization of personalization has led the authors to opt for personalization theory as the theoretical lens. This study started with the formulation of the research process, followed by literature review, development work, and finally a qualitative longitudinal study in an advanced analytical equipment company. The positive outcomes from the development work that has been customized for custom solution businesses will allow researchers and practitioners to develop intangible customization of personalization for a project governance framework of their own to aid business model transformation in the manufacturing company.

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