Thermal diffusivity of glass-ceramics (soda lime silica glass – wastewater sludge) using laser flash method - Zaibon, Syaharudin; Abdul Wahab, Zaidan; Matori, Khamirul Amin; Edros, Norfarezah Hanim; Thai, Ming Yeow; Mayzan, Mohd Zul Hilmi; Joha, Nurfahana Ayuni (Faculty of Science, Universiti Putra Malaysia, 2009)