The effects of CeO2 addition on the physical and microstructural properties of ZTA-TiO2 ceramics composite by Azhar, Ahmad Zahirani Ahmad, Mohamad Shawal, Siti Hajar, Manshor, Hanisah, Mohd. Ali, Afifah, Rejab, Nik Akmar, Abdullah, Ezzat Chan, Ahmad, Zainal Arifin