[1] Rajamangala Univ Technol Isan, Fac Sci & Liberal Arts, Dept Appl Phys, Nakhon Ratchasima 30000, Thailand
[2] Suranaree Univ Technol, Inst Engn, Sch Ceram Engn, Nakhon Ratchasima 30000, Thailand
[3] Suranaree Univ Technol, Inst Engn, Sch Elect Engn, Nakhon Ratchasima 30000, Thailand
[4] Rajamangala Univ Technol Isan, Dept Mat Engn, Fac Engn & Architecture, Nakhon Ratchasima 30000, Thailand
[5] Suranaree Univ Technol, Inst Sci, Sch Phys, Nakhon Ratchasima 30000, Thailand