FABRICATION OF TRANSPARENT MgAl2O4 SPINEL CERAMICS BY PECS PROCESSING OF COMBUSTION - SYTHESIZED NANOPOWDERS - Yen Ngoc Nguyen; Anh Quang Dao; Minh-Tung Le; Khanh Quoc Dang; Makoto Nanko (Acta Metallurgica Slovaca, 2019)