retracted: h. belhouchet, h. makri, m. hamidouche, n. bouaouadja, v. garnier, g. fantozzi: multiphase composites obtained by sintering reaction of boehmite and zircon part i: development and microstructural characterization, science of sintering, 2014, vol. 46 br. 3 doi: 10.2298/sos1403291b