Nano α-Al2O3-t-ZrO2 composite powders by calcining an emulsion precursor at 1100°C

Processing of Alumina and Corresponding Composites

“…In particular, special routes different from the simple powder mixing are needed, which include specific steps for powder synthesis before fabrication of the ceramic body. Several methods have been proposed to prepare intimate mixtures of alumina-zirconia nanopowders, including chemical vapor synthesis (Srdic, Winterer, Miehe, & Hahn, 1999), thermal decomposition of mixed salts (Chandradass, Yoon, Bae, 2008a, 2008bKikkawa, Kijima, Hirota, & Yamaguchi, 2002), calcination of an emulsion precursor (Chandradass & Bae, 2009), sol-gel (Jayaseelan, Nishikawa, Awaji, & Gnanam, 1998;Sarkar, Mohapatra, Ray, Bhattacharyya, Adak, & Mitra, 2007;Srdic & Radonjic, 1997), solution combustion synthesis (Biamino, Fino, Pavese, & Badini, 2006), and hydrothermal synthesis (Chandradass et al, 2008a(Chandradass et al, , 2008b. Hydrothermal synthesis seems to be one of the most adequate methods for nanopowder production but it lacks efficiency.…”

The Influence of Oleic Acid to Metal Nitrate Ratio on the Particle Size and Magnetic Properties of Lanthanum Ferrite Nanoparticles by Emulsion Method

“…The small reaction field and short reaction period lead to the formation of nanosize ceramic particles [16]. This technology, also known as calcination control of chemical additives (CCCA), has been used in previous studies for the preparation of LaAlO 3 [17,18], BaTiO 3 [19], Al 2 O 3 [20][21][22], ZrO 2 [23], -Al 2 O 3 -t-ZrO 2 [24], LiCoO 2 [25], Yttria stabilized zirconia [26], ZrO 2 -CeO 2 [27], ZnO [28], Fe 2 O 3 [28], CeO 2 [28], MgO [28], and ZnO-SiO 2 [29] fine powders. Hollow spheres of Al 2 O 3 TiO 2 ZrO 2 Y 2 O 3 , and solid particles of ZrO 2 -CeO 2 , ZnO, Fe 2 O 3 CeO 2 , MgO, and BaTiO 3 can be prepared by this process.…”

Photo-quenched of the luminiscence signal in Co(II)-doped alumina prepared by the sol–gel method

“…Alumina (Al 2 O 3 ) is a very interesting material with a wide range of important technological applications: aluminum production, thermal insulation, electronic, dryer, corrosion protection, water absorption, dental prosthesis, abrasives, wearing resistant coatings, catalyst, catalytic support, etc [1][2][3]. The α-alumina (corundum) is the most common form of the crystalline alumina [4,5]; its unit cell has a hexagonal close-packed cell structure, with a rhombohedral primitive cell consisting of 10 atoms: four of aluminum and six of oxygen.…”