The widespread application of additive manufacturing in ceramics is still hindered by recurrent cracking issues during debinding. To date, the various strategies that have been attempted to reduce this problem often fail upon particle size reduction. Indeed, a reduction affects diffusion rates (e.g. pore network) such even slow heating and long dwell times debinding may not prevent crack format...

Low-cost magnesium aluminate spinel ceramics were successfully synthesized from the minerals of magnesite(M) and bauxite(B) via one-step sintering method. The effect ratio bauxite to magnesite on phase evolution, microstructure, as well mechanical properties was thoroughly investigated. structural analysis indicated that Mg2+ or Al3+ ions dissolved in lattice formed Mg-rich/Al-rich MgAl2O4 (MA)...

Article history: Received 18 June 2014 Accepted 7 May 2015 Available online xxxx

Nanosized copper aluminate (CuAl(2)O(4)) spinel particles have been prepared by a precursor approach with the aid of ultrasound radiation. Mono-phasic copper aluminate with a crystallite diameter of 17nm along the (311) plane was formed when the products were synthesized using Cu(NO(3))(2) x 6H(2)O and Al(NO(3))(3) x 9H(2)O as starting materials, with urea as a precipitation agent at a concentr...

• Using LiOH, as a sintering aid, reduces the activation energy of MgAl 2 O 4 from 790 kJ.mol ?1 to 510 . Reactions between magnesium aluminate spinel and LiOH yield secondary phases that prevent grain growth. There is critical concentration ca. 0.3 wt%, above which growth promoted. The due preferential incorporation Li + Lithium hydroxide, in amounts ranging 0.1 1.2 wt% has been used aid impro...