Effect of annealing process on IR transmission and mechanical properties of spark plasma sintered Yttria

Fabrication of Y₂Ti₂O₇ Transparent Ceramic by Spark Plasma Sintering

“…The calculated lattice parameters for the specimens before and after annealing were 1.00935 and 1.00969 nm, respectively, which agreed with the value on the JCPDS card (1.0095 nm) and Y2Ti2O7 transparent ceramic fabricated by vacuum sintering using co-precipitated powders (1.009 nm) [17]. The slight increase in lattice parameter of Y2Ti2O7 transparent ceramic after annealing might be due to compensation of oxide vacancies formed during sintering, which was similar to SPSed yttria and magnesia-yttria nanocomposites [19,20].…”

Reaction behavior and wear properties of in-situ air plasma-sprayed Al2O3-TiB2 composite coatings

“…By decline of the grain size to the nanometer scale, elastic module decreases which enhances the hardness [30]. In the case of micro-scaled grain size, the effect of grain size on the hardness can be neglected [31]. Therefore, the hardness is associated with porosity of the coating.…”

Sandwich-like transparent ceramic demonstrates ultraviolet and visible broadband downconversion luminescence

“…The dark color of the ceramic is due to the high concentration of oxygen defects that come from high temperature sintering under a vacuum atmosphere, which is very common in transparent ceramic sintering. [23][24][25] In transparent ceramic fabrication, this is usually followed with long-term annealing at a relative high-temperature under an air atmosphere to eliminate the oxygen defects. 22,26 During the air annealing, the following defect reaction will occur:…”