Effects of the sintering process on the different properties of alumina/hydroxyapatite nanobiocomposites

Al2O3-Phosphate Bioceramic Fabrication via Spark Plasma Sintering-Reactive Synthesis: In Vivo and Microbiological Investigation

“…One way to address these issues is by enhancing the bioactive properties of ceramics through the incorporation of resorbable phases into their composition. Such resorbable composite ceramics become able to participate in the process of bone regeneration owing to the activation of osteosynthesis, as has been shown previously in a number of reports for ZrO 2 [9][10][11][12][13], Al 2 O 3 [14][15][16], CaSiO 3 [17][18][19][20][21][22], etc. Commonly used bioactive resorbable phases are calcium phosphates like tricalcium phosphate (TCP), calcium pyrophosphate, and also hydroxyapatite (HAp) [23][24][25][26].…”

The effect of different anions on the crystallization course of α‐Al2O3 powder in hydrothermal method

“…In order to obtain the best hydrothermal conditions on the final calcination products, powder XRD was employed to characterize the structural information of the calcination, and the results are shown in Figure 1 (the horizontal and vertical coordinates in the three figures were in agreement with the scale). Clearly, all the calcination products (under 1200°C) prepared from three aluminum sources hydrothermally at 120°C for 2 h were pure α‐Al 2 O 3 (PDF#88‐0826) 35 . However, when the hydrothermal temperature rises to 160°C or the hydrothermal duration prolongs to 6 h, θ‐Al 2 O 3 (PDF#35‐0121) was obtained 36 .…”

“…Clearly, all the calcination products (under 1200 • C) prepared from three aluminum sources hydrothermally at 120 • C for 2 h were pure α-Al 2 O 3 (PDF#88-0826). 35 However, when the hydrothermal temperature rises to 160 • C or the hydrothermal duration prolongs to 6 h, θ-Al 2 O 3 (PDF#35-0121) was obtained. 36 In summary, the optimal hydrothermal conditions were reaction 120 • C for 2 h.…”