Processing of ZrO2 scaffolds coated by glass–ceramic derived from 45S5 bioglass

Processing of Concentrated Aqueous Zirconia-Bioglass Slips by Slip Casting

“…1); however, this pH increase was markedly lower than that observed during the aqueous colloidal processing of 45S5 glass (pH 12) [18]. Thus, the exchange reaction rate at the glass solution interface was significantly reduced by using the composition 64S glass in the present study.…”

“…As reported in our previous study [18], the nucleation of amorphous calcium phosphate on the 45S5 surface occurred upon its immersion in water. The amorphous calcium phosphate formation could be interpreted by the bio-mineralization mechanism proposed by Hench [22].…”

“…Figure 4 shows the pH as a function of the immersion time for 20 wt% 64S slips. The respective curve for 20 wt% 45S5 slips determined in our previous study [18] is also shown for comparison. For the 64S glass studied, a slight increase in pH during 2 h 30 min of immersion in aqueous solution from 7.35 (the initial pH of water) to 8.37 was found, while an important increase in pH to 11.50 was found for the 45S5 immediately after immersion.…”

“…The surface charge of the 64S powder was negative in the whole pH range studied; a slightly increase in the negative surface charge of the glass with increasing pH was observed. The glass surface mainly consists of silanol (Si-OH) and ≡CaOH 2 + sites and a lower amount of ≡PO -surface groups [18]. At alkaline pH, the Si-OH and ≡CaOH 2 + sites loss a proton producing Si-O -and ≡CaOH 0 sites which imparts a low negative surface charge.…”

A study on the effect of presence of CeO2 and benzotriazole on activation of self‐healing mechanism in ZrO2 ceramic‐based coating

“…XRD analysis patterns are shown in Figure . It can be observed that both zirconia single‐component coating and zirconia‐ceria‐benzotriazole ceramic‐based coating have amorphous structure and no phases are formed in them . It can also be observed from this figure that XRD patterns of both zirconia single‐component coating and zirconia‐ceria‐benzotriazole ceramic‐based coating include a very broad peak at 2θ = 20‐30°.…”