Deoxidisation and phase analysis of plasma sprayed TiO2 by X-ray Rietveld method

Photocatalytic Degradation of Diazinon Using Titanium Oxide Synthesized by Alkaline Solvent

“…The percentage composition of phase crystal structure obtained with Rietveld method using rietica software [31]. Standard of TiO2 used data from Inorganic Crystal Structure Database (ICSD) with a number for anatase 172916 [32] and rutile 109469 [33].…”

Preparation of barium hexaferrite coatings using atmospheric plasma spraying

“…Firstly, the reducing atmosphere of the Ar-H 2 plasma jets is known to cause a partial reduction of oxide ceramics: the formation of Ti suboxides during the deposition of TiO 2 coatings or the partial reduction of Cr 2 O 3 (with the possible appearance of metallic Cr in the coatings) are well-documented examples. [20][21][22] Secondly, the very rapid quenching of lamellae upon impact with the substrate favours the retention of metastable phases in thermally sprayed coatings. [23][24][25][26] Based on known thermodynamic data BaFe 12 O 19 is the most stable compound at 727-1727 • C. 14,27 Above 1727 • C the Fe 3 O 4 and FeO are in equilibrium with compounds having Fe/Ba = 2, 1, 2/3 or 2/5.…”

Acid‐induced bioactive titania surface

“…The deoxidization of TiO 2 is due to the cooling rate of the molten or partially molten droplets in excess of 10 6 K/s and low oxygen partial pressure during plasma spraying. 17 Rutile is a stable phase from the viewpoint of thermodynamics, whereas anatase is a metastable phase and will be transformed to rutile at about 1100 K. During plasma spraying, powders were heated and accelerated and then projected onto a substrate, followed by flattening, rapid cooling, and solidification processes. Most powders were melted and transformed into rutile in the plasma flame.…”

“…16 Plasma-sprayed titania coatings are used as an infrared radiation material and as a material for light bearing to resist wear. 17,18 The photocatalytic activity, photoabsorption, and electrical properties of plasma sprayed titania coatings have also been investigated by some researchers. 19,20 For biomaterials, plasmasprayed titania coatings on titanium alloy substrates as bond coatings and composite coatings have recently demonstrated promising corrosion behavior in vivo, acting as chemical barrier against the release of metal ions from the implant.…”