Synthesis and Characterization of Nanocrystalline Cr₂O₃ and ZrO₂ Ceramic Materials

Abstract

A novel methodology based on a hybrid approach has been evolved for synthesizing nearly monodisperse nanocrystalline oxides. The approach basically involves precipitation of gelatinous hydroxide in liquid phase hydrolysis and subsequent temperature programmed calcination to obtain nanocrystalline oxide. Cr2O3 and ZrO2 have been synthesized through this route. This paper describes synthesis procedures giving details of temperature windows required for this synthesis. In addition, solid state analytical technique like X-Ray Diffraction (XRD) and Photoluminescence (PL) have been used to characterize these materials. Especially PL was used to derive information on confinement effect. Transmission Electron Microscope (TEM), Scanning Probe Microscope (SPM), and Scanning Near Field Optical Microscope (SNOM) were used to derive morphology.

High temperature corrosion behaviour of ZrO2 reinforced Cr2O3 composite coatings in molten salt environment

“…Cladding of Cr 2 O 3 coating by HVOC has been widely studied for anti-corrosion application (Priyantha et al, 2003). Tyagi et al (2007) concluded that reinforcement of ZrO 2 in Cr 2 O 3 coating on ceramic material showed better corrosion resistance. Goyal et al (2018C) examined the hot corrosion behaviour of carbon nanotubes (CNTs)-reinforced chromium oxide composite coatings and resulted that corrosion resistance was found to be increasing with the increase in CNT content.…”

Electrochemical Synthesis and Characterization of Cr2O3 Nanostructures

“…Genel olarak, bu sentez yöntemleri katı faz yöntemi, sıvı faz yöntemi ve buhar fazı yöntemi olmak üzere üç ana kategoriye ayrılabilir. Cr 2 O 3 katı faz yöntemi olan termal ayrışma [40,41] yöntemi; sıvı faz yöntemleri olan mikroemülsiyon yöntemi [10], sol-jel yöntemi [42,43], çökeltme yöntemi [44][45][46], hidrotermal yöntemi [47,48], solvotermal yöntemi [49] ve mikrodalga yöntemi [50]; gaz faz yöntemleri olan kimyasal buhar yoğuşma fazı yöntemi [51], lazer buharı biriktirme yöntemi [52] ve metal organik kimyasal buharı biriktirme yöntemi [53]…”