Single phasic nanocrystalline CaZrO3 powder has been synthesized by glycine nitrate solution combustion method around 300 C using nitrate as oxidant and glycine as fuel. The as prepared product obtained as a result of combustion itself is crystalline and nearly single phasic CaZrO3 confirmed by X-ray diffraction (XRD). The product calcined at 600 C reveals carbonate free single phasic orthorhombic structured CaZrO3. To study the impact of oxidant to fuel ratio (O/F) and ignition temperature, a systematic variation of O/F and ignition temperature of combustion reaction has been investigated by analyzing the products through XRD in each case. These products have been characterized by XRD, Fourier Transform Raman spectroscopy, Thermal Analysis (TGA/DTA), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). Raman Spectrum reveals single phasic nanocrystalline perovskite CaZrO3. Spherical shaped particles were observed through SEM. TEM results also confirm the particles to be in nano regime (30-90 nm). © 2014 Elsevier Ltd and Techna Group S.r.l.

Vijayaraghavan R

Department of Chemistry

School of Advanced Sciences

Vellore Campus

Boobalan K

Varun A

Chidambaram K

Mudali U.K.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Ceramics International

This work reports on the preparation and characterization of mesoporous nano diopside (CaMgSi2O6) using a simple and cost-effective sol-gel combustion route. Stoichiometric oxidant/fuel ratio was adopted for the combustion reaction. Eggshell was used as a calcium source, glycine (fuel) as reductant, magnesium nitrate and nitric acid as oxidant were used in the preparation. The thermal behavior of the precursor was studied by thermo-gravimetric analysis (TGA) and heating microscopy. The temperature required for the transformation of the precursor into pure diopside was optimized at 1100 °C. Rietveld refinement method was utilized to confirm the phase purity of diopside. The resultant powder contains 36 nm particle with a specific surface area of 51 m2/g. The appearance of Ca, Mg, Si, and O peaks in EDX pattern confirmed the existence of essential elements. The rapid consumption of calcium and phosphorus ions from the simulated body fluid during dissolution indicated their involvement in apatite deposition on the surface of the nano diopside. FT-IR spectra showed that the Si[sbnd]O and Si[sbnd]O[sbnd]Si groups were replaced by phosphate bands due to hydroxyapatite deposition. The mechanical stability of the diopside after bioactivity studies was found to be superior to the cancellous bone. The release of alkaline earth ions (Ca2+ and Mg2+) from the diopside sample into the bacterial culture medium increases the pH (7.4), which inhibits the bacterial growth. The surface properties, concentration, and type of bacteria are the other factors responsible for the antibacterial activity of the nano diopside. © 2019 The Society of Powder Technology Japan

Advanced Powder Technology

Biomineralization, antibacterial activity and mechanical properties of biowaste derived diopside nanopowders

Nanocrystalline zirconium oxide powder has been prepared by the glowing combustion method using sucrose as the fuel and zirconyl nitrate as an oxidant in aqueous solution. The oxidant-to-fuel ratio was optimized (0.2) to prepare nanocrystalline zirconia. The influence of calcination temperature on the phase evolution of zirconia was also studied. The prepared powder was characterized by X-ray diffraction (XRD), fourier-transform infrared spectroscopy, thermal analysis, Raman spectroscopy, particle size analysis, scanning electron microscopy, transmission electron microscopy (TEM), and surface area analysis. Powder XRD pattern itself clearly revealed the presence of metastable tetragonal phase at room temperature. Raman spectrum revealed the presence of both tetragonal and monoclinic phases. TEM and surface area studies confirmed that the particles were in the nanoregime (5-30 nm). © 2010 The American Ceramic Society.

Journal of the American Ceramic Society

Preparation and Characterization of Nanocrystalline Zirconia Powders by the Glowing Combustion Method

Fabrication and properties of CaZr0.9In0.1O3−δ prepared by an auto-ignition combustion process

Physics and Chemistry of Minerals

Structural investigations of (Ca,Sr)ZrO3 and Ca(Sn,Zr)O3 perovskite compounds

Journal of Alloys and Compounds

Some observations on synthesis and electrolytic properties of nonstoichiometric calcium zirconate

Effect of propellant on the combustion synthesized Sr-doped LaMnO3 powders

Facile, scalable synthesis of nanocrystalline calcium zirconate by the solution combustion method

Journal	Data powered by TypesetCeramics International
Publisher	Data powered by TypesetElsevier BV
ISSN	0272-8842
Open Access	No