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.

Vijayaraghavan R

Department of Chemistry

School of Advanced Sciences

Vellore Campus

Boobalan kasilingam

Boobalan K

Vijayaraghavan rajagopalan

Chidambaram kuppanna

Chidambaram K

Mudali U.M.K

Raj B.

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.

&nbsp;

&nbsp;

VIT University

Journal of the American Ceramic Society

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

This study presents different fuels (Glycine and Urea) that can be used to synthesize nanocrystalline forsterite by the sol-gel combustion method. The weight change of precursor during thermal treatment was studied by thermo-gravimetric analysis (TGA). Pure forsterite was characterized by heating microscopy, Fourier transform infrared spectroscopy, X-ray Diffraction, Brunauer-Emmett-Teller, Scanning Electron Microscopy, and Energy dispersive X-ray spectroscopy. The HAP (hydroxyapatite) deposition ability, degradation and dissolution behaviour of forsterite was examined in simulated body fluid (SBF). The combusted forsterite precursor showed distinct thermal behaviour for each fuel when analyzed by heating microscopy. BET analysis showed that the particle size of forsterite synthesized using glycine was 28 nm, specific surface area 65.11 m2/g and average pore diameter 16.4 nm while using urea 1.951 μm, 0.939 m2/g, and 30.5 nm are the respective parameters. The dissolution of forsterite pointed to the consumption of Ca and P ions from SBF, the negligible release of Si ion into the SBF and these ionic interactions with SBF can be altered as per the material properties. The forsterite showed good antibacterial activity against S. aureus but lower activity against E. coli. The bactericidal activity of forsterite indicated that it can be used to inhibit biofilm formation in dental, bone implants and bacterial infection during surgical operations. © 2017 Elsevier B.V.

Materials Science and Engineering: C

Preparation of nanocrystalline forsterite by combustion of different fuels and their comparative in-vitro bioactivity, dissolution behaviour and antibacterial studies

Here, we are reporting the glowing combustion synthesis of Na2CaSiO4 powders for the first time at low temperature. L-alanine was used as reductant, and nitrates of sodium and calcium were used as oxidants. Phase evolution and formation was studied using X-ray diffraction (XRD), Fourier transform infrared (FTIR), Thermo gravimetric analysis-Differential thermal analysis (TGA-DTA) techniques. Powder morphology and particle size distribution were characterized using scanning electron microscopy (SEM), dynamic light scattering (DLS) techniques. Results confirms the formation of single phasic, microcrystalline sodium calcium silicate (Na2CaSiO4 phase) in cubic crystal system. Evaluation of hemolysis and (3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide) (MTT) tests suggest that Na2CaSiO4 powders exhibit negative response in in vitro conditions. Copyright © Taylor &amp; Francis Group, LLC.

Materials and Manufacturing Processes

Glowing Combustion Synthesis, Characterization, and Toxicity Studies of Na2CaSiO4Powders

Nanocrystalline N-doped ZnSb2O6 is synthesized in a single step in single phasic form by a novel combustion method.

RSC Adv.

Enhanced photocatalytic activity of nanocrystalline N-doped ZnSb2O6: role of N doping, cation ordering, particle size and crystallinity

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.

Ceramics International

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

Journal of Alloys and Compounds

Combustion synthesis of nanocrystalline Zr0.80Ce0.20O2: Detailed investigations of the powder properties

Dental Materials

Stabilized zirconia as a structural ceramic: An overview☆

Synthesis of nanocrystalline 8mol% yttria stabilized zirconia powder from sucrose derived organic precursors

Journal of Dentistry

An overview of zirconia ceramics: Basic properties and clinical applications

Metallurgical and Materials Transactions A

Aqueous Combustion Synthesis and Characterization of Nanosized Tetragonal Zirconia Single Crystals

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

Journal	Data powered by TypesetJournal of the American Ceramic Society
Publisher	Data powered by TypesetWiley
ISSN	0002-7820
Open Access	No