Showing papers in "Transactions of The Indian Ceramic Society in 2019"
TL;DR: In this paper, a novel Eu3+ doped MGdAl3O7 (Mg, Ca, Sr and Ba) phosphors were synthesized and examined at 600°C using solution-combustion procedure and investigated at 0.01 to 0.05 mo
Abstract: Novel Eu3+ doped MGdAl3O7 (M = Mg, Ca, Sr and Ba) phosphors were synthesized and examined. The samples were prepared at 600°C using solution-combustion procedure and investigated at 0.01 to 0.05 mo...
19 citations
TL;DR: The mechanical properties and durability parameters such as wet-dry cycles, water sorptivity, efflorescence and acid resistance of geopolymer concrete synthesized from fly ash of three different or...
Abstract: The mechanical properties and durability parameters such as wet-dry cycles, water sorptivity, efflorescence and acid resistance of geopolymer concrete synthesized from fly ash of three different or...
17 citations
TL;DR: In this article, thermal barrier coatings (TBCs) are used to protect turbine blades of aircraft engines from oxidation and thermal conductivity degradation at elevated temperatures, and they have low thermal conductivities and high resistance to oxidation.
Abstract: Thermal barrier coatings (TBCs) typically have low thermal conductivity and high resistance to oxidation at elevated temperatures. TBCs are used to protect the turbine blades of aircraft engines op...
14 citations
TL;DR: In this paper, AA6082-T6 thin aluminium alloy plates of 2 mm thickness were friction stir welded using fine ceramic Al2O3 nanoparticles as the reinforcing materials between the adjo...
Abstract: In this present investigation, AA6082-T6 thin aluminium alloy plates of 2 mm thickness were friction stir welded using fine ceramic Al2O3 nanoparticles as the reinforcing materials between the adjo...
13 citations
TL;DR: Dual mixed slurry for AA6061/Al2O3-Al powder was formed under argon gas protection and used to fabricate composite due to the effect of free vortex flow in semi-solid stage as discussed by the authors.
Abstract: Dual mixed slurry for AA6061/Al2O3-Al powder was formed under argon gas protection and used to fabricate composite due to the effect of free vortex flow in semi-solid stage. Initially, Al2O3 reinfo...
13 citations
TL;DR: Strontium bismuth niobate (SBN), K0.025Sr0.95Gd0.1Bi2Nb2O9 (KSGBN3)) ceramics were prepared by two stage solid s... as discussed by the authors.
Abstract: Strontium bismuth niobate (SrBi2Nb2O9 (SBN), K0.025Sr0.95Gd0.025Bi2Nb2O9 (KSGBN1), K0.05Sr0.9Gd0.05Bi2Nb2O9 (KSGBN2) and K0.1Sr0.8Gd0.1Bi2Nb2O9 (KSGBN3)) ceramics were prepared by two stage solid s...
12 citations
TL;DR: In this article, the problem of dispersing zirconia powder in aqueous suspension using a suitable dispersant for coating application was studied and Zeta potential experiments were conducted in search of stable suspensions.
Abstract: Dispersion of zirconia powder in aqueous suspension using suitable dispersant for coating application was studied. Zeta potential experiments were conducted in search of stable suspensions....
12 citations
TL;DR: In this article, a novel CNTs/α-Fe2O3/PPy composite with three-dimensional interconnected network structure is successfully synthesized through a solvothermal method and in-situ polymerization.
Abstract: A novel CNTs/α-Fe2O3/PPy composite with three-dimensional interconnected network structure is successfully synthesized through a solvothermal method and in-situ polymerization. The as-synthesized C...
12 citations
TL;DR: In this article, the authors present the effects of concrete waste incorporating dolomite aggregate on ceramic-based manufacturing processes and show that concrete waste can pollute and damage the environment.
Abstract: Ceramic industry generates a large amount of wastes, which pollutes and damages the environment. This paper presents the effects of concrete waste incorporating dolomite aggregate on ceramic-based ...
11 citations
TL;DR: In this paper, rare earth aluminates (ReAlO3) produced via microwave assisted synthesis have good powder flowability and is an ideal material for thermal spray coating process.
Abstract: Rare-earth aluminate (ReAlO3, Re = La, Gd, Nd, Y) powders were successfully synthesized from a mixture of Re2O3 (Re = La, Gd, Nd, Y) and Al2O3 powders using microwave assisted synthesis which consists of two steps: microwave heat treatment and high-energy milling process. X-ray diffraction, laser particle size analyzer, nitrogen adsorption technique (BET) and scanning electron microscopy were employed to study the phase composition, particle size and distribution, specific surface area and powder morphology. The results suggest that microwave assisted method led to a very rapid synthesis of ReAlO3 compared to conventional solid-state reaction process. The crystals produced by microwave assisted synthesis have a perovskite structure and the particle size distribution ranges from 3.6-51.5 µm. The present work demonstrates that rare-earth aluminates (ReAlO3) produced via microwave assisted synthesis have good powder flowability and is an ideal material for thermal spray coating process.
11 citations
TL;DR: NicNickel-cobalt ferrite (NCF) without Sn-dopant and with (x = 0 to 0.1%), (Ni 0.7Co 0.4+ d) have been synthesized through solid-state route.
Abstract: Nickel-cobalt ferrite (NCF) without Sn-dopant and with (x = 0 to 0.1%), (Ni0.7Co0.3)(Fe2–xSnx)O4+ d, have been synthesized through solid-state route. Calcination of oxides at 900°C yielded spinel p...
TL;DR: In this article, a local mineral (silica sand) obtained from Hazara division, Khyber Pakhtunkhwa, Pakistan was fabricated into soda-lime silicate glass and Titanium dioxide (TiO2) concentration in the range of 1-3 wt% was added as a nucleating agent to investigate its effect on crystallization phase, density, hardness, thermal expansion coefficient (α), glass transition temperature (Tg), micro hardness and optical bandgap.
Abstract: In this study, local mineral (silica sand) obtained from Hazara division, Khyber Pakhtunkhwa, Pakistan was fabricated into soda-lime silicate glass. Titanium dioxide (TiO2) concentration in the range of 1-3 wt% was added as a nucleating agent to investigate its effect on crystallization phase, density, hardness, thermal expansion coefficient (α), glass transition temperature (Tg), micro hardness and optical bandgap of soda-lime silicate glass. XRD analysis revealed the formation of different crystalline phases such as cristobalite (SiO2), wollastonite (CaSiO2), and rutile (unrefined TiO2, often with iron, F3+) at different processing temperatures. The coefficient of thermal expansion and the optical gap energies varied from 72.5×10–7/K to 77×10–7/K and 3.71-3.93 eV with TiO2 concentration, respectively. The mechanical properties were also in good agreement with those of commercially used glass-ceramics.
TL;DR: In this paper, the corrosion behavior of titanium composites of titanium-titanium boride composites for marine applications was investigated by conducting electrochemical polarization experiments in the laboratory.
Abstract: In this work, the corrosion behavior of titanium composites of titanium-titanium boride composites for marine applications was investigated by conducting electrochemical polarization experiments in...
TL;DR: In this article, microstructures, mechanical properties, thermal shock resistance, as well as oxidation resistance of short carbon fiber (Cf) and nano ZrB2 enhanced SiC-BN ceramics were investigated systema...
Abstract: Microstructures, mechanical properties, thermal shock resistance, as well as oxidation resistance of short carbon fiber (Cf) and nano ZrB2 enhanced SiC-BN ceramics were investigated systema...
TL;DR: Porous silicon carbide ceramics were prepared by an in situ reaction bonding process using clay and alumina as additives as mentioned in this paper. The effects of alumina additive, pore former on phase composition,...
Abstract: Porous silicon carbide ceramics were prepared by an in situ reaction bonding process using clay and alumina as additives. The effects of alumina additive, pore former on phase composition, ...
TL;DR: In this paper, the production of steatite containing ceramic insulators as thermostat material was realized by investigating the composition, pressing pressure and sintering temperature of the material.
Abstract: In this study, production of alumina and steatite containing ceramic insulators as thermostat material was realized by investigating the composition, pressing pressure and sintering temperature. 90...
TL;DR: In this paper, light-weight insulation materials were prepared with calcined flint clay as the main material and sawdust was infused by sols as a pore forming agent.
Abstract: In this study, light-weight insulation materials were prepared with calcined flint clay as the main material and sawdust was infused by sols as a pore forming agent. Micro-porosity and properties of the prepared insulation materials were investigated and were found to have better comprehensive properties. Apparent porosity, bulk density and cold crushing strength of the compositions containing 40 wt% calcined flint clay, fired at 1400°C for 3 h, were found to be 71%, 0.85 g.cm–3 and 2.65 MPa, respectively. Thermal conductivity of the material was 0.133 W.m–1.K –1 at 300°C. When sawdust was soaked by 0 wt% sol, microstructure of the materials showed irregular pores. When sawdust was infused with 7 wt% alumina sol, the micropores were wrapped with larger pore. Meanwhile, the original pore was refined, and cold crushing strength and thermal conductivity were also optimized. When the sawdust was soaked in alumina sol, the cold crushing strength increased to 3.3 MPa and the thermal conductivity decreas...
TL;DR: In this paper, the effect of microwave sintering on the properties of scandia doped zirconia (10 mol% Scandia in ZIRconia) was investigated.
Abstract: In this work, the effect of microwave sintering on the properties of scandia doped zirconia (10 mol% scandia in zirconia) was investigated. The sample was prepared by mixed oxide method and the sin...
TL;DR: In this paper, a mixture of hydroxapatite (HAp) and tricalcium phosphate (β-TCP) powders was used to synthesize Biphasic calcium phosphate (BCP) ceramics, which were then pressed and sintered at 1200o and 1250oC.
Abstract: Biphasic calcium phosphate (BCP) ceramics was synthetically prepared by ex-situ method using hydroxyapatite (HAp) and beta tricalcium phosphate (β-TCP) powders. Both HAp and β-TCP were prepared by wet chemical co-precipitation and calcination method and were then mixed at two different weight ratios of 60:40 and 70:30. The mixed BCPs were then pressed and sintered at 1200o and 1250oC. Sintered pure HAp and β-TCP were also prepared for comparison purpose. Sintered products were then characterized for various properties. Higher density and strength values were found for the composition with higher HAp content and also the bioactivity on immersion in SBF (simulated body fluid) solution was found to be higher for HAp containing composition.
TL;DR: Based on X-ray diffraction data, it is identified that a spinel-type structure of Li ferri... as discussed by the authors, Li and magnesium ferrites have been synthesized using EDTA/EG assisted sol-gel method.
Abstract: In this study, lithium and magnesium ferrites have been synthesized using EDTA/EG assisted sol-gel method. Based on X-ray diffraction data, it is identified that a spinel-type structure of Li ferri...
TL;DR: The influence of grain size (7-16 nm) on electrical conductivity, dielectric properties and magnetic field dependent I-V characteristics along with magnetoresistance have been studied for zinc ferr... as discussed by the authors.
Abstract: The influence of grain size (7-16 nm) on electrical conductivity, dielectric properties and magnetic field dependent I–V characteristics along with magnetoresistance have been studied for zinc ferr...
TL;DR: In this article, a cleaning of coal resulted in ash reduction, heat value enhancement, increased reactive maceral content and change in ash composition influencing combustion performance, and with washed fractions, trend...
Abstract: Cleaning of coal resulted in ash reduction, heat value enhancement, increased reactive maceral content and change in ash composition influencing combustion performance. With washed fractions, trend...
TL;DR: In this paper, a comprehensive discussion of hydroxyapatite (HAp) formation from human and bovine bones is presented and the phase formation and surface morphologies of prepared HAp powders are determined.
Abstract: This study represents a comprehensive discussion of hydroxyapatite (HAp) formation from human and bovine bones The phase formation and surface morphologies of prepared HAp powders were determined
TL;DR: In this article, the ternary compounds of rare earth uranium oxides, RE6UO12 (RE = La, Nd, Sm, Eu, Gd) were measured by inverse drop calorimetry in the temperature range 533-1738K.
Abstract: Enthalpy increments of the ternary compounds of rare earth uranium oxides, RE6UO12 (RE = La, Nd, Sm, Eu, Gd) were measured by inverse drop calorimetry in the temperature range 533-1738K. These compounds (RE6UO12) were prepared by gel combustion synthesis and characterized by XRD. From the measured enthalpy increment values, thermodynamic functions, viz. heat capacity, entropy, Gibb's energy functions were computed. The trend in variation of heat capacity was in the order: Eu6UO12>Sm6UO12>Nd6UO12>La6UO12>Gd6UO12. This trend is explained based on (i) phonon (ii) dilatational and (iii) Schottky contributions to the heat capacity. The trend in variation of heat capacity of RE6UO12 is similar to that of RE2O3.
TL;DR: In this paper, two series of semi-conducting glazes based on cassiterite phase were prepared and characterized after application on electrical porcelain bodies, in one series, semiconducting fraction of the fina...
Abstract: Two series of semi-conducting glazes based on cassiterite phase were prepared and characterized after application on electrical porcelain bodies. In one series, semi-conducting fraction of the fina...
TL;DR: In this article, the thermal shock resistance of Si-Hf-C-N(O) foams at temperatures varying from 800o-1000oC subjected to multiple thermal cycles was investigated.
Abstract: Thermal shock resistance of precursor derived Si-Hf-C-N(O) foams at temperatures varying from 800o-1000oC subjected to multiple thermal cycles was investigated. The as-synthesized foams possessed i...
Abstract: Lead-iron phosphate (LIP) glasses are a promising new waste form for safe immobilization of both high level defence and high level commercial radioactive waste for long term disposal. LIP glasses h...
TL;DR: In this paper, the effects of sintering temperature, heating rate, holding time, and additive additive on the properties of single-phase indium tin oxide (ITO) target were investigated.
Abstract: The effects of sintering temperature, heating rate, holding time and sintering additive on the properties of single-phase indium tin oxide (ITO) target, prepared by normal pressure sintering method...