Formation of SrTiO3 in mechanically activated SrCO3–TiO2 system

Parlak, Tuğba Tunç; Apaydin, Fatih; Yıldız, Kenan

doi:10.1007/s10973-016-5385-y

Cited by 17 publications

(6 citation statements)

References 27 publications

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“…e reduction of peak intensities implied the formation of a partially amorphous structure in the highenergy-milled powders [12], which was related to the alteration of long-range lattice periodicity caused by large numbers of dislocations and their related strain fields [21]. However, no phase conversion occurred during the present high-energy milling process.…”

Section: Resultsmentioning

confidence: 81%

“…Furthermore, the endothermic peak of the 30-minute high-energy ballmilled reactant mixture (Figure 7(b)) occurred at a lower temperature and the peak area was smaller than the peak area of the 30-minute ball-milled reactant mixture (Figure 7(a)). is tendency is regulated by energy accumulation within or at the surface of crystals due to the limit of fragmentation of particles [21]. e TG and DSC analyses indicate that complete combustion was promoted by highenergy ball-milled duck eggshell + A-TiO 2 when Mg fuel was included in the reaction, which is further discussed in the next section.…”

Section: Resultsmentioning

confidence: 90%

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Calcium Titanate from Food Waste: Combustion Synthesis, Sintering, Characterization, and Properties

Cherdchom

Rattanaphan

Chanadee

2019

Advances in Materials Science and Engineering

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Calcium titanate (CaTiO 3 ) was combustion synthesized from a calcium source of waste duck eggshell, anatase titanium dioxide (A-TiO 2 ), and magnesium (Mg). e eggshell and A-TiO 2 were milled for 30 min in either a high-energy planetary mill or a conventional ball mill. ese powders were then separately mixed with Mg in a ball mill. After synthesis, the combustion products were leached and then sintered to produce CaTiO 3 ceramic. Analytical characterization of the as-leached combustion products revealed that the product of the combustion synthesis of duck eggshell + A-TiO 2 that had been high-energy-milled for 30 min before synthesis comprised a single perovskite phase of CaTiO 3 . e high-energy milling of the reactant powder had generated a large reactive surface area and induced structural defects, both of which drove the completion of the combustion reaction and the phase conversion of the reactants into the product. A calcium titanate ceramic, fabricated by sintering as-leached powdered combustion product at 1350°C for 180 min, achieved a maximum density of 3.65 g/cm 3 and a minimum porosity of 0.54%. e same fabricated calcium titanate ceramic product also exhibited the highest dielectric constant (∼78) and the lowest dielectric loss (∼0.02), which resulted from the simplified charge polarization process.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 90%

Calcium Titanate from Food Waste: Combustion Synthesis, Sintering, Characterization, and Properties

Cherdchom

Rattanaphan

Chanadee

2019

Advances in Materials Science and Engineering

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“…1 Strontium carbonate (SrCO 3 ) is widely used as a starting material for preparing a variety of Strontium compounds. [2][3][4] It has wide applications such as electronics and glass industries, as a constituent of magnetic ferrites, paints, medicine, dryers and in the manufacturing of metallic strontium and other strontium compounds. [5][6][7][8] SrCO 3 is currently produced from Celestite concentrates using the black ash and the double decomposition (direct conversion) processes.…”

Section: Introductionmentioning

confidence: 99%

“…Of the naturally occurring strontium compounds, only Strontianite (Strontium carbonate, SrCO 3 ) and Celestite (Strontium sulfate, SrSO 4 ) are of economic importance 1 . Strontium carbonate (SrCO 3 ) is widely used as a starting material for preparing a variety of Strontium compounds 2‐4 . It has wide applications such as electronics and glass industries, as a constituent of magnetic ferrites, paints, medicine, dryers and in the manufacturing of metallic strontium and other strontium compounds 5‐8 .…”

Section: Introductionmentioning

confidence: 99%

High‐efficiency mechanochemical synthesis of Strontium carbonate nanopowder from Celestite

Dayani

AmirArjmand²,

Nouri‐Khezrabad

et al. 2020

Int J Applied Ceramic Tech

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In this study, the conversion of Celestite to SrCO 3 was studied by wet mechanochemical synthesis in a high-energy ball mill and treatment with Na 2 CO 3. For this purpose, solid strontium carbonate and soluble Na 2 SO 4 were obtained after wet milling of Celestite powder and sodium carbonate. The solid phase was washed with water at room temperature by filter pressing. X-Ray diffraction patterns showed that the SrCO 3 nanopowder was synthesized and conversion boosted with increasing the milling time up to 8 hours Also, Rietveld refinement analysis was used to calculate the fraction of SrCO 3 as well as structural properties of synthesized samples. It was found that initial Celestite could be converted to strontium carbonate with a purity more than 98% using high-energy milling without simultaneous heating. The optimum milling time was determined as 4 hours resulting in formation of nanopowders with an average particle size around 90 nm. Field Emission Scanning Electron Microscopy (FE-SEM), clearly showed the nanoscale structure of the synthesized powders.

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“…In addition, the crystallization temperature of magnetite in glass is about 1050°C 26 . Herein, we choose SrCO 3 as the foaming agent due to its higher decomposition temperature of above 1050°C, and the generation of CO 2 can be realized by the decomposition of SrCO 3 27 …”

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confidence: 99%

Preparation and properties of ferrimagnetic glass–ceramic foams based on pyrite slag

Liu

Zhang

et al. 2022

Int J Applied Ceramic Tech

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By employing a melt-sintering method, we prepared a new type of ferrimagnetic glass-ceramic foam (FGCF) using ferrimagnetic glass-ceramic and foaming agent SrCO 3 . The ferrimagnetic glass-ceramics were fabricated based on pyrite slag by a melt-quenching method. The effects of foaming agent content, sintering temperature and time on microstructure, magnetic properties, microwave absorption performance, compressive strength, and thermal conductivity of the as-obtained FGCF were analyzed. This foaming process at 1100 • C for 40 min with 3-wt% SrCO 3 provided an FGCF with a bulk density of .693 g/cm 3 , a porosity of 63.60%, a specific saturation magnetic moment of 5.2 A m 2 /kg, a compressive strength of 2.61 MPa, a thermal conductivity of .241 W/(m K), and the calculated reflection loss of −12.1 dB for a layer thickness of 9 mm.

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Formation of SrTiO3 in mechanically activated SrCO3–TiO2 system

Cited by 17 publications

References 27 publications

Calcium Titanate from Food Waste: Combustion Synthesis, Sintering, Characterization, and Properties

Calcium Titanate from Food Waste: Combustion Synthesis, Sintering, Characterization, and Properties

High‐efficiency mechanochemical synthesis of Strontium carbonate nanopowder from Celestite

Preparation and properties of ferrimagnetic glass–ceramic foams based on pyrite slag

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