2018
DOI: 10.2298/sos1801029k
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Effect of chemical composition on microstructural properties and sintering kinetics of (Ba,Sr)TiO3 powders

Abstract: Barium strontium titanate powders with different Ba:Sr ratios were investigated to determine the influence of the initial composition of powder mixture on microstructural properties and sintering kinetics. It was determined that BaCO 3 and SrCO 3 react differently to mixing, resulting in Ba 0.5 Sr 0.5 CO 3 in the sample with 80% Ba and different contents of Ba 1-x Sr x TiO 3 in samples with 50% and 20% Ba. In addition, the morphology is also different, with higher Sr content leading to larger particles size an… Show more

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Cited by 8 publications
(8 citation statements)
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“…The density of samples STO0 and STO10 does not change noticeably until the temperature reaches value of around 1100 o C, while it rapidly increases above 1230 o C. In the case of samples STO30 and STO120, density begins to gradually increase at lower temperatures (around 750 and 550 o C, respectively), with a sharp rise above 1200 o C. The final densities, obtained after non-isothermal annealing up to 1300 o C and isothermal holding at this temperature for 2 h, were higher for the STO10 (ρ ~ 4.08 g/cm 3 ) and STO30 (ρ ~ 4.04 g/cm 3 ) samples, compared to the STO120 (ρ ~ 3.96 g/cm 3 ) and STO0 (ρ ~ 3.59 g/cm 3 ) samples. Fig.…”
Section: Resultsmentioning
confidence: 92%
See 1 more Smart Citation
“…The density of samples STO0 and STO10 does not change noticeably until the temperature reaches value of around 1100 o C, while it rapidly increases above 1230 o C. In the case of samples STO30 and STO120, density begins to gradually increase at lower temperatures (around 750 and 550 o C, respectively), with a sharp rise above 1200 o C. The final densities, obtained after non-isothermal annealing up to 1300 o C and isothermal holding at this temperature for 2 h, were higher for the STO10 (ρ ~ 4.08 g/cm 3 ) and STO30 (ρ ~ 4.04 g/cm 3 ) samples, compared to the STO120 (ρ ~ 3.96 g/cm 3 ) and STO0 (ρ ~ 3.59 g/cm 3 ) samples. Fig.…”
Section: Resultsmentioning
confidence: 92%
“…In the fabrication process of the advanced electroceramics materials, preparation conditions, and especially sintering, are important factors which can significantly affect the mechanical and functional properties of these materials [1,2]. Strontium-titanate (SrTiO 3 ) is a very attractive functional electroceramic material because of its remarkably high dielectric permittivity, tunability and low microwave loss [3,4]. The high dielectric constant of SrTiO 3 allows its usage in high-storage-density capacitors (dynamic random access memory-DRAM), and various microwave devices [5][6][7].…”
Section: Introductionmentioning
confidence: 99%
“…The inset (a) does not show the (002) XRD peak at lower 2θ values, next to the (200) one for all the x values, which indicates that the films are constituted only by the cubic phase [17,18]. The inset (b) shows two small peaks, pointed out with asterisks, sited in the 552θ75°interval, which were discarded as coming from other BSTO phases, these signals more probable are impurities that were originated by carbon-based oxides from the chamber ambient [19,20].…”
Section: Resultsmentioning
confidence: 94%
“…8 %) associated with spinel phase formation from alumina and magnesia inhibits formation of dense bodies in a single-stage reaction sintering process [24]. Also, as the time of mechanical activation increased, the temperature corresponding to the onset of shrinkage noticeably decreased from ~ 1409 °C in AM-0 to ~ 1340 o C in AM-120 [32,33]. Furthermore, with the prolonged mechanical activation, the apparent decrease in expansion was due to the lower energy needed for spinel reaction [18].…”
Section: Resultsmentioning
confidence: 99%