Microstructural, mechanical and electrical properties of BT, BZT-BCT, and BNT-BT-BKT ferroelectrics synthesized by mechanochemical route

Swain, Sujata; Kumar, P.; Sonia, .

doi:10.1016/j.ceramint.2021.06.064

Cited by 17 publications

(7 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface microstructures of the sintered samples were studied by using field emission scanning electron microscope (FESEM, NOVA Nano-SEM). The diametral tensile strength (σ) of the sintered HAp samples was measured by a universal testing machine by using the formula provided below [16]:…”

Section: Methodsmentioning

confidence: 99%

Mechanical, Electrical, and Biological Properties of Mechanochemically Processed Hydroxyapatite Ceramics

et al. 2021

Self Cite

View full text Add to dashboard Cite

The effect of the sintering temperature on densification and the resultant mechanical, electrical, and biological properties of mechanochemically processed hydroxyapatite (HAp) samples was investigated. HAp samples were sintered at 1200, 1250, and 1300 °C for 4 h, respectively. HAp samples sintered at 1250 °C showed better mechanical properties, which was attributed to their smaller grain size compared to HAp samples at higher sintering temperatures. The nearly identical value of the dielectric constant (εr) and better cell proliferation was exhibited by HAp samples sintered at 1250 and 1300 °C, respectively. At ~210 °C, in all the samples sintered at different temperatures, a dielectric anomaly was obtained, which was attributed to the phase transition temperature of the HAp system. Dielectric properties near the phase transition temperature showed a dielectric relaxation-type of behavior, which was attributed to the re-orientational motion of OH− ions in the HAp system. Higher cell proliferation and viability were exhibited by the HAp1300 samples, whereas comparatively equivalent cell growth and higher mechanical strength were observed in the HAp1250 samples.

show abstract

Section: Methodsmentioning

confidence: 99%

Mechanical, Electrical, and Biological Properties of Mechanochemically Processed Hydroxyapatite Ceramics

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…The increase in the density of nanocomposite compacts can be achieved by increasing the sintering temperature. The bulk density of all the sintered nanocomposite compacts increased with the increase in the BT content, which could be attributed to the higher density of BT (∼6 g cc −1 ) as compared to HA (∼2.8 g cc −1 ) [27,40]. The lower value of bulk density (3.34 ± 0.003 g cc −1 ) was found for the 20HA/80BT nanocomposite compact.…”

Section: Density and Microstructure Analysis Of Shbncsmentioning

confidence: 85%

Physicochemical, mechanical, dielectric, and biological properties of sintered hydroxyapatite/barium titanate nanocomposites for bone regeneration

Swain¹,

Bhaskar²,

Narayanan³

et al. 2023

Biomed. Mater.

Self Cite

View full text Add to dashboard Cite

Bone implants fabricated using nanocomposites containing hydroxyapatite and barium titanate showed piezoelectricity, osteoconductive, osteoinductive, and osteointegration properties for bone regeneration applications. In our present study, hydroxyapatite (HA) and barium titanate (BT) nanopowders were synthesized using high-energy ball-milling (HEBM)-assisted solid-state reaction with precursors of calcium carbonate and ammonium dihydrogen phosphate, and barium carbonate and titanium oxide powder mixtures, respectively. Hexagonal HA and tetragonal BT phases were formed after calcination at 700 and 1000 °C, respectively. Subsequently, HA/BT nanocomposites with different weight percentages of HA and BT were prepared by ball-milling, then compacted and sintered at two different temperatures to endow these bioceramics with better mechanical, dielectric, and biological properties for bone regeneration. Microstructure, crystal phases, and molecular structure characterizations of these sintered HA/BT nanocomposite compacts (SHBNCs) were performed using field-emission scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy, respectively. Bulk density was evaluated using the Archimedes method. HA/BT nanocomposites with increased BT content showed enhanced dielectric properties, and the dielectric constant (εr) value for 5HA/95BT was ~182 at 100 Hz. Mechanical properties such as Vicker's hardness, fracture toughness, yield strength, and diametral tensile strength were also investigated. The hemolysis assay of SHBNCs exhibited hemocompatibility. The effect of these SHBNCs as implants on the in vitro cytocompatibility and cell viability of MG-63 osteoblast-like cells was assessed by MTT assay and live/dead staining, respectively. 15HA/85BT showed increased metabolic activity with a higher number of live cells than BT after the culture period. Overall, the sintered HA/BT nanocomposite compacts can be used as orthopedic implants for bone regeneration applications.

show abstract

“…These values are smaller in comparison to BTCS x=0.05 system prepared by conventional ball milling [5]. An asymmetry in the PE loop is easily observed which is due to the domain pinning effect caused by defects [10].…”

Section: Pe (Hysteresis) Loop Studymentioning

confidence: 95%

Phase transition and ferroelectric properties study of lead-free 0.95BaTiO₃-0.05CaSnO₃ ceramics synthesized by high energy ball milling assisted solid state reaction route

Kar

Swain

Kumar

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Lead-free 0.95BaTiO3-0.05CaSnO3 ceramics were synthesized by high energy ball milling (HEBM) assisted solid state reaction route. Calcination temperature and time for phase formation was optimized and found to be relatively less than other BaTiO3-doped system. X-ray diffraction (XRD) and Raman study were performed for phase examination of the synthesized material. Rietveld analysis confirmed double-phase co-existence of this 95/05 system at room temperature. Sintering temperature and time for better densification were optimized to be 1250°C for 3hr. From dielectric study it was found that ferroelectric-paraelectric phase transition temperature(Tc, observed≈ 55°C) was reduced considerably in compared to the pure BaTiO3 system (Tc≈ 125°C). No relaxorbehaviour was found from dielectric study. Polarization vs. electric field hysteresis loop study showed the development of saturated hysteresis loops but the remnant polarization was found decreased compared to pure BaTiO3 system.

show abstract

Microstructural, mechanical and electrical properties of BT, BZT-BCT, and BNT-BT-BKT ferroelectrics synthesized by mechanochemical route

Cited by 17 publications

References 37 publications

Mechanical, Electrical, and Biological Properties of Mechanochemically Processed Hydroxyapatite Ceramics

Mechanical, Electrical, and Biological Properties of Mechanochemically Processed Hydroxyapatite Ceramics

Physicochemical, mechanical, dielectric, and biological properties of sintered hydroxyapatite/barium titanate nanocomposites for bone regeneration

Phase transition and ferroelectric properties study of lead-free 0.95BaTiO₃-0.05CaSnO₃ ceramics synthesized by high energy ball milling assisted solid state reaction route

Contact Info

Product

Resources

About

Microstructural, mechanical and electrical properties of BT, BZT-BCT, and BNT-BT-BKT ferroelectrics synthesized by mechanochemical route

Cited by 17 publications

References 37 publications

Mechanical, Electrical, and Biological Properties of Mechanochemically Processed Hydroxyapatite Ceramics

Mechanical, Electrical, and Biological Properties of Mechanochemically Processed Hydroxyapatite Ceramics

Physicochemical, mechanical, dielectric, and biological properties of sintered hydroxyapatite/barium titanate nanocomposites for bone regeneration

Phase transition and ferroelectric properties study of lead-free 0.95BaTiO3-0.05CaSnO3 ceramics synthesized by high energy ball milling assisted solid state reaction route

Contact Info

Product

Resources

About

Phase transition and ferroelectric properties study of lead-free 0.95BaTiO₃-0.05CaSnO₃ ceramics synthesized by high energy ball milling assisted solid state reaction route