English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The  (1-x) Mg 0.7 Zn 0.3 Fe 2 O 4  –  (x) Ba 0.7 Sr 0.3 TiO 3  composites with x = 0.40, 0.50 and 0.60 were prepared by solid state reaction under two step sintering. Two step sintering conditions were determined by the first step (T 1 ) at 1350 °C for holding time of 60 min and cooled down to the second sintering temperature (T 2 ) with different temperatures between 900 and 1100 °C for holding time of 5 h. The sample with high percentage of shrinkage and dense ceramic was obtained from  0.4 Mg 0.7 Zn 0.3 Fe 2 O 4 - 0.6 Ba 0.7 Sr 0.3 TiO 3  with sintering of T 2  at 1100 °C. XRD pattern showed combination of ferrite phase (Mg 0.7 Zn 0.3 Fe 2 O 4 ) and ferroelectric phase (Ba 0.7 Sr 0.3 TiO 3 ) and secondary phase of ZnO. Rietveld analysis confirmed main phases of Mg 0.7 Zn 0.3 Fe 2 O 4  and Ba 0.7 Sr 0.3 TiO 3 , including MgFe 2 O 4  and ZnO as secondary phase. It was found that the unit cell volume of Ba 0.7 Sr 0.3 TiO 3  was smaller than Mg 0.7 Zn 0.3 Fe 2 O 4  unit cell volume. Therefore, the short distance between ions of Ba 0.7 Sr 0.3 TiO 3  phase produced the dense composites with increasing ferroelectric phase contents. The average grain size of ceramic was in the range of 0.74–1.07 µm with grain square shape in Mg 0.7 Zn 0.3 Fe 2 O 4  phase and the average grain size of 0.59–0.70 µm with round oval shape in Ba 0.7 Sr 0.3 TiO 3  phase. The dielectric constant was between 0.8 × 10 3  and 5.4 × 10 3  in the temperature range of 275 °C − 360 °C. The highest dielectric constant was obtained from  0.6 Mg 0.7 Zn 0.3 Fe 2 O 4−0.4 Ba 0.7 Sr 0.3 TiO 3  with T 1  at 1350 °C with holding time for 60 min and T 2  at 900 °C with holding time for 5 h. The hysteresis measurement was carried out to determine saturation magnetization, remanent magnetization and coercivity of the composites. The results revealed that higher concentration of ferrite led to optimal magnetic properties.

Studies on structural, dielectrics and magnetics properties of two stage sintered ( 1-x ) Mg 0.3 Zn 0.7 Fe 2 O 3 – x Ba 0.7 Sr 0.3 TiO 3 composite