Influence of Al2O3 addition on microstructure, defects level and magnetic properties of LiTiZn ferrite ceramics

Малышев, А. В.; Petrova, A.B.; Суржиков, А. П.

doi:10.1016/j.ceramint.2018.08.073

Cited by 5 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We emphasize that in the case of Al2O3 adding, a different character of the temperature dependence transformation is observed, at which maximum with an increase in concentration to 0.5 wt.% shifts monotonically from the Curie point. In the case of both types of additives, a similar decrease in the maxima of the experimental temperature dependencies with an increase in the concentration of diamagnetic additives is observed [27].…”

Section: Temperature Dependencies Of the Initial Permeabilitysupporting

confidence: 65%

“…The other parameters do not change significantly with an increase in the ZrO2 additive concentration. Compared to the results of the Al2O3 adding to LiTiZn ferrite, the ZrO2 addition also causes a similar increase in the defect structure β/α and a reduction of µmax, but the character of the change in the position of the peak on the temperature scale Tm is different [27]. As it can be seen from the Table 2, the Tm first falls with an increase in the ZrO2 concentration up to 0.25 wt.% (shifts from the Curie point), and then sharply increases (a jump to the Curie point) with an increase in the ZrO2 concentration to 0.5 wt.%.…”

Section: Temperature Dependencies Of the Initial Permeabilitymentioning

confidence: 68%

“…The Curie point increases by more than 10 degrees if the ZrO2 concentration is 0.75 wt.% and above. This indicates the effect of additives on the chemical composition of ferrites [27].…”

Section: Temperature Dependencies Of the Initial Permeabilitymentioning

confidence: 79%

“…In this case, the micro-strain is practically independent of this parameter. Emphasize that the nature of the effect of ZrO2 additive on the X-ray structural parameters differs significantly from the previously discovered effect of Al2O3 additive on ferrite ceramics of the same composition [27].…”

Section: X-ray Diffraction Analysismentioning

confidence: 82%

See 3 more Smart Citations

Impact of ZrO2 additive on the microstructure, magnetic properties, and temperature dependence of the initial permeability of LiTiZn ferrite ceramics

Малышев

Petrova

Суржиков

2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

The effect of the diamagnetic ZrO2 addition on the microstructure and magnetic properties of LiTiZn ferrite ceramics, including the shape and parameters of the temperature dependence of the initial permeability, has been investigated. The defect structure of ferrite ceramic samples is assessed according to our earlier proposed method based on mathematical treatment of the experimental temperature dependencies of the initial permeability. The method is recommended for defects monitoring of soft ferrite ceramics and ferrite products. It was found that the defect structure of ferrite ceramics increased by 350% with an increase in the concentration of the ZrO2 additive in the range of (0-0.5) wt.%. In this case, for the same samples, the increase in the true physical broadening of reflections is only 20%, and the coercive force by 50%. Simultaneously, the maximum of the experimental temperature dependence of the initial permeability dropped by 45%.The microstructure of all samples is characterized with a similar average grain size according to the SEM data. However, samples with the 0.5wt.% of ZrO2 are characterized by the formation of conglomerates. A linear relationship was obtained between the defect structure and the width of the reflections, which indicates that this parameter is related to the elastic stress of ferrite ceramics.

show abstract

Section: Temperature Dependencies Of the Initial Permeabilitysupporting

confidence: 65%

Section: Temperature Dependencies Of the Initial Permeabilitymentioning

confidence: 68%

“…The Curie point increases by more than 10 degrees if the ZrO2 concentration is 0.75 wt.% and above. This indicates the effect of additives on the chemical composition of ferrites [27].…”

Section: Temperature Dependencies Of the Initial Permeabilitymentioning

confidence: 79%

Section: X-ray Diffraction Analysismentioning

confidence: 82%

See 2 more Smart Citations