Fe2O4 Composite Research Articles

Synergistic role of N-doped carbon quantum dots on Zn-doped cobalt ferrite (N-CQDs/ZnCF) for the enhanced photodegradation of oxytetracycline under visible light

N-doped carbon quantum dots/Zn0.4Co0.6Fe2O4(N-CQDs/ZnCF) composite was successfully synthesized by a hydrothermal method.XRD, HR-TEM, UV–Vis/DRS,PL, andXPSwere used to characterize the synthesized nanoparticles. The band gap energies of the synthesized nanomaterials were found to be less than 2 eV. PL results confirmed improved separation efficiency of photo-generated carriers on the N-CQDs/ZnCF. Additionally, HR-TEM images showed quasi-spherical and cubic morphology for both N-CQDs and ZnCF, respectively. The XPS survey spectra of 10% N-CQDs/ZnCF confirmed the presence of Zn2+, Co2+, Fe3+, N, O, and C on surfaces of N-CQDs/ZnCF. The pristine NPsand N-CQDs/ZnCF NCswere tested for the photodegradation of oxytetracycline, under visible light irradiation. The 10% N-CQDs/ZnCF nanocomposite showed the highest photocatalytic activity of up to 98% in 100 min. This enhancement was attributed to the synergistic effect of N-CQDs and ZnCF in the heterojunction, which promotes charge carrier separation and boosts photoactivity in degrading OTC.

In-situ synthesis of NiCo/(Ni,Co)O/(Ni,Co)Fe2O4 composite as high-performance microwave absorber

NiCo/(Ni,Co)O/(Ni,Co)Fe2O4 composites were in-situ prepared by solution combustion method using metal nitrates as oxidant and glycine as organic fuel. The amounts of various intermetallic and oxide phases were controlled by amounts of metal precursor. The magnetic properties proved the presence of Ni1-xCox phase instead of pure Ni and Co phases. The combusted composites showed spongy microstructure without any special morphology for various phases. The (Ni,Co)O-49 wt % NiCo composite powders had the effective absorption bandwidth (EAB) of 3.6 GHz at a matching thickness (1.8 mm) in Ku band. By using the ferric precursor, the (Co,Ni)O-30 wt %NiCo-15 wt % (Co,Ni)Fe2O4 composite exhibited a rather broader EAB of 3.9 GHz at a smaller matching thickness of 1.2 mm in Ku band.

Wave-absorbing properties of Ni-Zn ferrites loaded on coal-based, densely porous light carbon functional materials

Composites obtained from coal-based porous carbon (CPC)–loaded Ni-Zn ferrite often have good wave absorption properties. Here, CPC/Ni0.8Zn0.2Fe2O4 composite was innovatively prepared by microwave solid-phase reaction. The effects of microwave power and time on the sintering of the Ni-Zn ferrite precursor powder were explored, as were the effects of the CPC pore structure and the mass ratio of CPC to Ni-Zn ferrite on the wave absorption properties of the composites. Results showed that the CPC matched well with the Ni-Zn ferrite, especially at a 50% ratio at which the composite attained a maximum attenuation of −20.8 dB at 15.2 GHz with an effective bandwidth of 4.4 GHz. The CPC broadened the wave absorption performance of Ni-Zn ferrite and the resulting composite had excellent wave absorption performance that could meet the requirements of multiple frequency bands by adjusting the coating thickness.

Enhanced dielectric, ferroelectric, and ferromagnetic responses of BaZr0.2Ti0.8O3–Ni0.5Zn0.5Fe2O4 multiferroic ceramic composite

Pure BaZr0.2Ti0.8O3, pure Ni0.5Zn0.5Fe2O4, and 80BaZr0.2Ti0.8O3–20Ni0.5Zn0.5Fe2O4, 70BaZr0.2Ti0.8O3–30Ni0.5Zn0.5Fe2O4, and 60BaZr0.2Ti0.8O3–40Ni0.5Zn0.5Fe2O4 multiferroic composites were prepared by a solid-state sintering method, and their structural, morphological, electrical (dielectric and ferroelectric), and magnetic properties were analyzed. A perovskite tetragonal phase (BaZr0.2Ti0.8O3) and a cubic spinel phase (Ni0.5Zn0.5Fe2O4) were simultaneously present in each composite. Peak shifting toward higher angles was observed for the 80BaZr0.2Ti0.8O3–20Ni0.5Zn0.5Fe2O4 and 70BaZr0.2Ti0.8O3–30Ni0.5Zn0.5Fe2O4 composites. BaZr0.2Ti0.8O3 part of all the composites demonstrated tensile strain value, while Ni0.5Zn0.5Fe2O4 part exhibited compressive strain values. A grain growth reduction phenomenon was observed with increasing Ni0.5Zn0.5Fe2O4 content in the composites. The largest average grain size was obtained for 80BaZr0.2Ti0.8O3–20Ni0.5Zn0.5Fe2O4 (933.23 ​nm), while the values for 70BaZr0.2Ti0.8O3–30Ni0.5Zn0.5Fe2O4 and 60BaZr0.2Ti0.8O3–40Ni0.5Zn0.5Fe2O4 composites were 843.07 ​nm, 718.35 ​nm, respectively. All composites exhibited giant dielectric constants because of the electron hopping phenomenon between ​Fe2+and ​Fe3+. The 60BaZr0.2Ti0.8O3–40Ni0.5Zn0.5Fe2O4 composite exhibited the highest dielectric constant of 88217.31 ​at 100 ​Hz. Similarly, it showed an enhanced dielectric loss of 2.77 (at 100 ​Hz). The 80BaZr0.2Ti0.8O3–20Ni0.5Zn0.5Fe2O4 composite exhibited the highest remnant polarization (13.58 ​μC ​cm−2), charge density (0.28 ​J ​cm−3), and discharge density (0.20 ​J ​cm−3) among the synthesized composites. However, 70BaZr0.2Ti0.8O3–30Ni0.5Zn0.5Fe2O4 exhibited the largest energy storage efficiency of 75%. Although pure BaZr0.2Ti0.8O3 did not show any response to an applied magnetic field, meaningful hysteresis loops were obtained for pure Ni0.5Zn0.5Fe2O4 and the (1-x)BaZr0.2Ti0.8O3-xNi0.5Zn0.5Fe2O4 composites. In addition, 60BaZr0.2Ti0.8O3–40Ni0.5Zn0.5Fe2O4 showed the highest saturation magnetization (17.52 emu/g) and remnant magnetization (0.92 emu/g) among the synthesized composites. Eventually, (1-x)BaZr0.2Ti0.8O3-xNi0.5Zn0.5Fe2O4 composites showed better performance compared to pure BaZr0.2Ti0.8O3 and Ni0.5Zn0.5Fe2O4 ceramics.

Enhanced Microwave Absorption of Reduced Graphene Oxide/Ni0.4Zn0.4Co0.2Fe2O4 Composite at Ultrathin Thickness

Reduced graphene oxide (rGO)-anchored Ni0.4Zn0.4Co0.2Fe2O4 (NZCF) composites were successfully synthesized by a hydrothermal process and then mixed with paraffin wax. The phase composition and microstructure were investigated by Fourier transform infrared (FT-IR) spectroscopy, x-ray diffraction, and scanning electron microscopy. The results confirmed that the rGO particles covered the modified ferrite grains, and the NZCF particles exhibited a typical spinel structure with the characteristic of the Fd3m cubic groups. In addition, the electromagnetic parameters were measured via a vector network analyzer. The composites with paraffin wax exhibited excellent electromagnetic wave absorption performance, comparable or superior to that of most reported absorbers. The reflection loss was excellent, with a value of −47.10 dB with ultralow thickness of only 0.44 mm obtained from the rGO/NZCF composite with paraffin volume fraction of 20%, and the maximum bandwidth reached 3.7 GHz with merely 1.5 mm in thickness. Therefore, the rGO/Ni0.4Zn0.4Co0.2Fe2O4 composites are potential candidates for electromagnetic wave absorption applications.

Facile synthesis of nitrogen-doped reduced graphene oxide/nickel-zinc ferrite composites as high-performance microwave absorbers in the X-band

Nowadays, developing high-performance microwave absorbers with thin thickness, strong absorbing, broad bandwidth and low filler loading is of great importance for solving the problem of electromagnetic pollution. Herein, nitrogen-doped reduced graphene oxide/nickel-zinc ferrite (NRGO/Ni0.5Zn0.5Fe2O4) composite was synthesized using graphene oxide (GO) as a template by a facile two-step strategy. Results of morphology observations revealed that well-designed entanglement structure consisting of Ni0.5Zn0.5Fe2O4 microspheres and crumpled NRGO was clearly observed in the as-prepared NRGO/Ni0.5Zn0.5Fe2O4 composite. Moreover, the effects of complexing of NRGO and filler loadings on the microwave absorption properties of NRGO/Ni0.5Zn0.5Fe2O4 composite were carefully investigated. It was found that the complexing of NRGO notably enhanced the microwave absorption properties of Ni0.5Zn0.5Fe2O4 microspheres. Significantly, the obtained NRGO/Ni0.5Zn0.5Fe2O4 composite demonstrated the optimal minimum reflection loss of −63.2 dB with a matching thickness of 2.91 mm in the X-band and effective absorption bandwidth of 5.4 GHz (12.0–17.4 GHz) almost covering the whole Ku-band with a thin thickness of merely 2.0 mm. Furthermore, the relationship between filler loading and refection loss was carefully clarified. Besides, the underlying microwave absorption mechanisms of as-prepared composite were proposed. It was believed that our results could shed light on the design and fabrication of graphene-based magnetic composites as high-efficient microwave absorbers.

Synthesis and enhanced microwave absorption properties of urchin-like polyaniline/Ni0.4Zn0.4Co0.2Fe2O4 composites

A novel polyaniline/Ni0.4Zn0.4Co0.2Fe2O4 (PANI/NZCF) composite was synthesized by in situ polymerization of aniline in the presence of NZCF. The studies of structural, morphological and surface chemical bonding states were performed by X-ray diffraction, scanning electron microscopy and Fourier transform-infrared spectrometry, respectively. It was found that greater reflection loss and wider absorption bandwidths were possible by adjusting the mass ratio of NZCF to PANI on account of electromagnetic loss and impedance matching. The highest reflection loss (RL) was − 40 dB at the frequency 15.8 GHz for the PANI/NZCF composite when the effective absorption frequency at which RL < − 10 dB was in the range of 13.5–18 GHz with an absorber thickness of 1.7 mm at the mass ratio of 2:1. These effects are due to the urchin-like structure when compared to traditional encapsulation structures. Therefore, the above findings show that the PANI/NZCF composite with negligible thickness and strong absorption properties has great potential in the application of electromagnetic shielding and microwave absorbing.

Structural, magnetic and microwave absorption properties of SrFe12O19/Ni0.6Zn0.4Fe2O4 composites prepared by one-pot solution combustion method

SrFe12O19/Ni0.6Zn0.4Fe2O4 composites were synthesized by one-pot solution combustion method. The effects of NiZn ferrite content on phase, structure, microstructure and magnetic properties of composites were investigated by X-ray diffractometry, infrared spectroscopy, electron microscopy and vibrating sample magnetometry techniques. Strontium hexaferrite and NiZn ferrite phases were well crystallized following calcination at 900 °C without any impurities being formed. The composites were composed of platelet-like SrFe12O19 particles being mixed with quasi-spherical NiZn ferrite particles. The composites containing 10 wt% Ni0.6Zn0.4Fe2O4 exhibited a single magnetization curve with maximum saturation magnetization of 56 emu/g, as a confirmation of exchange coupling, while other composites had “bee waist” type hysteresis loop. The coercivity of composites decreased from 5143 to 1778 Oe with addition of NiZn ferrite phase. The microwave absorption measurements in X-band (8–12 GHz) showed a maximum absorption of −23.5 dB at 9.9 GHz for SrFe12O19-10 wt% Ni0.6Zn0.4Fe2O4 composite in comparison with the other composites.

Thermoelectric properties of CNTs/Mn0.7Zn0.3Fe2O4 composite fabricated by spark plasma sintering

As a new kind of environment-friendly material, thermoelectric material has got more and more attention and rapid development. In this work, the CNTs/Mn0.7Zn0.3Fe2O4 composite was fabricated by spark plasma sintering (SPS) technique, and the influence of SPS temperature on the thermoelectric properties was discussed. The average grain sizes increased from 50 to 400 nm with increasing SPS temperature from 600 °C to 800 °C. The electrical conductivity of CNTs/Mn0.7Zn0.3Fe2O4 composite demonstrated a typical semiconducting-like behavior, and the value can reach about 77 s m−1, which increased by 4–8 orders of magnitude in comparison with that of traditional Mn–Zn ferrites. The Seebeck coefficient was negative suggesting a n-type conduction, and its value was about −128 ∼ −213 μV K−1. By optimizing the sintering temperature, the power factor is significantly improved and the thermal conductivity is reduced simultaneously, which results in a ZT value of about 0.083. These results demonstrate that the CNTs/Mn0.7Zn0.3Fe2O4 composite is a potential thermoelectric material.

Enhanced multiferroic properties in (1–y)BiFeO3–yNi0.50Cu0.05Zn0.45Fe2O4 composites

Multiferroic composites (1–y)BiFeO3–yNi0.50Cu0.05Zn0.45Fe2O4 (y=0.0, 0.1, 0.2, 0.3 and 0.4) are synthesized by the standard solid state reaction method. The X-ray diffraction analysis affirms the formation of both the component phases and also reveals that there is no chemical reaction between them. From the energy-dispersive X-ray spectroscopy study it is observed that the percentage of the elements in the component phases is well consistent with the nominal composition of the composites. Field Emission Scanning Electron Microscopy analysis shows almost homogeneous mixture of the two phases. The real part of the initial permeability increases (up to 67%) and the loss decreases with the ferrite content in the composites which is important in application point of view. Dielectric constant (ε′), loss tangent and AC conductivity are measured as a function of frequency at room temperature. The highest ε′ is obtained for 0.6BiFeO3–0.4Ni0.50Cu0.05Zn0.45Fe2O4 composite. The dielectric dispersion at lower frequency (<105Hz) is due to the interfacial polarization. The complex impedance spectroscopy is used to correlate between the electrical properties of the studied samples with their microstructures. Two semicircular arcs corresponding to both grain and grain boundary contribution to electrical properties have been observed in all the studied samples. The maximum magnetoelectric voltage coefficient is found to be ∼38mVcm−1Oe−1 for the composite with 80% ferroelectric+20% ferrite phases. The present composite might be a promising candidate as multiferroic materials showing effective electric and magnetic properties.

Reduced graphene oxide–Ni0.5Zn0.5Fe2O4 composite: Synthesis and electromagnetic absorption properties

The reduced graphene oxide (RGO)–Ni0.5Zn0.5Fe2O4 composite was synthesized by a facile route. The morphology, microstructure and microwave electromagnetic properties of the composite were detected by means of TEM, SEM, XRD, XPS and vector network analyzer. The maximum reflection loss (RL) of the RGO–Ni0.5Zn0.5Fe2O4 reaches −47.8dB at 10.7GHz with the thickness of 2.8mm, and the absorption bandwidth with RL below −10dB is up to 11.4GHz (from 6.6 to 18.0GHz) with the thickness in the range of 2.0–4.0mm. It is believed that such composite will be applied widely in microwave absorbing area.

Magnetic properties, exchange coupling and novel stripe domains in bulk SrFe12O19/(Ni,Zn)Fe2O4 composites

Bulk SrFe12O19/(Ni0.4Zn0.6)Fe2O4 composite ferrites with mass ratios Rm = 2 : 1, 1 : 1 and 1 : 2 were prepared using nanopowders obtained via a hydrothermal method, and their phase composition, magnetic properties, exchange coupling (EC) and magnetic microstructures were systematically investigated. It is found that all the bulk specimens sintered at either 700 or 900 °C are composed of two phases but exhibit typical single-phase magnetic behaviours, indicating the existence of EC between the magnetically hard and soft phases. However, too much (Rm = 2 : 1) or too little (Rm = 1 : 2) soft (Ni0.4Zn0.6)Fe2O4 phase weakens the EC in the composites. It is also proved that except for the EC, the strengthening of chemical polarization of the internal chemical bonds affects saturation magnetization, and the size of nanoscale grains significantly influences the EC and magnetic properties. In addition, novel stripe domains are found in all of the bulk composite specimens, which could be ascribed to the magnetization of the soft (Ni,Zn)Fe2O4 phase induced by the hard SrFe12O19 phase.

MWCNTs decorated with Mn0.8Zn0.2Fe2O4 nanoparticles for removal of crystal-violet dye from aqueous solutions

In the present study, a simple, economic and environmentally friend method was utilized for the production of multi-walled carbon nanotubes (MWCNTs) decorated with Mn0.8Zn0.2Fe2O4 nanoparticles, synthesized via recycling process of Zn–C battery. The chemical composition and structure of the MWCNTs/Mn0.8Zn0.2Fe2O4 composite were confirmed by X-ray diffraction and Fourier transform infrared measurements. The morphology as well as the decoration process was characterized using transmission electron microscopy. The results showed that the MWCNTs are homogeneously decorated with cubic loosely agglomerated ferrite particles having mean crystallite size of 20 nm. An appropriate decoration mechanism was suggested and discussed. The hysteresis measurements exhibited reasonable magnetic characteristics for the obtained composite which facilitate its separation from their dispersed solution using normal magnet. Surface area measurement indicates relatively large specific surface enhances its use in adsorption process. The adsorption capacity of the entire composite was investigated using crystal violet dye. The effect of composite mass, contact time, solution pH and solution temperature on the adsorption process was investigated. The adsorption process was found to follow a pseudo-second-order model. The calculated adsorption thermodynamic parameters (ΔG, ΔH and ΔS) suggested the spontaneity of the thermodynamically favorable adsorption process.

Preparation and Magnetic Property of Carbon Nanotube/NiZnCo Ferrite Composite

Precipitation hydrothermal method was used to synthesis carbon nanotubes (CNTs) /Ni0.5Zn0.45Co0.05Fe2O4 composites, and then 1wt%CNTs/Ni0.5Zn0.45Co0.05Fe2O4 ceramics were fabricated by spark plasma sintering (SPS) technique. The phase, microstructure and magnetic properties of 1wt%CNTs/Ni0.5Zn0.45Co0.05Fe2O4 were investigated. The results show that, the substitution of zinc ions by cobalt didn’t change the spinel phase of Ni-Zn ferrite. In the SPS process, CNTs promoted the sintering kinetics, and the liquid state of Ni can act as sintering aid to accelerate the grain boundary extension. After sintered by SPS at 750 °C for 5min, the density of the bulk is about 5.2g/cm3, the grain size increased to 91nm, and the saturation magnetization of the 1wt%CNTs/Ni0.5Zn0.45Co0.05Fe2O4 composite ceramics reached at 79.7emu/g.

Microwave sintering carbon nanotube/Ni0.5Zn0.5Fe2O4 composites and their electromagnetic performance

Carbon nanotube (CNT)–Ni0.5Zn0.5Fe2O4 powders were prepared by in situ chemical precipitation and hydrothermal processing, and further sintered by microwave sintering technology. The results show that CNTs acted as ‘heating source’ and promoted the consolidation of composites during the microwave sintering process. However, too much CNTs (such as 5 wt%) led to phase decomposition and reduction of ferrite materials because of the ultra-high localized temperature building up in the interface of CNTs and ferrite grains. The electrical conductivity of composites increased by more than seven orders of magnitude when compared to that of pure Ni0.5Zn0.5Fe2O4, and remained a high value at the temperature of 70 K (for example, 1 wt% CNT/Ni0.5Zn0.5Fe2O4 sample kept conductivity of 0.1 S/m). The saturation magnetization was strongly dependent on the mass percentage of CNTs. With the increase in CNT content, both the real and the imaginary permittivity were increased in the frequency region 0.6–5 GHz (L and S bands). According to the measured results of ϵr and μr, the frequency-dependent reflectance loss (RL) of CNT/Ni0.5Zn0.5Fe2O4 composite ceramics with different CNT content was evaluated. The CNT-doped ferrite ceramics discussed herein is very promising to be used in an on-beam-line high-order mode (HOM) load in particle accelerators based on superconducting RF due to their excellent low-temperature characteristics.

Preparation of nanocrystalline-coated carbon nanotube/Ni0.5Zn0.5Fe2O4 composite with excellent electromagnetic property as microwave absorber

A combined precipitation-hydrothermal method was used to fabricate carbon nanotube/Ni0.5Zn0.5Fe2O4 ferrite composite powders. The phase, microstructure and electromagnetic properties of CNT/Ni0.5Zn0.5Fe2O4 composites were investigated. After surface modification, The zeta potential value of CNTs could maintain at about −50 mV when pH is higher than 8, which affords a suitable surface environment for in situ coating of Ni0.5Zn0.5Fe2O4 nanocrystallines. With increasing CNTs content, the saturation magnetization of the composites is gradually reduced, while the complex magnetic permeability changes little. The complex dielectric constant of the composites is significantly increased when the concentration of CNTs approaches the percolation threshold value of 2 wt%. When CNTs content is 5 wt%, the reflection ratios are less than −10 dB within the frequency range 2–9 GHz, and the reflection ratios reach a minimum −32.5 dB at a frequency of about 3.9 GHz.

Study of Permeability for Composites Including Fe, NiZn Ferrite and Fe-B-P Particles

Fe microparticle composites with different nanoparticles were prepared using Ni-Zn ferrite and Fe-B-P amorphous nanoparticles. Both additions into iron microparticles significantly increase magnetic permeability, whereas Fe-FeBP composite exhibits more advantages than Fe-(Ni <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.6</sub> Zn <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.4</sub> )Fe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> composite due to higher saturation magnetization (Ms). The magnetic field range with high permeability is about 0-600 Oe for Fe-FeBP composite, whereas it decreases to 0-80 Oe for Fe-(Ni <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.6</sub> Zn <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.4</sub> )Fe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> composite. The permeability of Fe-FeBP composite remains high up to about 1 GHz and the resonance frequency is about 2 GHz, which is higher than that of Fe-(Ni <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.6</sub> Zn <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.4</sub> )Fe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> composite.

Preparation and Characterization of an Organic/Inorganic Composite Based on Ferrospinel with Poly(Methyl Methacrylate) and Polyaniline

A novel organic/inorganic composite based on LiNi–ferrospinel with poly(methyl methacrylate) (PMMA) and polyaniline (PANI), PANI/PMMA/LiNi0.5Fe2O4 composite, was synthesized via a facile in-situ polymerization process. The structures of the resulting samples were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, and atomic force microscopy. The optical and thermal properties of the PANI/PMMA/LiNi0.5Fe2O4 composite were studied by fluorescent spectroscopy and thermogravimetry analysis. It was indicated that the existence of LiNi0.5Fe2O4 (LFNO) in the PANI/PMMA/LFNO composite resulted in changes in the fluorescence spectra. The as-obtained composite may have potential for electrical and electromagnetic applications in antistatic materials, electromagnetic shields, radar absorbers, and so forth.

Mutual doping of components in magnetoelectric particulate PbZr0.53Ti0.47O3-Mn0.4Zn0.6Fe2O4 composite

A shift of ferroelectric (T C ) and magnetic (T N ) phase transitions in the (x)PbZr 0.53 Ti 0.47 O 3 -(1-x)Mn 0.4 Zn 0.6 Fe 2 O 4 (PZT-MZF) particulate ceramic composite depending on a volume ratio of the MZF ferrite and the PZT ferroelectric, respectively, has been studied. It is established that one reason for the T C and T N shifts is a mutual doping of the ferroelectric and magnetic phases as a result of high-temperature solid-state sintering of the PZT-MZF powders.