BZT Ceramics Research Articles

Energy storage and discharge performance for (1−x)BaSrTiO3−xBi(Zn1/2Ti1/2)O3 ceramics

AbstractAlthough lead‐free dielectric ceramics have been widely studied to obtain excellent dielectric properties and good energy storage properties, the primary challenge of low energy storage density has not yet been resolved. Here, we introduce the concept of crossover relaxor ferroelectrics, which represent a state intermediate between normal ferroelectrics and relaxor ferroelectrics, as a solution to address the issue of low energy density. The (1−x)BaSrTiO3−xBi(Zn1/2Ti1/2)O3 (x = 0,.05, .1, .15, .2) ceramics were prepared by a solid‐state method. Remarkably, 0.85BST–0.15BZT ceramics achieved a high recoverable energy density (Wrec) of 2.18 J/cm3 under an electric field of 240 kV/cm. BST–BZT materials exhibit substantial recoverable energy density, high breakdown strength, and superior energy efficiency, positioning them as a promising alternative to meet the diverse demands of high‐power applications.

Cu and Er modified barium zirconium titanate (BaZr0.05Ti0.95O3) ceramics: Composition-dependent dielectric properties

Cu2+ and Er3+ doped BaZr0.05Ti0.95O3 (BZT) ceramics were prepared using the solid-state reaction method, where amount of CuO + Er2O3 was fixed at 2 wt.% and different CuO : Er2O3 molar ratios (i.e. 1:1, 1:2, 1:3, 2:1 and 3:1) were used. The influence of Cu2+ and Er3+ doping on crystal structure and dielectric properties of the samples sintered at 1300 ?C was investigated. X-ray diffraction analysis confirmed the formation of a single-phase material and tetragonal crystal structure with P4mm symmetry. Microstructural analysis conducted with a scanning electron microscope revealed well-defined and uniformly distributed grains across the surface of the sintered samples and reduction of grain size and density with doping. The highest energy storage density of 40.51mJ/cm3 with an energy efficiency of 78.8% was obtained in the sample with CuO : Er2O3 molar ratio of 2:1. The doped BZT ceramics have high dielectric constant and significantly lower tangent loss in comparison to the undoped BZT. The dielectric data confirm the non-Debye behaviour for all the samples. Impedance spectroscopy and electrical modulus analysis indicated that conduction in the materials was influenced by both the grains and grain boundaries. The AC conductivity is described by the Jonscher?s universal power law, whereas DC conductivity follows a dependency based on the Arrhenius?s theory. The results revealed a conduction mechanism characterized by non-overlapping small Polaron tunnelling up to 340?C and a transition to correlated barrier hopping conduction above 340?C within the selected temperature range for all the samples. According to the Arrhenius fitting of DC conductivity the activation energy of the undoped BaZr0.05Ti0.95O3 sample is 0.168 eV and decrease with doping to 0.138 and 0.131 eV for the sample with lower Cu2+ contents (CuO : Er2O3 molar ratios of 1:2 and 1:3, respectively).

Tetragonal BF-xPT-0.1BZT ceramics with high Curie temperature and large piezoelectric constant

Obtaining both high Curie temperature and large piezoelectric constant simultaneously is of great significance for the application of actuators and sensors. In this research, the piezoelectric ceramics of (0.9-x)BiFeO3-xPbTiO3-0.1Ba(Zr0.5Ti0.5)O3 (BF-xPT-0.1BZT, x = 0.29, 0.30, 0.31 and 0.32) were fabricated by the traditional solid-state reaction method. BF-xPT-0.1BZT ceramics exhibit the tetragonal perovskite structure without detectable second phases, and the tetragonality c/a ratio and the tolerance factor of ceramics are about 1.03 and 0.98, respectively. SEM images reveal that ceramics are well densified with the average grain size of 5–12 μm. The Curie temperature TC of BF-xPT-0.1BZT ceramics is about 490–509 °C, slightly changing with the variation of PT content. The excellent comprehensive dielectric and piezoelectric properties are achieved for BF-0.31PT-0.1BZT ceramics with dielectric constant εr (1 kHz), tanδ, piezoelectric constant d33 and TC of 1001, 0.008, 230 pC/N and 509 °C, respectively. The significant enhancement of piezoelectric constant in the x = 0.31 sample is attributed to the enlargement of grain size. Moreover, the d33 and the planar coupling coefficient kp remain stable in the elevated temperature range of 200–400 °C, and the fluctuations are only 2% /℃ and 0.007% /℃, respectively, both of which are superior to that of BS-PT based piezoelectric ceramics. Our results indicate that BF-0.31PT-0.1BZT ceramics with high TC, large d33 and good thermal stability possess great potential for high temperature piezoelectric applications.

Substantially Enhanced Electrocaloric Effect in Ba(Zr0.2Ti0.8)O3 Lead-Free Ferroelectric Ceramics via Lattice Stress Engineering.

As an alternative to conventional vapor-compression refrigeration, cooling devices based on electrocaloric (EC) materials are environmentally friendly and highly efficient, which are promising in realizing solid-state cooling. Lead-free ferroelectric ceramics with competitive EC performance are urgently desirable for EC cooling devices. In the past few decades, constructing phase coexistence and high polarizability have been two crucial factors in optimizing the EC performance. Different from the external stress generated through heavy equipment and inner interface stress caused by complex interface structures, the internal lattice stress induced by ion substitution engineering is a relatively simple and efficient means to tune the phase structure and polarizability. In this work, we introduce low-radius Li+ into BaZr0.2Ti0.8O3 (BZT) to form a particular A-site substituted cell structure, leading to a change of the internal lattice stress. With the increase of lattice stress, the fraction of the rhombohedral phase in the rhombohedral-cubic (R-C) coexisting system and ferroelectricity are all pronouncedly enhanced for the Li2CO3-doped sample, resulting in the significant enhancement of saturated polarization (Ps) as well as EC performance [e.g., adiabatic temperature change (ΔT) and isothermal entropy change (ΔS)]. Under the same conditions (i.e., 333 K and 70 kV cm-1), the ΔT of 5.7 mol % Li2CO3-doped BZT is 1.37 K, which is larger than that of the pure BZT ceramics (0.61 K). Consequently, in cooperation with the great improvement of electric field breakdown strength (Eb) from 70 to 150 kV cm-1, 5.7 mol % Li2CO3-doped BZT achieved a large ΔT of 2.26 K at a temperature of 333 K, which is a competitive performance in the field of electrocaloric effect (ECE). This work provides a simple but effective approach to designing high-performance electrocaloric materials for next-generation refrigeration.

Optimization of sintering temperature for dielectric studies of La doped BZT ceramics

In this work, we have reported optimization of sintering temperature for dielectric studies of Lanthanum (La3+) doped BZT ceramics. The sample Ba0.99La0.01Zr0.10Ti0.90O3 has been prepared by conventional solid-state reaction route with calcination at 1000 °C and 1100 °C. Samples calcined at both the temperatures have been sintered at three different temperatures 1125 °C, 1225 °C and 1325 °C. The as-synthesized samples have been characterized by X-ray diffraction for structural studies and scanning electron microscopy to confirm the surface morphology. XRD patterns of Ba0.99La0.01Zr0.10Ti0.90O3 calcined at 1100 °C show single crystalline phase with no impurity at 1325 °C. It has been observed that sintering temperature strongly influences the crystal structure and the dielectric properties of the prepared ceramic samples. The sharp and intense peaks in the XRD pattern of sample calcinated at 1100 °C and sintered at 1325 °C represents the formation of single-phase cubic perovskite structure. This indicates the incorporation of La3+ ions into the lattice of barium zirconium titanate. High dielectric constant has been observed at low frequency. Phase structure, variation of dielectric constant, loss and a.c conductivity with frequency at room temperature of Ba0.99La0.01Zr0.10Ti0.90O3 ceramic sample have been investigated in this paper.

Design of a KNN-BZT Ceramic with High Energy Storage Properties and Transmittance under Low Electric Fields.

With the advancement of science and technology, single-function ceramics have been difficult to meet the rapid development of electronic components. It is of great significance to find and develop multifunctional ceramics with excellent performance and environmental friendliness (such as good energy storage and transparency). Especially, the realization of its excellent performance under low electric fields has more reference and practical value. In this study, by Bi(Zn0.5Ti0.5)O3 (BZT) modification in (K0.5Na0.5)NbO3 (KNN), reducing grain size, and increasing band gap energy, the purpose of improving energy storage performance and transparency has been achieved under low electric field. The results show that the submicron average grain size decreased to 0.9 μm and the band gap energy (E g) increased to 2.97 eV for 0.90KNN-0.10BZT ceramics. The transparency is up to 69.27% in the near-infrared region (1344 nm) and the energy storage density is 2.16 J/cm3 under 170 kV/cm. Moreover, the 0.90KNN-0.10BZT ceramic exhibits a power density (P D) of 17.50 MW/cm3 and the stored energy can be discharged in 1.60 μs at 140 kV/cm. This revealed a potential application of KNN-BZT ceramic as an energy storage and transparent capacitor in the electronics industry.

Electronic properties of BZT nano-ceramic grades at low frequency region

BZT ceramics was prepared by using fine powder mixture of BaCO3, TiO2 and ZrO2 in the respective molar ratio to form Ba(Zr0.10Ti0.90)O3 via solid state reaction at elevated temperature. The prepared BZT was milled in the planetary ball mill from 0-120 min to achieve different powder grades from micron to nano-sized particles. After the powder characterization by XRD and SEM the samples were pressed in disc shape and sintered at different temperatures from 1100-1350?C in the air. The sintered samples were characterized by SEM and their density and average grain size was determined and presented vs. sintering temperature and powder grades (milling time). After that the silver epoxy electrodes were deposited on sintered disc samples. The disc samples capacity and resistivity were measured at low frequency region from 1 Hz to 200 kHz using low frequency impedance analyzer. The sintering temperatures and powder grades were used as parameters. Finally the specific resistance ?, dielectric constant (?' + j?") and tg? where determined from the impedance measurements. The behavior of electronic properties where analyzed e.g. the relaxation effect of the space charge (inter-granular electric charges) vs. sintering temperature and ceramic grades. The results obtained were compared with best literature data for the losses in BZT ceramics at low frequencies.

Dielectric properties and relaxor behavior of (1-x)Ba(Zr0.15Ti0.85)O3 - xBa(Mg(1⁄3)Nb(2⁄3))O3 ceramics for capacitor applications

The Ba(Zr0.15Ti0.85)O3 (BZT) ceramics were fabricated by the conventional solid-state method and the impact of Ba(Mg(1/3) Nb(2/3))O3 (BMN) addition into the BZT matrix on their microstructure, dielectric and ferroelectric properties were examined. According to the XRD analysis, the (1-x)Ba(Zr0.15Ti0.85)O3-xBa(Mg(1⁄3)Nb(2⁄3))O3 ceramics retain a pseudo-cubic ABO3 perovskite structure with an apparent decrease in c/a ratio as x increases. The SEM images show that the BZT-BMN ceramics instigate the reduction of the average grain sizes. And as the BMN content increases to 0.01, the Mg2+ and Nb5+ ion substitutions in the B-sites greatly improved the dielectric constant of BZT ceramics at room temperature. The frequency dispersion of the dielectric constant and the diffuseness of phase transition for BZT-BMN ceramics are enhanced by increasing the BMN addition. In the modified BZT ceramics, the dielectric maximum temperature (Tm) is reduced as the BMN content increases, and the temperature stability of the permittivity is modified by BMN addition. The hysteresis loop grows thinner and the remnant polarization, as well as coercive field, is greatly reduced as the BMN addition increases.

Investigation of Electromechanical, Piezoelectric and Ferroelectric Properties of Ba(Zr0.05Ti0.95)O3 Ceramic

This paper demonstrates the structural, dielectric, ferroelectric, piezoelectric and electromechanical parameters of the pure-phase Ba(Zr0.05Ti0.95)O3 /BZT composition prepared through conventional solid state technique. The identification of compound and formation were analysed by X-ray diffraction (XRD) technique that demonstrated a pure perovskite phase of the synthesized composition. The sintering temperature- dependent density of the BZT ceramics wasstudied andthe sample with high density was considered for further study. Dense and well-defined grains were observed in the micrograph of the BZT sample studied by SEM analysis. The frequency depended dielectric study at the room temperature shows a very small variation of dielectric constant with frequency. Phase transitions related to orthorhombic symmetry to tetragonal symmetry, and, tetragonal symmetry to cubic symmetry were observed as of temperature variant dielectric study. The ferroelectric and piezoelectric strain behaviours were studied at different amplitudes and frequencies of applied field. The electromechanical parameters were obtained using the resonance and anti-resonance technique as mentioned in the IRE standard. The results obtained from the above studies point out that the BZT ceramic has the potential to be a candidate for environmentally friendly sensor and actuator device with high performance.

Ultrahigh electric breakdown strength, excellent dielectric energy storage density, and improved electrocaloric effect in Pb-free (1-x)Ba(Zr0.15Ti0.85)O3-xNaNbO3 ceramics

In this study, NaNbO3 (NN) was introduced into Ba(Zr0.15Ti0.85)O3 (BZT) to form a solid solution with relaxor ferroelectric characteristics. The dielectric breakdown strength (BDS) of the specimen with 6 mol.% NN reached 680 kV/cm, the corresponding recoverable energy storage density (Wrec) was 5.15 J/cm3, and the energy storage efficiency (η) was 77%. The dissolution of Na + ions at the A position and Nb5+ ions at the B position of the perovskite structure reduced the concentration of oxygen vacancies in the lattice and compensated for defects. The doped ceramics exhibited lower dielectric loss and better thermal stability: the Wrec value was 2 ± 1% J/cm3 at 30–120 °C. In particular, in the 0.02NN ceramics, a ΔT of 1.81 K was achieved at 130 kV/cm, and the operating temperature zone expanded with the increase in doping concentration. The introduction of NN resulted in BZT ceramics that possess excellent energy storage performance and electrocaloric effect properties.

Effect of Al2O3 nano-particles on Ba(Zr0.95Ti0.05)O3 ceramics prepared by mixed oxide method

In this study, the effect of Al2O3 nano-particles on Ba(Zr0.95Ti0.05)O3 or BZT ceramics prepared by mixed oxide method with various amount of Al2O3 were investigated. The BZT powders were calcined at 1100 °C for 3 h with heating rate of 5 °C/min. The sintering procedure of BZT + x wt.% Al2O3 nano-particles (x = 0.3, 0.7 and 1.0) was carried out at 1300 °C for 2 h with heating rate of 5 °C/min. The results showed that, all XRD patterns of BZT + x wt.% Al2O3 nano-particles ceramics could be matched with a JCPDS data file number 06-0399. The BZT + 0.7 wt.% Al2O3 nano-particles ceramic was showed the highest density about 5.9 g/cm3, Vickers micro-hardness was 8.9 GPa, dielectric constant was 2005 and dielectric loss was 0.01 at 1 kHz frequency.

Effects of scandium oxide on domain structure, dielectric and ferroelectric properties of barium zirconate titanate ceramics

The Sc2O3 doped Ba(Zr0.1Ti0.9)O3 ferroelectric ceramics were fabricated by the conventional solid state reaction method. The influences of Sc2O3 on their microstructure, especially domain structure, dielectric and ferroelectric properties were investigated by X-ray diffractometer, scanning electron microscope, LCR measurement system and ferroelectric tester. The Sc2O3 doped Ba(Zr0.1Ti0.9)O3 ceramics are tetragonal perovskites with no impurity phases. The average grain size of Ba(Zr0.1Ti0.9)O3 ceramics decreases from ~40 µm to ~5 µm as the Sc2O3 content increases. Both the 90° ferroelectric domains and the 180° ones exist in the 0.2 mol% Sc2O3 doped Ba(Zr0.1Ti0.9)O3 ceramics with an average grain size of ~26 µm. The ferroelectric -paraelectric phase transition temperature and the dielectric permittivity maximum of Ba(Zr0.1Ti0.9)O3 ceramics decrease with increasing Sc2O3 doping content, while the temperature stability of relative dielectric constant is improved effectively after Sc2O3 modification in BZT ceramics. The remnant polarization and the coercive field of BZT ceramics decrease in Sc2O3 highly doped BZT ceramics as the Sc2O3 content increases.

Microstructure, dielectric properties, relaxation behavior, and ferroelectric properties of Gd-doped lead-free BZT ceramics by sol–gel process

In this work, Gd2O3-doped BZT ceramics were prepared by the sol–gel method. Microstructure, dielectric properties, relaxation behavior, and ferroelectric properties were investigated. The grain size changed significantly with the increase of doping content. When the doping content x = 0.9, the system demonstrated excellent dielectric properties (er = 7788, tan δ = 0.021)., and the dielectric constant remained stable in the high frequency range. As the doping content increased, the relaxation behavior of the system enhanced due to the lattice distortion and the generation of oxygen vacancies. In addition, when x = 0.9, the system had excellent ferroelectricity (Pr = 8.84 μm/cm3, Ec = 2.35 kV/cm), because of the domain inversion and the movement of the domain wall. It is believed that the system with enhanced dielectric properties and piezoelectric properties may be a suitable candidate to replace the lead-based materials.

Analysis of sintering temperature effects on structural, dielectric, ferroelectric, and piezoelectric properties of BaZr0.2Ti0.8O3 ceramics prepared by sol–gel method

This article describes preparation of Barium (Zirconium) Titnate (BaZr0.2Ti0.8O3) ceramics by the sol–gel technique and its structural, dielectric, ferroelectric, and piezoelectric properties investigated with sintering temperature variation. The phase and microstructure analysis of the sintered ceramics was carried out by X-ray diffraction method (XRD) and scanning electron microscopy (SEM), respectively. XRD analysis revealed structural transformation from cubic to tetragonal phase with increase in sintering temperature. Dielectric properties have been measured with variation of frequency up to 1 MHz and with temperature up to 200 °C. The BZT ceramics exhibit diffuse phase transition with normal ferroelectric behavior. Hysteresis loop measurements disclosed that BZT ceramics have good ferroelectric nature with saturation at higher applied electric fields. Leakage current density show negative temperature coefficient resistance (NTCR) behavior. The highest value (261 pC/N) of piezoelectric coefficient (d33) has been obtained for BZT ceramic sintered at 1400 °C and revealed that ceramics have great potentials for electronic industry based on sensor technology.

Structure and enhanced dielectric temperature stability of BaTiO3-based ceramics by Ca ion B site-doping

Capacitor is an important part of many electronic devices, so the temperature stability as one key parameter of capacitor needs to be improved constantly for meeting the requirements of various application temperature. Here, combined with the X-ray diffraction (XRD), selected area electron diffraction (SAED) and Vienna Ab-initio Simulation Package (VASP) calculation, it was confirmed that Ca ion can substitute the Ti site in the BaTi1-xCaxO3-x [BTC100×] (0 ≤ x ≤ 0.05) ceramics synthesized by solid-phase method which greatly improved the low-temperature stability of dielectric constant. Moreover, introducing Bi3+ and Zn2+ into BTC4 to form (1-y)BaTi0·96Ca0·04O2.96-yBi(Zn0·5Ti0.5)O3 [(1-y)BTC4-yBZT] (0.1 ≤ y ≤ 0.2) ceramics can further improve the dielectric-temperature stability by means of diffused phase transition and core-shell structure. Most importantly, the 0.85BTC4-0.15BZT ceramics with a pseudocubic perovskite structure possessed a temperature coefficient of capacitance at 25 °C (TCC25°C) being less than ±15% over a wide temperature range of −55 °C–200 °C and a temperate dielectric constant (ε = 1060) and low dielectric loss (tanδ = 1.5%), which measure up to the higher standard in the current capacitor industry such as X9R requirements.

High-energy storage performance of (1 − x)[0.935(Bi0.5Na0.5)TiO3–0.065BaTiO3]–xBa(Zr0.3Ti0.7)O3 ceramics with wide temperature range

The (1 − x)[0.935(Bi0.5Na0.5)TiO3–0.065BaTiO3]–xBa(Zr0.3Ti0.7)O3 (BNT–BT–xBZT) ceramics with high-energy storage properties were designed and characterized. All the BNT–BT–xBZT ceramics exhibit a pure perovskite structure. The grain size of ceramics becomes larger as the BZT content increases. Enhanced energy density performances (Wrec = 1.9 J/cm3, η = 86%) are achieved for the BNT–BT–0.4BZT ceramics at 210 kV/cm. Specifically, the energy stored in the material can be rapidly released within 0.27 µs. Excellent temperature stability with the variation of Wrec less than 7% is realized in a wide temperature range from 20 to 140 °C. Moreover, the energy storage performances have good reliability after 105 electric field cycles. The high-energy storage performances indicate that the BNT–BT–0.4BZT ceramics are promising candidates in pulsed-power applications.

Effect of Zr4+ content on crystal structure, micromorphology, ferroelectric and dielectric properties of Ba(ZrxTi1−x)O3 ceramics

Ba(ZrxTi1−x)O3 ceramics (x = 0.15, 0.2, 0.25, 0.3) were prepared with solid-state reaction method. The ratio of Zr/Ti influences the crystal structure, micromorphology, ferroelectric and dielectric properties of BZT ceramics, which were characterized, respectively, by X-ray diffraction, scanning electron microscope, ferroelectric test system and dielectric test system. The X-ray diffraction patterns show that the zirconium titanate ceramic samples adopt cubic phase structure and no secondary phase. As the Zr4+ content increases, the lattice constant increases and the grain size decreases. BZT ceramic sample with 15% zirconium content has the highest dielectric constant. As the Zr4+ content increases, the dielectric constant is gradually decreased, and Curie temperature dropped from 334 to 226 K. The sample has the largest remanent polarization, when the zirconium ion content is 15%. Subsequently, the remanent polarization is reduced as the zirconium ion content increases.

EFFECT OF Gd2O3 DOPING ON DIELECTRIC PROPERTIES OF Ba(Zr0.1Ti0.9)O3 CERAMICS

Using BaCO3, TiO2, ZrO2 and Gd2O3 as the starting materials, the Ba(Zr0.1Ti0.9)O3 ceramics are prepared using solid state synthesis method, and effects of Gd2O3 dopant on microstructure and dielectric properties of Ba(Zr0.1Ti0.9)O3 ceramics are investigated. The results show that the crystal structure for Ba(Zr0.1Ti0.9)O3 ceramics is a single perovskite structure, and the doping of Gd3+ does not generate new phase. With the Gd2O3 concentration increasing, the grain size increases continuously, when the doping amount x ≥ 0.5 mol %, the grain size basically remains unchanged, the grain size is uniform. With the Gd2O3 content increasing, the dielectric constants rose first and then decreased under different sintering conditions of 1280 °C, 1300 °C, 1330 °C, and 1350 °C. When the sintering temperature is 1350 °C and the Gd3+ doping amount is x = 0.5 mol %, the dielectric loss is minimal, the dielectric constant is the highest, and the dielectric performance at room temperature is optimal. Gd2O3 doping has little effect on the movement of the Curie point of BZT ceramics, but the doping of Gd2O3 can increase the peak of the dielectric peak at the Curie point.

A novel lead-free NaNbO3–Bi(Zn0.5Ti0.5)O3 ceramics system for energy storage application with excellent stability

Many researches have been referred to the AFE structure of NaNbO3 in order to develop high power energy storage for NaNbO3-based ceramic. However, the square P-E loops with large Pr was observed in NaNbO3 ceramics due to the coexistence of AFE and the field-induced metastable FE, which suppress the energy storage property of NaNbO3-based ceramics. In the present work, lead-free (1-x)NaNbO3-xBi(Zn0.5Ti0.5)O3 (abbreviated as (1-x)NN-xBZT) dielectric ceramics were prepared via the traditional solid-state route. The structures, relaxor behavior and energy storage property of (1-x)NN-xBZT ceramics were investigated with the introduction of BZT. The slim P-E loops were obtained while x = 0.09–0.12 and the maximum discharge energy storage density (Wrec = 2.1 J/cm3) was obtained while x = 0.09, meanwhile a high energy storage efficiency (η = 76%) was achieved. Moreover, the charge-discharge tests show that 0.91NN-0.09BZT ceramics can achieve fast discharge rate (50 ns) and exhibit excellent stabilities of temperature and electric field, which guarantee the application prospect of 0.91NN-0.09BZT ceramics for lead-free plus power system in a wide temperature range.

Effect of Zr4+ Content on Crystal Structure, Micromorphology and Dielectric Properties of Ba(Zrx Ti1-X)O3 Ceramics

Ba(Zrx Ti1-x)O3 ceramics (X=1.5, 2.0, 2.5, 3.0) were prepared by solid-state reaction method. Effect of controlling the ratio of Zr/Ti on the crystal structure, micromorphology and dielectric properties of BZT ceramics. Their crystal structures, morphologies, and electric properties were respectively characterized using X-ray diffraction, scanning electron microscope and impedance analyzer. The X-ray diffraction patterns show that the zirconium titanate ceramic samples behave cubic phase structure and no secondary phase. The ratio of Zr/Ti has a great influence on the crystal structure, microstructure and dielectric properties. As the Zr4+ content increases, the lattice constant increases and the grain size decreases. The dielectric constant is the largest when the Zr content is 15%. As the Zr4+ content increases, the dielectric constant decreases gradually, and the Curie temperature moves toward the low temperature region.