SrBi4Ti4O15 Research Articles

Hierarchical Ordered Mesoporous Sr2Bi4Ti5O18 Microflowers with Rich Oxygen Vacancies In Situ Assembled by Nanosheets for Piezo-Photocatalysis.

The Aurivillius phase layered perovskite ferroelectric material Sr2Bi4Ti5O18 (SBTO) exhibits spontaneous polarization and piezoelectric properties, which confer significant potential for piezo-photocatalysis. Its ability to enhance electron-hole separation while providing excellent fatigue resistance positions it as a promising candidate in this field. Defects were introduced to improve the structural polarization and photoelectrochemical properties of SBTO. SBTO nanocrystals, featuring a mixed structure of hierarchically ordered mesoporous microflowers and nanosheets, were successfully synthesized via the hydrothermal method. The SBTO sample synthesized at a lower hydrothermal temperature displayed optimal oxygen vacancy concentration and exhibited superior piezoelectric-photo synergistic degradation activity for organic pollutants. Additionally, corona polarization increases the macroscopic polarization of the SBTO photocatalyst, promoting the separation of photogenerated carriers. Finite element simulations confirmed that a single flower-like SBTO structure generates a higher piezoelectric potential compared to a sheet-like morphology. In conclusion, integrating self-assembled hierarchical structure design, ferroelectric polarization, and defect engineering forms an effective strategy for achieving high-performance SBTO-based layered perovskite piezo-photocatalysts.

Enhanced Magnetic and Dielectric Properties of YFeO3 Ceramics via Formation of Solid‐Solution with Sr2Bi4Ti5O18 and ZnSnO3 Oxides

In the present investigation, magnetic and dielectric properties of solid‐solution formed between the YFeO3 with the similar crystal structure of other oxide materials are focused on. Orthorhombic crystal structure of YFeO3 (YFO), Sr2Bi4Ti5O18 (SBT), and ZnSnO3 (ZS) nanomaterials are considered to prepare the solid solutions at 1150 °C/3 h. YFO and solid solutions exhibit the orthorhombic crystal structure, which is conformed through Rietveld refinement using X‐Ray powder diffraction pattern. The decreased average grain size is observed for the solid solution (3.0 μm for YFO and ZS and 2.6 μm for YFO and SBT) when compared to YFO (3.4 μm) through scanning electron microscopy. Oxidation state of each atom/ion/element present in the YFO and solid solutions are conformed through X‐Ray photoelectron spectroscopy studies. The solid solution formed between the YFO and SBT exhibits high magnetization value (2.92 emu g−1) and high coercive filed (67.5 Oe) when compared to solid solution formed between the YFO and ZS (magnetization value = 2.48 emu g−1, and coercive filed = 46.4 Oe) and YFO (magnetization value = 1.91 emu g−1, and coercive filed = 61.8 Oe). High dielectric permittivity (εr), low dielectric loss (tan δ), and low conductivity are observed for the solid solution formed between the YFO and SBT, when compared to other materials in this study.

Effect of poling on photocatalytic activity with SrBi4Ti4O15 catalyst

AbstractThis research article is related to a bismuth oxide‐layered pseudo‐perovskite ferroelectric material and its capabilities in the area of photocatalysis. SrBi4Ti4O15 (SBT) catalyst was prepared via a solid‐state reaction followed by calcination at 950°C sustained over 4 h. X‐ray diffraction, X‐ray photoelectron spectroscopy, bandgap analysis, Raman spectroscopy, and scanning electron microscopy confirmed the successful synthesis of the SBT catalyst. The photocatalysis capability was checked on a methylene blue (MB) model dye. The poling of the SBT catalyst was performed under 2 kV/mm of electric field. The poling of the catalyst material played a crucial role in enhancing the photocatalytic activity. Moreover, the effect of volume (k(v)), initial concentration (k(ic)) of the MB dye, amount of catalyst (k(c)), and intensity (k(i)) of the light were examined and analyzed by the mathematical model. This study suggested that higher intensity and amount of catalyst enhance photocatalytic activity, whereas higher concentration and volume of dye suppress the photocatalytic activity. The amount of catalyst showed the highest effect on the photocatalytic activity. The rate constant is influenced by these factors and the order of influence is k(c) > k(i) > k(v) ≃ k(ic).

Colour tuning in Sm3+ activated and Sm3+/Eu3+ co-activated SrBi4Ti4O15 phosphors for w-LED applications

SrBi4Ti4O15 (SBT) phosphors activated by Sm3+ and co-activated by Eu3+ have been synthesized in the current research using a straightforward solid-state reaction technique. X-ray Diffraction (XRD) confirms the sample's crystallinity. Scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX), and elemental mapping have been used to analyse the morphology and elemental composition of the synthesized phosphor. Fourier-transform infrared spectroscopy (FT-IR) analysis has confirmed the vibrational characteristics of the as prepared phosphor. Photoluminescence studies show increase in luminescence intensity in case of Sm3+/Eu3+ co-activated phosphors as compared with singly doped Eu3+ and Sm3+ activated SBTO phosphors. Colour tunability was also observed from reddish-orange to pure red region when Sm3+ activated phosphors were co-activated with Eu3+ ions. These outcomes demonstrate that SrBi4Ti4O15 phosphors activated or co-activated with Sm3+ and Eu3+ can be deployed in w-LEDs and other display devices applications.

Interfacial lattice coupling engineering in all-inorganic coupled flexible films for dielectric energy storage

Hexagonal boron nitride (BN) was dispersed into the lattice of Sr2Bi4Ti5O18 (SBT) ferroelectrics to form all-inorganic flexible film capacitors. The interfacial lattice coupling in microscopic induces reconstruction of lattice and electron configuration. The electrons transfer interaction at the interfacial lattices results in the lattice stretching, thereby enhancing polyhedral dipole-dipole interactions. Meanwhile, the potential difference derived from the electron transfer provides driving force for the interfacial polarization. Above both effectively enhance the polarization without expense of breakdown strength. The interfacial lattice coupling greatly reduces the carrier generation rates under high electric field due to the ultra-high bandgap of BN, which further improves breakdown strength, thus, suppressing the inversed relationship. The recovery energy density of 119.7 J/cm3 and the efficiency of 71.2 % are obtained with a consecutive mechanical bending stability. This strategy provides an alternative to break through the inversed relationship between polarization and breakdown strength for all-inorganic flexible film capacitors.

Structural, Optical and Magnetic Properties of (1−x) YFeO3 + (x) Sr2Bi4Ti5O18 (where 0 ≤ x ≥ 0.005) Nanomaterials

Continuous efforts are being made on YFeO3 (YFO) nanomaterial to improve the magnetization value in different ways for photocatalysis and magneto-optical application point of view because of low energy bandgap (1.8–2.8 eV). In this regard, we made solid solutions with Sr2Bi4Ti5O18 (SBT) nanomaterial in an effort to increase the magnetization value of YFO nanomaterial. Here prepared the (1−x) YFO + x SBT (where x = 0, 0.00125, 0. 0025, and 0.005) nanomaterials via sol-gel route, and thus obtained individually powders were calcined at 1050 °C/3 h. The single phase of YFO without any unreacted or impurity phases were observed up to x = 0.25 mol% via X-ray diffraction studies. Calculated average crystallite size as well as dislocation density suggesting that the improvement of crystalline nature YFO sample with an increase of SBT content in YFO. The improved magnetization value (4.121 emu g−1), which is 1.3 times higher than that of YFO (3.188 emu g−1), for the x = 0.25 mol% SBT in YFO was observed, however their coercivity (39.4 Oe) is almost similar for both samples. The computed optical bandgap was found to be reduced with an increase of SBT mol% in YFO. We draw the conclusion from this analysis that SBT in YFO (x = 0.25 mol%) will make promising candidates for various magnetic applications.

Effect of ZnSnO3 on dielectric and ferroelectric properties of Sr2Bi4Ti5O18 ceramics

AbstractSr2Bi4Ti5O18 is one of the promising candidates for ferroelectric nonvolatile random access memory device applications. Albeit, this ceramic material is not suitable for certain ferroelectric device applications because of the merits and demerits associated with this material. Solid‐solution or composite ceramics in bulk configuration is the better choice to overcome the drawbacks associated with the individual compounds. Concurrently, solid‐solution of functional electro‐ceramics comprising Aurivillius family‐based lead‐free bismuth‐layered structured ceramics (1 − x) Sr2Bi4Ti5O18 (SBT) and x mol% of ilmenite structured ZnSnO3 (ZS) (where x = 0, 5, 10, and 20 mol%) were synthesized via conventional solid‐state reaction route to investigate the effect of ZS on the physical properties of SBT. X‐ray diffraction diffractograms revealed that a single phase was formed maximum up to 5 mol% of ZS in SBT and scanning electron microscopy studies suggested platelike microstructure of the samples. Intriguingly, positive‐up and negative‐down results indicated that the true switchable polarization for the 10 mol% ZS in SBT (10.87 μC/cm2), 33% higher than that of pure SBT ceramics in addition to the lower leakage current density and enhanced dielectric response in the SBT–ZS samples. The observed enhancement in electrical characteristics of SBT–ZS composite ceramics compared to pure SBT highlights the decisive role played by the ZS in lowering the thermodynamic barrier resulting in ease of polarization switching and mitigating the leakage current of SBT ceramics.

Piezoelectric charges promote FeS2 regeneration for efficient catalytical seawater splitting H2 evolution

Piezoelectric catalytic seawater hydrogen production is one of the most crucial and potential hydrogen production strategies. However, the low surface activity and the high carrier recombination rate limit the further improvement of catalytic efficiency. To solve this problem, we prepared SrBi4Ti4O15 (SBTO) and FeS2 (FS) heterojunctions, which can effectively utilize the valence state transformation cycle between Fe2+ and Fe3+ to improve the surface activity and maintain carrier separation. This mechanism of Fe2+ and Fe3+ conversion is similar to the well-known Fenton reaction. It was confirmed by electrochemical measurements that with the help of FeS2, SBTO possessed a stronger piezoelectric current response and faster carrier transfer rate. Piezoelectric catalytic seawater splitting H2 evolution rate of SBTO-25 %FeS2 could reach 31 mmol g-1h−1, which is higher than that of other piezoelectric materials in similar conditions. Our findings provide valuable insights for further improving the efficiency of seawater hydrogen production efficiency.

Selective Exposure of Robust Perovskite Layer of Aurivillius-Type Compounds for Stable Photocatalytic Overall Water Splitting.

Aurivillius-type compounds ((Bi2 O2 )2+ (An -1 Bn O3 n +1 )2- ) with alternately stacked layers of bismuth oxide (Bi2 O2 )2+ and perovskite (An -1 Bn O3 n +1 )2- are promising photocatalysts for overall water splitting due to their suitable band structures and adjustable layered characteristics. However, the self-reduction of Bi3+ at the top (Bi2 O2 )2+ layers induced by photogenerated electrons during photocatalytic processes causes inactivation of the compounds as photocatalysts. Here, using Bi3 TiNbO9 as a model photocatalyst, its surface termination is modulated by acid etching, which well suppresses the self-corrosion phenomenon. A combination of comprehensive experimental investigations together with theoretical calculations reveals the transition of the material surface from the self-reduction-sensitive (Bi2 O2 )2+ layer to the robust (BiTiNbO7 )2- perovskite layer, enabling effective electron transfer through surface trapping and effective hole transfer through surface electric field, and also efficient transfer of the electrons to the cocatalyst for greatly enhanced photocatalytic overall water splitting. Moreover, this facile modification strategy can be readily extended to other Aurivillius compounds (e.g., SrBi2 Nb2 O9 , Bi4 Ti3 O12 , and SrBi4 Ti4 O15 ) and therefore justify its usefulness in rationally tailoring surface structures of layered photocatalysts for high photocatalytic overall water-splitting activity and stability.

Structural and dielectric investigation of rare earth modified SrBi4Ti4O15 ceramics synthesized by high energy ball milling method

Lead free ferroelectric ceramics are under active research due to their nontoxic nature. Bismuth layered structure ferroelectric materials have engrossed a lot of consideration in research community due to its versatile applications and tunable electrical properties. In this research work, structural, morphological and electrical properties of rare-earth (Ho3+) modified SrBi4Ti4O15 (SBT) samples are investigated. The ceramic pellets were synthesized by solid state route using high energy ball milling. XRD studies indicated a single phase orthorhombic structure and the morphological investigation revealed formation of grain like features with marginal decrease in average grain size with Ho incorporation. Enhancement in Curie temperature is observed in the modified system. The dielectric constant for pristine SBT and SBHT sample were calculated as 1880 and 1389 at their transition temperature measured at 100 kHz frequency. An abrupt surge in loss at higher temperature can be related to enhancement in conductivity at elevated temperature. The modified sample have shown improved thermal stability making it a suitable candidate for application in high temperature sensors, transducer and actuator application.

Highly efficient photocatalytic hydrogen production by platinum modified ferroelectric SrBi4Ti4O15

Combining metal with ferroelectrics is one of the reliable strategies to enhance the photocatalytic water splitting of ferroelectrics dramatically. However, the metal loading ratio is directly related to the synergistic effect of catalysts. In order to find the appropriate loading of Pt, we fabricated SrBi4Ti4O15 (SBTO) nanosheets (NSs) and deposited different amounts of Pt nanoparticles (NPs) to form heterojunction. The optoelectronic characterizations verified that the Pt-modified SBTO NSs have broadened absorption of visible light; produce more long-lived charge carriers. The photocatalytic hydrogen production can reach 11700 μmol g−1 under continuous illumination for 3 h from the sample containing 6 wt% Pt, showing a much higher hydrogen evolution rate than other ferroelectric materials under similar reaction systems. Our work provides a valuable and feasible solution to produce hydrogen from water.

High-Performance Photocatalytic Reduction of Nitrogen to Ammonia Driven by Oxygen Vacancy and Ferroelectric Polarization Field of SrBi4 Ti4 O15 Nanosheets.

Photo-responsive semiconductors can facilitate nitrogen activation and ammonia production, but the high recombination rate of photogenerated carriers represents a significant barrier. Ferroelectric photocatalysts show great promise in overcoming this challenge. Herein, by adopting a low-temperature hydrothermal procedure with varying concentrations of glyoxal as the reducing agent, oxygen vacancies (Vo) are effectively produced on the surface of ferroelectric SrBi4 Ti4 O15 (SBTO) nanosheets, which leads to a considerable increase in photocatalytic activity toward nitrogen fixation under simulated solar light with an ammonia production rate of 53.41µmol g-1 h-1 , without the need of sacrificial agents or photosensitizers. This is ascribed to oxygen vacancies that markedly enhance the self-polarization and internal electric field of ferroelectric SBTO, and hence, facilitate the separation of photogenerated charge carriers and light trapping as well as N2 adsorption and activation, as compared to pristine SBTO. Consistent results are obtained in theoretical studies. Results from this study highlight the significance of surface oxygen vacancies in enhancing the performance of photocatalytic nitrogen fixation by ferroelectric catalysts.

Structural, microstructural, dielectric and ferroelectric properties of Ho3+ doped SrBi4Ti4O15 ceramics

The present work investigates microstructural, structural, ferroelectric and dielectric properties of Holmium, Ho3+, doped SrBi4Ti4O15 (SBT). Polycrystalline ceramics (SrBi4-xHoxTi4O15 SBHT, where x = 0, 0.02. and 0.03) were prepared by solid-state reaction method using high energy planetary ball mill. The surface morphology of all samples displayed dense microstructure and average grain size decreased with Holmium content increase. The XRD results of samples confirmed a single phase of SBT with orthorhombic crystal structure and a reduction in unit cell volume with the substitution of Holmium at B-site. The improvement in the structural and microstructural properties greatly enhanced the electric properties of SBHT. SBHT (x = 0.02) sample showed the improved ferroelectric properties (remnant polarization Pr = 1.63 μC/cm2 and Coercive field Ec = 0.51 kV/cm) making them suitable for ferroelectric applications. High Curie temperature (TC = 626 °C), elevated dielectric constant (εr = 236) and low loss (tanδ = 0.062) are obtained with the substitution of Ho (for x = 0.03) at B- site of SBT. These ceramics have high TC and improved thermal stability which makes these apt for the applications in high temperature sensors.

Concomitant structural and ferroelectric properties of Sr2Bi4Ti5O18 ceramics sintered with (K0.41Na0.53Li0.06)(Nb0.89Sb0.06Ta0.05)O3 perovskite

Lead free piezoelectric ceramics with the composition(1-x) Sr2Bi4Ti5O18+ x [(K0.41Na0.53Li0.06)(Nb0.89Sb0.06Ta0.05)O3] (where x ​= ​0, 0.05, 0.10, 0.15 and 0.20) were synthesized using the pre-reacted Sr2Bi4Ti5O18(SBT) and [(K0.41Na0.53Li0.06)(Nb0.89Sb0.06Ta0.05)O3](KNLNST) powders via solid-state reaction carried out at 1130 ​°C. Based on X-ray diffraction studies it was confirmed that only less than 0.15 ​mol of KNLST was soluble in the SBT phase. Raman spectra analyses for these samples revealed that A and B site cations from KNLNST perovskite phase were found to occupy A and B site cations of SBT. There was an increase in the grain size with the increase in x and grains with plate-like morphology were seen in these samples when observed through a scanning electron microscope (SEM). The measured values of relative permittivity (rational electric permittivity) (300 ​at 1 ​MHz), dielectric loss (0.013 ​at 1 ​MHz), and maximum polarization (5.95 ​μC/cm2) for the samples with the composition x ​= ​0.2 were found to be superior to that of undoped SBT. The decrease in Curie temperature with the increase in x for all the samples under study was confirmed through temperature-dependent dielectric measurements.

Effects of Oxide Additives on the Phase Structures and Electrical Properties of SrBi4Ti4O15 High-Temperature Piezoelectric Ceramics.

In this work, SrBi4Ti4O15 (SBT) high-temperature piezoelectric ceramics with the addition of different oxides (Gd2O3, CeO2, MnO2 and Cr2O3) were fabricated by a conventional solid-state reaction route. The effects of oxide additives on the phase structures and electrical properties of the SBT ceramics were investigated. Firstly, X-ray diffraction analysis revealed that all these oxides-modified SBT ceramics prepared presented a single SrBi4Ti4O15 phase with orthorhombic symmetry and space group of Bb21m, the change in cell parameters indicated that these oxide additives had diffused into the crystalline lattice of SBT and formed solid solutions with it. The SBT ceramics with the addition of MnO2 achieved a high relative density of up to 97%. The temperature dependence of dielectric constant showed that the addition of Gd2O3 could increase the TC of SBT. At a low frequency of 100 Hz, those dielectric loss peaks appearing around 500 °C were attributed to the space-charge relaxation as an extrinsic dielectric response. The synergetic doping of CeO2 and Cr2O3 could reduce the space-charge-induced dielectric relaxation of SBT. The piezoelectricity measurement and electro-mechanical resonance analysis found that Cr2O3 can significantly enhance both d33 and kp of SBT, and produce a higher phase-angle maximum at resonance. Such an enhanced piezoelectricity was attributed to the further increased orthorhombic distortion after Ti4+ at B-site was substituted by Cr3+. Among these compositions, Sr0.92Gd0.053Bi4Ti4O15 + 0.2 wt% Cr2O3 (SGBT-Cr) presented the best electrical properties including TC = 555 °C, tan δ = 0.4%, kp = 6.35% and d33 = 28 pC/N, as well as a good thermally-stable piezoelectricity that the value of d33 was decreased by only 3.6% after being annealed at 500 °C for 4 h. Such advantages provided this material with potential applications in the high-stability piezoelectric sensors operated below 500 °C.

Enhanced photocatalytic performance of ferroelectric-based SrBi4Ti4O15/SnS2 hybrids by piezoelectric effect

Combining the ferroelectric with semiconductor photocatalyst has been demonstrated as an effective strategy to facilitate the separation of photogenerated electrons and holes, leading to superior synergistic catalytic performance. Herein, SrBi4Ti4O15 (SBTO)/SnS2 hybrids were synthesized, where SnS2 nanostructures were decorated on the surfaces of SBTO nanosheets through a hydrothermal method. The nanostructure of SnS2 could be controlled from nanoparticles to hollow nanoflowers and eventually nanoflowers with increasing concentration of SnCl4. The light absorption capability, photocatalytic activity, and stability of SBTO/SnS2 hybrids were tremendously enhanced, ascribing to the introduction of SnS2 and built-in electric field of ferroelectric SBTO. The introduced periodic magnetic stirring on ferroelectric could resolve the electrostatic screening and help maintain the constant effectiveness of built-in field, promoting the separation of electrons and holes and further improving photocatalytic activity.

Dielectric properties of sodium and neodymium substitute to A-Site SrBi4Ti4O15 ceramics

Polycrystalline ceramics, SrBi4Ti4O15 (SBT) and Sr0.2Na0.4Nd0.4Bi4Ti4O15 (SNBT), were synthesized by solid state sintering method using planetary ball mill. The stoichiometric powders were ground for 10 hours. Single phase formation was established from the XRD results. The highest peak (119) was seen at 30°. X-ray diffraction results indicated decreased cell volume and orthorhombic distortion with the substitution of Na+ and Nd3+ in place of Sr2+. The lattice parameters were measured using Unitcell software. Grain size as well as grains random orientation was observed from scanning electron microscope results. Dielectric properties were measured using Novo control dielectric analyzer, from room temperature to 1200 °C at frequencies 1 kHz, 10 kHz, 50 kHz, 100 kHz, 500 kHz, and 1 MHz. The dielectric constant and loss decreased whereas the Curie temperature increased when Na+ and Nd3+ were substituted to A- site in SBT. This ceramic has enhanced thermal stability thus making this ceramic appropriate for sensor applications at high temperatures.

Energy storage performance in polymer dielectrics by introducing 2D SrBi4Ti4O15 nanosheets

Polymer-based dielectric energy storage materials have been playing critical roles in high-performance energy storage capacitors due to their high breakdown electric fields and facile processability. However, the low energy density and efficiency of polymer-based film capacitors limit their widespread application in various electronics products. In this contribution, we synthesized the SrBi4Ti4O15 (SBT) nanosheets with large aspect ratio by using the molten salt method and introduced them into the PVDF matrix to prepare a multilayer nanocomposite film, of which the discharge energy density and discharge efficiency were much improved. Finite element simulation results show that the addition of 2D SBT nanosheets can significantly improve the local electric field distribution of nanocomposite films. Finally, a high discharge energy density of 11.69 J cm−3 and an excellent discharge efficiency of 78.95% were simultaneously achieved in the 0/5/0 sample. This work provides a reference for polymer-based dielectrics with excellent comprehensive energy storage performance.

Effect of the thickness of Sr2Bi4Ti5O18 transition layer on the properties of BiFeO3/Sr2Bi4Ti5O18 bilayer composite thin films

BiFeO3(BFO)/Sr2Bi4Ti5O18(SBT) bilayer composite thin films were prepared using the sol-gel method. The influence of the SBT transition layer thickness on the properties of BFO/SBT bilayer composite thin films was studied. The results showed that an SBT transition layer with the proper thickness can improve the BFO/SBT bilayer composite film performance. X-ray diffraction (XRD) analysis revealed that a bismuth layered perovskite structure is formed in all of the thin films. The scanning electron microscopy (SEM) result showed that the BFO/80 nmSBT sample exhibits good crystallization, an improved density and a uniform minimum grain size compared with the other samples. The X-ray photoelectron spectroscopy (XPS) result showed that the Fe2+ content and oxygen vacancy concentration are lowest in the BFO/80 nm SBT sample. This sample has good ferroelectric properties: the leakage current density has the lowest value of J = 5.21 × 10-5 A/cm2 among the samples at 350 kV/cm, 2Ec = 900 kV/cm, and 2Pr = 151 μC/cm2. At a low electric field (E<100 kV/cm), the leakage mechanism of the thin film is ohmic conduction, and the Fowler-Nordheim (F–N) tunneling effect is observed at a high electric field (E>100 kV/cm). The relative dielectric constant (εr) is 121, the dielectric loss (tanδ) is 0.024 at 105 Hz.

Dielectric properties of Na and Pr doped SrBi4Ti4O15 ceramics

Bismuth Layer-Structured Ferroelectrics materials (BLSFs) are widely used for many applications like resonators, filters, sensors, actuators and are appropriate for non-volatile Ferroelectric Random Access Memory (FeRAM) applications. The additional advantage of BLSF materials is that in electrical applications in they work at high temperatures. In the case of resonator applications, piezoelectric components are used as inductors. Usually BLSF materials typically have higher Curie temperature than PZT materials, so instead of PZT materials, BLSFs are used for high temperature piezoelectric sensor applications. SrBi4Ti4O15 (SBT) compound is a member of Aurivillius family Bismuth layered structured Ferroelectrics. The dielectric properties of Sodium and Praseodymium doped SBT, Sr0.2Na0.4Pr0.4Bi4Ti4O15 (SNPBT), prepared by solid state double sintering method using planetary ball mill, and is studied in the present work. Single phase is confirmed from XRD and microstructure is studied from SEM. The temperature dependence of dielectric constant and dielectric loss are studied at different frequencies. The Curie temperature increased by doping SBT with Na1+and Pr3+. Thus this piezoelectric ceramic is suitable for high temperature sensor applications.