Influence of microwave sintering on electrical properties of BCTZ lead free piezoelectric ceramics

Orlik, Kelly; Lorgouilloux, Yannick; Marchet, Pascal; Thuault, Anthony; Jean, Florian; Rguiti, Mohamed; Courtois, Christian

doi:10.1016/j.jeurceramsoc.2019.12.010

Cited by 33 publications

(17 citation statements)

References 21 publications

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“…Of course, the high density of MWS ceramics also contributes positively to this. The dielectric loss (tan δ ) of two sets of samples is very close, and remains around 0.02~0.04, as shown in Figure 6 e. This suggests that the tan δ is not sensitive to the sintering methods, and this phenomenon has been reported in other BT-based ceramics [ 29 ]. The d 33 of MWS and CS ceramics presents a similar change trend, as shown in Figure 6 f. That is, d 33 first increases and then decreases with the increase of BF content, reaching the maximum values (MWS: ~425 pC/N, CS: ~360 pC/N) at x = 0.004.…”

Section: Resultssupporting

confidence: 65%

Structure and Electrical Properties of Microwave Sintered BTS-BCT-xBF Lead-Free Piezoelectric Ceramics

Wang

et al. 2022

Materials

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Barium titanate (BT)-based ceramics are one of the promising piezoelectric materials for environment-friendly electro-mechanical transformation. However, high performance materials are often sintered at high temperatures, resulting in volatile components and increased energy consumption. Here, 0.82Ba(Ti0.89Sn0.11)O3-(0.18-x)(Ba0.7Ca0.3)TiO3-xBiFeO3 (BTS-BCT-xBF) piezoelectric ceramics were prepared by microwave sintering (MWS) method, and the structure and properties were emphatically studied, aiming to reveal the regulatory mechanism of MWS on the structure and properties. Compared with conventional solid sintering (CS), the phase structure presents a similar evolution in MWS ceramics as a function of BF, while the more refined grain size and the denser structure are observed in MWS ceramics. The electrical properties (e.g., d33, εr, tan δ, etc.) of MWS ceramics are superior to the CS ceramics owing to the refined grain size and denser microstructure. It is worth noting that the energy storage performance (e.g., energy storage density, energy storage efficiency) significantly outperformed expectations due to the slender hysteresis loop resulting from the smaller grain and high cubic phase. Therefore, the MWS sintering mechanism can further drive practical application of BT-based ceramics.

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Section: Resultssupporting

confidence: 65%

Structure and Electrical Properties of Microwave Sintered BTS-BCT-xBF Lead-Free Piezoelectric Ceramics

Wang

et al. 2022

Materials

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“…The study carried out by Orlik et al, demonstrated that barium calcium zirconate titanate, (Ba,Ca)(Zr,Ti)O 3 , BCZT, a piezoelectric lead-free ceramics can be prepared by microwave sintering with the treatment duration reduced from 12.5 hours to 1.5 hours. The obtained samples had a finer microstructure and better mechanical properties compared to the ones obtained by conventional sintering methods [13].…”

Section: Application Of Microwave Sintering In the Fabrication Of Different Engineering Materialsmentioning

confidence: 81%

A Review of Microwave-Assisted Sintering Technique

Ćurković

Veseli

Gabelica

et al. 2021

TFAMENA

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The present study examines the potential of microwave heating as an emerging and innovative energy-efficient alternative to conventional heating techniques used for different materials, with a focus on the processing of ceramic materials. Modern ceramics are studied extensively, and their use and different applications are wide due to many advantages of these materials. The most important factor in microwave sintering which differentiates it from conventional heating techniques is a unique heat transfer mechanism. Microwave energy is absorbed by the material, hence the transfer of energy takes place at the molecular level. This way, the heat is generated throughout the material, i.e. on the inside as well on the outside. This allows a very low temperature gradient throughout the material cross section. When conventional sintering is used, typically at high heating rates, high temperature gradients pose a problem. The accelerated microwave heating occurs through the whole volume, so the heating is uniform, which limits the grain growth and coarsening, and leads to a uniform and fine microstructure. The densification is accelerated as well during the unique heat transfer mechanism of microwave sintering, which enhances the mechanical properties of the sintered materials.This paper discusses the use of microwave sintering in the manufacturing of different modern technical materials, namely ceramics, composites, metals and alloys, and glasses. The improvement of different properties is described using the available literature.

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“…14,[28][29][30] In this study, we use the term RPLS, which emphasizes that there is no external pressure applied during the sintering process. The RPLS utilizes fast heating and cooling rates in the order of magnitude of hundreds • C/min, which can be comparable to those used in SPS 14 and MWS 15 but does not suffer from the mentioned disadvantages. As reported previously, infrared radiation is dominant over convection and conduction during rapid heating, 28 leading to accelerated microstructure evolution, both in terms of densification and grain growth.…”

Section: Introductionmentioning

confidence: 99%

Rapid pressureless sintering of barium titanate–based piezoceramics and their electromechanical harvesting performance

et al. 2022

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The innovative method of processing of Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT), Ba0.95Ca0.05Ti0.91Sn0.09O3 (BCST), and BCZT doped with 0.07‐wt.% CeO2 (Ce‐BCZT) lead‐free piezoceramics is presented. The rapid pressureless sintering (RPLS) technique can reduce high‐temperature processing time more than eight times compared to the conventional sintering. RPLS was performed at a heating and cooling rate of 100°C/min up to 1550°C with 15‐, 30‐, 45‐, and 60‐min dwell times, producing defect and crack‐free nearly dense ceramics. The optimal microstructure exhibiting the highest piezoelectric constant was reached after 30 min in BCZT (grain size 25–30 μm, d33 = 428 pC/N), 45 min in Ce‐BCZT (grain size 30–35 μm, d33 = 515 pC/N), and 45 min of dwell time in BCST (grain size 58–68 μm, d33 = 443 pC/N). The highly competitive energy‐harvesting properties were discovered for BCZT, resp. Ce‐BCZT (ƞ = 94.5, resp. 93.4%, FOMoff = 6.1, resp. 7.8 × 10−10 m2/N) ceramics.

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Influence of microwave sintering on electrical properties of BCTZ lead free piezoelectric ceramics

Cited by 33 publications

References 21 publications

Structure and Electrical Properties of Microwave Sintered BTS-BCT-xBF Lead-Free Piezoelectric Ceramics

Structure and Electrical Properties of Microwave Sintered BTS-BCT-xBF Lead-Free Piezoelectric Ceramics

A Review of Microwave-Assisted Sintering Technique

Rapid pressureless sintering of barium titanate–based piezoceramics and their electromechanical harvesting performance

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