Effect of pores on dielectric breakdown strength of alumina ceramics via surface and volume effects

Zhang, Tao; Du, Jinhui; Lei, Ying; Cheng, Yanlin; Liu, Wei; Yi, Xinyu; Yin, Jie; Yu, Ping

doi:10.1016/j.jeurceramsoc.2020.03.024

Cited by 19 publications

(6 citation statements)

References 28 publications

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“…The dielectric breakdown strength refers to the highest electric field strength that a material can withstand without being destroyed under the action of an electric field, which is the key property to assess the performance of electrical and electronic devices [86][87][88] . Dielectric materials with high dielectric breakdown strength are necessary for high energy density electric energy storage applications in combination with continued miniaturization of electronic devices 89,90 .…”

Section: Applications Of Machine Learning In Perovskite Materialsmentioning

confidence: 99%

Machine learning for perovskite materials design and discovery

et al. 2021

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The development of materials is one of the driving forces to accelerate modern scientific progress and technological innovation. Machine learning (ML) technology is rapidly developed in many fields and opening blueprints for the discovery and rational design of materials. In this review, we retrospected the latest applications of ML in assisting perovskites discovery. First, the development tendency of ML in perovskite materials publications in recent years was organized and analyzed. Second, the workflow of ML in perovskites discovery was introduced. Then the applications of ML in various properties of inorganic perovskites, hybrid organic–inorganic perovskites and double perovskites were briefly reviewed. In the end, we put forward suggestions on the future development prospects of ML in the field of perovskite materials.

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Section: Applications Of Machine Learning In Perovskite Materialsmentioning

confidence: 99%

Machine learning for perovskite materials design and discovery

et al. 2021

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“…It is attributed to higher porosity in BZT (as shown in Table ). It is previously reported that, in ferroelectric ceramics, pores play a key role in the dielectric breakdown and leakage current. , The electric field is substantially enhanced when the pores interact with the side of the grains, and if the pores are perpendicular to the field, the electric field between them is increased when they are close to each other. The larger quantity of pores causes a decline in insulation and dielectric breakdown strength which leads to an increase in leakage current density. , It is well known that in ferroelectric systems, the current density increases with the increase of the electric field .…”

Section: Resultsmentioning

confidence: 99%

Relative Investigation on Microwave-Assisted Zr-Modified PbTiO₃ and BaTiO₃ Ferroelectric Ceramics for Energy Storage Application

Parhi,

Thirumalasetty,

James

et al. 2023

ACS Omega

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The escalating demand for energy-related devices has prompted an intensive study on materials for energy harvesting and storage. Recently, due to the toxicity of lead-based materials, researchers have drawn their attention to lead-free ferroelectrics. However, it is indisputable that commercially lead zirconium titanate (PZT) has gained an irreplaceable position as an actuator. In the present work, we specifically compare microwave-sintered PbZr 0.52 Ti 0.48 O 3 and BaZr 0.20 Ti 0.80 O 3 ceramics based on their energystorage capacity. The structural, optical, electrical, ferroelectric, and energy storage properties of microwave-sintered Zr-modified lead titanate (PbZr 0.52 Ti 0.48 O 3 , PZT) and Zr-modified barium titanate (BaZr 0.20 Ti 0.80 O 3 , BZT) ceramics are investigated and addressed. The temperature-dependent dielectric property analysis suggests high transition temperature and dielectric properties for PZT ceramic, whereas the near-room temperature transition is observed in the case of BZT. Furthermore, the band-gap energy value of BZT and PZT from UV−vis spectroscopy indicates the possible use of these ceramics in optoelectronic devices. The ferroelectric properties of PZT and BZT are discussed, and the maximum energy storage capacities are found to be 30.5 and 21 mJ/cm 3 for PZT and BZT, respectively. It is found that microwave-sintered PZT's characteristics make it an attractive option for use in filters, phase shifters, sensors, actuators, and energy-related devices. On the other hand, BZT finds its suitability in biomedical devices and underwater applications.

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“…The trend of roughness Ra obtained by CLSM is opposite to the trend of dielectric breakdown strength of ZTA ceramics with the increase of ZrO 2 content, and the roughness Ra is the largest at 12 wt% ZrO 2 content. This may be due to the large roughness leads to the increase of the local electric field on the surface and the increase of the surface effect, [ 15 ] which makes the dielectric breakdown strength of ZTA ceramics decrease. In addition to the effect of roughness on the dielectric breakdown strength, ZrO 2 also affects the dielectric breakdown strength of ZTA ceramics.…”

Section: Resultsmentioning

confidence: 99%

Contribution to the Understanding of the Dielectric Breakdown Mechanism of ZTA Ceramics

Zhang

2022

Adv Eng Mater

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Herein, the breakdown mechanism of alumina‐based ceramics (Al2O3–ZrO2) is studied. The specimens are characterized for their density, phase structure, micromorphology, breakdown process, and breakdown channel by micro computed tomography, high‐speed cameras, etc. The study reveals that the dielectric breakdown stability of the samples shows a decreasing trend and the dielectric loss shows an upward trend with the increase of ZrO2 content. The tetragonal phase zirconia is beneficial to enhance the dielectric breakdown strength of the sample, which is related to the martensitic transformation to prevent crack propagation. Before the ceramic breakdown, the insulating oil first breaks down, causing electric sparks. Once the ceramic breakdown occurs, the charges are rearranged, and a large amount of heat energy is generated instantly to melt the substance around the breakdown channel and erupt to the surface to form pits under the action of high internal stress.

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Effect of pores on dielectric breakdown strength of alumina ceramics via surface and volume effects

Cited by 19 publications

References 28 publications

Machine learning for perovskite materials design and discovery

Machine learning for perovskite materials design and discovery

Relative Investigation on Microwave-Assisted Zr-Modified PbTiO₃ and BaTiO₃ Ferroelectric Ceramics for Energy Storage Application

Contribution to the Understanding of the Dielectric Breakdown Mechanism of ZTA Ceramics

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Effect of pores on dielectric breakdown strength of alumina ceramics via surface and volume effects

Cited by 19 publications

References 28 publications

Machine learning for perovskite materials design and discovery

Machine learning for perovskite materials design and discovery

Relative Investigation on Microwave-Assisted Zr-Modified PbTiO3 and BaTiO3 Ferroelectric Ceramics for Energy Storage Application

Contribution to the Understanding of the Dielectric Breakdown Mechanism of ZTA Ceramics

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Relative Investigation on Microwave-Assisted Zr-Modified PbTiO₃ and BaTiO₃ Ferroelectric Ceramics for Energy Storage Application