Complete set of ferro/piezoelectric properties of BaZrO3 and (Ba,Ca)ZrO3 doped KNLNS-based electroceramics

Carreño-Jiménez, Brenda; Reyes-Montero, Armando; López-Juárez, Rigoberto

doi:10.1016/j.ceramint.2022.03.024

Cited by 9 publications

(3 citation statements)

References 36 publications

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“…Ceramic targets of KNLNS-BCZ and KNLNS-BBNZ of 20 mm in diameter were prepared by conventional solid-state method. Detailed procedure and more information regarding the target's preparation of KNLNS-BCZ and KNLNS-BBNZ are reported elsewhere [9,10]. Thin films of KNLNS-BCZ and KNLNS-BBNZ were deposited on Pt/TiO2/SiO2/Si substrates by pulsed laser deposition (PLD) using a KrF Excimer laser (λ=248 nm).…”

Section: A Thin Films Fabricationmentioning

confidence: 99%

Lead-free KNN-based thin films obtained by pulsed laser deposition

Carreño-Jiménez

Benitez-Benitez²,

Castañeda-Guzmán³

et al. 2022

2022 IEEE International Symposium on Applications of Ferroelectrics (ISAF)

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In thiswork, 0.96(K0.48Na0.52)0.95Li0.05Nb0.94Sb0.06O3-0.04Ba0.94Ca0.06ZrO3 (KNLNS-BCZ) and 0.98(K0.48Na0.52)0.95Li0.05Nb0.95Sb0.05O3-0.02Ba0.5(Bi0.5Na0.5)0.5ZrO3 (KNLNS-BBNZ) ferroelectric thin films were obtained by pulsed laser deposition. The structural, and morphological characteristics were studied to determine the best deposition parameters and analyse the piezoelectric properties. The studied deposition parameters were temperature, laser fluence, oxygen partial pressure and frequency. These parameters impact important characteristics of the thin films like grain morphology, thickness, and roughness. KNLNS-BCZ thin films with pure perovskite structure, homogeneous grain growth, and thickness ≥100 nm were fabricated at 700 °C, 2 J/cm 2 , 300 mTorr, and frequencies of 5 Hz and 10 Hz. These films presented good ferroelectric behaviour and piezoelectric coefficient d33eff of 83.80 pm/V and 25.80 pm/V, respectively.

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Section: A Thin Films Fabricationmentioning

confidence: 99%

Lead-free KNN-based thin films obtained by pulsed laser deposition

Carreño-Jiménez

Benitez-Benitez²,

Castañeda-Guzmán³

et al. 2022

2022 IEEE International Symposium on Applications of Ferroelectrics (ISAF)

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“…The piezoelectric coefficients, d ij in the Table are material constants corresponding to the relation 3 : {S} = [d ij ]{E}, where S is the linearized strain matrix and E is the electric field strength. It is evident from the Table, that the highest performing piezoelectric materials such as PZT-5H, PZT-5K, PZN – 7%PT and PZNT8 all contain lead (Pb), which is a well-known carcinogen 4 . This renders these materials to be hazardous and entirely rules out bio-medical applications.…”

Section: Introductionmentioning

confidence: 99%

“…This renders these materials to be hazardous and entirely rules out bio-medical applications. In fact, lead-containing materials and devices are being increasingly restricted by environmental regulations such as the Waste of Electrical and Electronic Equipment (WEEE) and Restriction of Hazardous Substances (RoHS) directives 4 . It is therefore important to discover lead-free piezoelectric materials that offer high-performance and are comprised solely of environmentally benign, earth-abundant and non-toxic materials.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectricity in chalcogenide perovskites

Abir,

Sharma,

Sharma

et al. 2024

Nat Commun

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Piezoelectric materials show potential to harvest the ubiquitous, abundant, and renewable energy associated with mechanical vibrations. However, the best performing piezoelectric materials typically contain lead which is a carcinogen. Such lead-containing materials are hazardous and are being increasingly curtailed by environmental regulations. In this study, we report that the lead-free chalcogenide perovskite family of materials exhibits piezoelectricity. First-principles calculations indicate that even though these materials are centrosymmetric, they are readily polarizable when deformed. The reason for this is shown to be a loosely packed unit cell, containing a significant volume of vacant space. This allows for an extended displacement of the ions, enabling symmetry reduction, and resulting in an enhanced displacement-mediated dipole moment. Piezoresponse force microscopy performed on BaZrS3 confirmed that the material is piezoelectric. Composites of BaZrS3 particles dispersed in polycaprolactone were developed to harvest energy from human body motion for the purposes of powering electrochemical and electronic devices.

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