Results 41 to 50 of about 3,350 (215)

Influence of the sintering temperature on ferroelectric properties of potassium-sodium niobate piezoelectric ceramics

open access: yesJournal of Advanced Dielectrics, 2021
The effect of sintering condition on structure, microstructure, and ferroelectric properties of (K0.44Na0.52Li0.04) (Nb0.86Ta0.10Sb0.04)- O3 (KNL–NTS) has been investigated.
J. A. Cortés   +6 more
doaj   +1 more source

Composition and temperature dependence of structure and piezoelectricity in (1−x)(K1−yNay)NbO3-x(Bi1/2Na1/2)ZrO3 lead-free ceramics [PDF]

open access: yes, 2016
Lead-free piezoceramics with the composition (1-x)(K1-yNay)NbO3-x(Bi1/2Na1/2)ZrO3 (KNyN-xBNZ) were prepared using a conventional solid state route. X ray diffraction, Raman spectroscopy and dielectric measurements as a function of temperature indicated ...
Feteira, Antonio   +7 more
core   +1 more source

Aging solitons in photorefractive dipolar glasses [PDF]

open access: yes, 2013
We study experimentally the aging of optical spatial solitons in a dipolar glass hosted by a nanodisordered sample of photorefractive potassium-sodium-tantalate-niobate (KNTN).
A. J. Agranat   +5 more
core   +1 more source

Phase stability and structural temperature dependence in sodium niobate: A high resolution powder neutron diffraction study

open access: yes, 2010
We report investigation of structural phase transitions in technologically important material sodium niobate as a function of temperature on heating over 300-1075 K.
D. Vanderbilt   +8 more
core   +1 more source

Sintering of Lead-Free Piezoelectric Sodium Potassium Niobate Ceramics

open access: yesMaterials, 2015
The potassium sodium niobate, K0.5Na0.5NbO3, solid solution (KNN) is considered as one of the most promising, environment-friendly, lead-free candidates to replace highly efficient, lead-based piezoelectrics. Since the first reports of KNN, it has been recognized that obtaining phase-pure materials with a high density and a uniform, fine-grained ...
Barbara Malič   +6 more
openaire   +2 more sources

Progress on the doping and phase boundary design of potassium–sodium niobate lead-free ceramics [PDF]

open access: yesJournal of Advanced Dielectrics, 2018
Potassium–sodium niobate (K,Na)NbO3/(KNN) lead-free ceramics have drawn vast amount of attention as one of the effective alternatives to lead-based ones. In recent years, the author’s group concentrated their work on KNN-based ceramics.
Jie Xing   +4 more
doaj   +1 more source

Suppression of Antiferroelectric State in NaNbO3 at High Pressure from In Situ Neutron Diffraction

open access: yes, 2012
We report direct experimental evidence of antiferroelectric to paraelectric phase transition under pressure in NaNbO3 using neutron diffraction at room temperature.
Chaplot, S. L.   +4 more
core   +1 more source

Frequency conversion between UV and telecom wavelengths in a lithium niobate waveguide for quantum communication with Yb+ trapped ions

open access: yes, 2016
We study and demonstrate the frequency conversion of UV radiation, resonant with 369.5 nm transition in Yb+ ions to the C-band wavelength 1580.3 nm and vice-versa using a reverse proton-exchanged waveguide in periodically poled lithium niobate.
Boes, Andreas   +6 more
core   +1 more source

Relaxor-to-ferroelectric crossover and disruption of polar order in "empty" tetragonal tungsten bronzes [PDF]

open access: yes, 2016
JG would like to thank the EPSRC for provision of a studentship via the doctoral training grant (EP/K503162/1). The research data (and/or materials) supporting this publication can be accessed at [http://dx.doi.org/10.17630/a7a9bc13-b5cb-485d-914a ...
Gardner, Jonathan   +5 more
core   +3 more sources

Polarization and acoustic properties of barium-modified lead-free potassium–sodium niobate ceramics; pp. 372–376 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2017
Results of polarization and polarization switching in samples prepared by solid phase synthesis of the (1-х)(K0.5Na0.5)(Nb0.93Sb0.07)O3–xBaTiO3 + 0.5mol%MnO2 system at x = 0.01, 0.02, and 0.04 (KNNS7–xBT) studied over a wide range of ...
Karlis Bormanis   +6 more
doaj   +1 more source

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