Results 11 to 20 of about 126,316 (253)

Sodium Potassium Niobate-Based Piezoelectrics Sintered in Humid Air

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2023
While the consequences of humidity during solid-state processing of sodium potassium niobate-based lead-free piezoelectric powders are well established, the effect of humidity at later fabrication steps is less known.
Gianni Ferrero, M. Pierchała, Konstantin Astafiev, E. Ringgaard, B. Sudireddy, A. B. Haugen   +5 more
semanticscholar   +4 more sources

Atmosphere-Assisted FLASH Sintering of Nanometric Potassium Sodium Niobate

Nanomaterials, 2022
The request for extremely low-temperature and short-time sintering techniques has guided the development of alternative ceramic processing. Atmosphere-assisted FLASH sintering (AAFS) combines the direct use of electric power to packed powders with the ...
Ricardo Serrazina, Luis Pereira, Paula M. Vilarinho, Ana M. Senos   +3 more
doaj   +3 more sources

Synthesis of potassium–sodium niobate (KNN) from NbO2

Open Ceramics, 2021
KxNa1-xNbO3 (0 
Cerem Piskin, Levent Karacasulu, Mauro Bortolotti, Cekdar Vakifahmetoglu   +3 more
doaj   +3 more sources

DIELECTRIC PROPERTIES OF SODIUM POTASSIUM NIOBATE TITANATE CERAMICS

Transactions of the Kоla Science Centre of RAS. Series: Engineering Sciences, 2023
The paper considers the preparation of potassium sodium niobate ceramics doped with titanium in an amount of 5 mol. %. The structure and dielectric properties were investigated in the temperature range 30–650 °C. It is shown that acceptor doping leads to
E. Barabanova, Sergej E. Kondratev, A. Ivanova   +2 more
semanticscholar   +2 more sources

Fast-firing of potassium sodium niobate (KNN)

Open Ceramics
Potassium sodium niobate (KNN) is one of the most promising Pb-free piezo-ceramics. In the present work, KNN was produced by fast-firing with different cooling strategies, i.e., fast and slow cooling.
Levent Karacasulu, Merve Karakaya, Umut Adem, Vincenzo M. Sglavo, Mattia Biesuz, Cekdar Vakifahmetoglu   +5 more
doaj   +3 more sources

Acceptor and Donor Dopants in Potassium Sodium Niobate Based Ceramics [PDF]

Frontiers in Materials, 2020
B-site doping in potassium sodium niobate (KNN) with Mn2+ (M⁢nNb″′) and Ti4+ (T⁢iNb′) dopants were soluble but prevented KNN from achieving a high relative density, while Sn4+ (S⁢nNb′) was not soluble in the structure as evidenced by second phase peaks ...
Fayaz Hussain, Fayaz Hussain, Amir Khesro, Zhilun Lu, Zhilun Lu, Nouf Alotaibi, Ahmad Azmin Mohamad, Ge Wang, Dawei Wang, Di Zhou   +9 more
doaj   +4 more sources

Porous ceramics of sodium potassium niobate system

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов
In our work, we used the finely dispersed polystyrene to produce porous samples of the piezoelectric ceramics. Samples of the sodium potassium niobate ceramics with pore concentrations of the 10, 20, 25, 30 and 40 volume percent were produced.
D.V. Mamaev, O.V. Malyshkina, A.I. Ivanova   +2 more
doaj   +2 more sources

Sodium–potassium–niobate based piezoelectric ceramics: processing—microstructure—properties

Japanese Journal of Applied Physics
Sodium potassium niobate (KNN) and KNN-based ceramics are considered viable alternatives to lead-based piezoelectric ceramics. Their chemical composition is the key to their phase transitional behaviour, which determines their functional properties.
Barbara Malič
semanticscholar   +2 more sources

Sintering of Lead-Free Piezoelectric Sodium Potassium Niobate Ceramics. [PDF]

Materials (Basel), 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 ...
Malič B, Koruza J, Hreščak J, Bernard J, Wang K, Fisher JG, Benčan A.   +6 more
europepmc   +3 more sources

Structure and dielectric properties of Ti-doped KNN ceramics

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2023
The work is devoted to investigation of the influence of the technology for producing potassium sodium niobate ceramics with an acceptor impurity Ti4+ on its structure and dielectric properties.
E.V. Barabanova, S.E. Kondratev, A.I. Ivanova   +2 more
doaj   +1 more source