Effect of oxygen sintering on the structural and electrical properties of KNN ceramics

Palei, P.; Pattanaik, M.S.; Kumar, Pawan

doi:10.1016/j.ceramint.2011.05.162

Cited by 13 publications

(8 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As an increasing concern of the toxicity of lead in traditional Pb(Zr,Ti)O 3 -based piezoceramics, lead-free piezoceramics have drawn much attention recently [1][2][3]. Among various kinds of lead-free piezoceramics systems, (K,Na)NbO 3 (KNN)-based ceramics show relatively high Curie point as well as attractive piezoelectric activity comparable to PZTbased ceramics; therefore, they are considered as one of the most promising lead-free candidates for the substitution of PZT-based ceramics [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The phase structure and electric properties of low-temperature sintered (K, Na)NbO3-based piezoceramics modified by CuO

Zhou

Cheng

Wang

et al. 2014

Ceramics International

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

The phase structure and electric properties of low-temperature sintered (K, Na)NbO3-based piezoceramics modified by CuO

Zhou

Cheng

Wang

et al. 2014

Ceramics International

View full text Add to dashboard Cite

“…28 Zhao et al have reported direct bandgap with 3.09 eV. 29 whereas indirect bandgap was considered for KNN by Zhou et al 30 Therefore, it is better to use a different way to calculate the bandgap which does not depend on the value of m. Considering the Tauc formula, one can write:…”

mentioning

confidence: 99%

Structural and optical properties of KNN nanocubes synthesized by a green route using gelatin

Khorrami

Kompany

Zak

2015

Funct. Mater. Lett.

View full text Add to dashboard Cite

Sodium potassium niobate nanoparticles [( K 0.5 Na 0.5) NbO 3, KNN ], KNN-NPs, were synthesized using a modified sol–gel method. Structural and optical properties of the prepared samples were investigated by thermogravometric analyzer (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM), Raman and UV–Vis spectroscopy. The XRD patterns showed that the formation of the orthorhombic KNN-NPs starts at 500°C calcination temperature. Raman spectroscopy was used to investigate the crystalline symmetry and the structural deformation of the prepared KNN-NPs. TEM images showed that the morphology of the prepared particles is cubic, with the average size of about 50 nm. From diffused reflectance spectroscopy along with using Kubelka–Munk method, the energy bandgaps were determined to be indirect with the values of 3.13 eV and 3.19 eV for the samples calcined at 500°C and 600°C, respectively.

show abstract

“…Table 3 summarizes the mentioned and some other relevant works [136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154] published on this solid solution series. Addition of nanoparticles (ZnO, CuO and SnO 2 ) as sintering aids in Li-doped KNN materials have also been investigated but the piezoelectric coefficient d 33 is decreased [137].…”

Section: (K05na05)nbo3 (Knn)mentioning

confidence: 99%

Towards Lead-Free Piezoceramics: Facing a Synthesis Challenge

Villafuerte‐Castrejon

Morán

Reyes-Montero

et al. 2016

Materials

View full text Add to dashboard Cite

The search for electroceramic materials with enhanced ferro-pyro-piezoelectric properties and revealing the perovskite type structure has been the objective of a significant number of manuscripts reported in the literature. This has been usually carried out by proposing the synthesis and processing of new compounds and solid solution series. In this work, several methods to obtain ferro-pyro-piezoelectric families of materials featuring the well-known ABO3 perovskite structure (or related) such as BaTiO3, Ba1–xCaxTi1–yZryO3, (Bi0.5Na0.5)TiO3, (K0.5Na0.5)NbO3 and their solid solutions with different cations either in the A or B positions, are presented. For this kind of materials, the challenge for obtaining a single phase compound with a specific grain size and morphology and, most importantly, with the adequate stoichiometry, will also be discussed. The results reviewed herein will be discussed in terms of the tendency of working with softer conditions, i.e., lower temperature and shorter reaction times, also referred to as soft-chemistry.

show abstract

Effect of oxygen sintering on the structural and electrical properties of KNN ceramics

Cited by 13 publications

References 23 publications

The phase structure and electric properties of low-temperature sintered (K, Na)NbO3-based piezoceramics modified by CuO

The phase structure and electric properties of low-temperature sintered (K, Na)NbO3-based piezoceramics modified by CuO

Structural and optical properties of KNN nanocubes synthesized by a green route using gelatin

Towards Lead-Free Piezoceramics: Facing a Synthesis Challenge

Contact Info

Product

Resources

About