Piezoelectric properties of Li–Ta co-doped potassium–sodium niobate ceramics prepared by spark plasma and conventional sintering

López-Juárez, Rigoberto; González, Federico; Zárate‐Medina, J.; Escalona-González, Ricardo; Torre, S.D. De la; Villafuerte‐Castrejon, M. E.

doi:10.1016/j.jallcom.2010.12.103

Cited by 24 publications

(14 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Fig. 3 the SEM images of KNLNT sintered samples by CS and SPS are shown (López-Juárez et al, 2011b), it is clearly observed the difference in densification (porosity). The difference in densification level affects directly the piezoelectric and dielectric properties.…”

Section: Spark Plasma Sinteringmentioning

confidence: 91%

See 1 more Smart Citation

Lead-Free Ferroelectric Ceramics with Perovskite Structure

López-Juárez¹,

González²,

Villafuerte-Castrejón³

2011

Ferroelectrics - Material Aspects

View full text Add to dashboard Cite

Section: Spark Plasma Sinteringmentioning

confidence: 91%

“…Then, the synthesis of KNN based ceramics has been reviewed in previous sections, emphasizing the chemical methods used until now. In this work a new approach is described as is reported elsewhere (López et al, 2010(López et al, , 2011b. The spray drying method was employed to synthesize chemically homogeneous powders.…”

Section: Spark Plasma Sinteringmentioning

confidence: 99%

Lead-Free Ferroelectric Ceramics with Perovskite Structure

López-Juárez¹,

González²,

Villafuerte-Castrejón³

2011

Ferroelectrics - Material Aspects

View full text Add to dashboard Cite

“…Interestingly enough, this kind of KNN material (modified or not) has been prepared by the “spray-drying” method, as an alternative to the ceramic method, yielding nano-sized powders which can be sintered to prepare ceramics of high density (96%) with improved properties [131,132]. With the same strategy, trying to avoid potassium or sodium losses by sublimation, these ceramics have been prepared by “fast chemistry” methods, such as spark-plasma synthesis (SPS) and microwave-assisted methods [133,134]. Nevertheless, regarding the control of grain growth, it is worth noting that self-orientation and agglomeration of nanoparticles can usually be observed besides microstructures consisting of domains and domain walls (Figure 8) [135], all these issues affecting the piezoelectric properties [136].…”

Section: (K05na05)nbo3 (Knn)mentioning

confidence: 99%

Towards Lead-Free Piezoceramics: Facing a Synthesis Challenge

Villafuerte‐Castrejon

et al. 2016

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

“…These chemical elements usually enter in B position of the ABO 3 perovskite structure and thus produce A-site vacancies that suppress the formation of the hygroscopic secondary products [8]. Some studies have also been carried out concerning the formation of solid solutions, such as KNN-SrTiO 3 [9], KNN-LiNbO 3 [10], KNN-LiTaO 3 [11][12][13], KNN-LiSbO 3 [14] and KNN-LiSbO 3 -LiTaO 3 [15,16]. The effects of such MnO substitution on the phase composition, microstructure, dielectric and piezoelectric properties of [(K 0.44 Na 0.52 Li 0.04 ) 1−x Mn x/2 ](Nb 0.86 Ta 0.10 Sb 0.04 )O 3 ceramics were investigated.…”

Section: Introductionmentioning

confidence: 99%