C++

Sengupta, Saumyendra; Korobkin, Carl Phillip

doi:10.1007/978-1-4612-2636-9

Cited by 12 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Anhydrous metal oxalates [46] constitute an important group of materials having significant applications in nanomaterials technology [47][48][49][50][51][52] because their controlled thermal decomposition process [53][54][55][56][57][58][59] lead to metallic or metal oxide products in the form of nanoparticles from which nanopowders possessing technologically desirable properties may be obtained. In particular, silver oxalate is a highly demanded material due to its use as a precursor for the production of silver nanoparticles which are incorporated in coatings, nanofibers, thin films, pigments, first aid bandages plastics, soaps, skin care products, and textiles.…”

mentioning

confidence: 99%

Silver Oxalate: Mechanical Properties and Extreme Negative Mechanical Phenomena

Colmenero

2019

Advcd Theory and Sims

View full text Add to dashboard Cite

The crystal structure and mechanical properties of silver oxalate, Ag 2 C 2 O 4 , are determined using first-principles solid-state methods. The set of calculated mechanical properties include the bulk modulus and its pressure derivatives, the Young and shear moduli, the Poisson's Ratio and the ductility, hardness, and anisotropy indices. Silver oxalate is a highly anisotropic brittle material possessing a small bulk modulus of 9.6 GPa. It displays the negative Poisson's ratio (NPR) phenomenon, the value of the lowest NPR having a very large magnitude, −1.27. Besides, it exhibits the most extreme form of the negative linear compressibility (NLC) phenomenon found to date. Silver oxalate displays anisotropic NLC for external pressures in the range −0.1 to −2.4 GPa directed along the [010] crystallographic direction and isotropic NLC for isotropic pressures in the range −0.51 to 13.4 GPa. The lowest value of the negative compressibility, −831.9 ± 10 TPa −1 , is found for an isotropic pressure of −0.16 GPa. The absolute value of the computed lowest NLC is extremely large, about three times larger than the absolute value of the lowest NLC found so far. The NLC pressure range is also very wide, its width being more than two times the largest range found to date.

show abstract

mentioning

confidence: 99%

Silver Oxalate: Mechanical Properties and Extreme Negative Mechanical Phenomena

Colmenero

2019

Advcd Theory and Sims

View full text Add to dashboard Cite

show abstract

“…. [1]. [ The required performances in the GHz frequency range for integration in telecommunication electronic devices are: (i) a moderate permittivity (100-1000), (ii) low insertion losses (≤1%), (iii) a good thermal stability and (iv) a high tunability of the dielectric permittivity (>10%).…”

Section: Introductionmentioning

confidence: 99%

Design of New Tunable Ferroelectric Composites

Huber¹,

Tréguer‐Delapierre²,

Elissalde³

et al. 2003

Ferroelectrics

View full text Add to dashboard Cite

Non-linear dielectrics which display electric-field dependent dielectric properties can be used in microwave devices such as tunable resonators or phase shifters. The required performances are essentially moderate permitivity (100-1000), low dielectric losses (≤1%) in the GHz frequency range, good thermal stability and high tunability of the dielectric susceptibility (>10%). The mixed perovskite Ba 0.6 Sr 0.4 TiO 3 [BST] is an attractive candidate as its ferroelectric transition occurs close to room temperature and it displays high tunability but also strong temperature sensitivity and high frequency dielectric losses. To overcome these two deficiencies, ceramic/ceramic composites based on BST and a non-ferroelectric oxide such as MgO, MgTiO 3 , SnO 2 and SiO 2 were synthesized and compared to BST. For a better control of the losses a new concept based on a core-shell principle is presented. Through soft chemistry routes, a core made of BST grains is coated by a simple binary oxide shell. Modulation of the dielectric properties is expected by changing the core-shell structure. High frequency experiments are underway in order to check the GHz losses of these composites.

show abstract

“…10 This was done to overcome the limitations found using the solid-state route to synthesize composites. [11][12][13][14] Indeed, in such a case, the properties improvement is limited due to interdiffusion evidenced between the two phases. With use of the core-shell concept, the efficiency of the coating was checked.…”

Section: Introductionmentioning

confidence: 99%

“…In our pioneering work, we apply the core−shell concept to ferroelectric nanoparticles in which the BST core was surrounded by a silica shell, as low loss dielectric oxide . This was done to overcome the limitations found using the solid-state route to synthesize composites. − Indeed, in such a case, the properties improvement is limited due to interdiffusion evidenced between the two phases. With use of the core−shell concept, the efficiency of the coating was checked.…”

Section: Introductionmentioning

confidence: 99%

Controlled Growth of Silica Shell on Ba_0.6Sr_0.4TiO₃ Nanoparticles Used As Precursors of Ferroelectric Composites

et al. 2005

View full text Add to dashboard Cite

A method based on a seeded growth process was developed to coat ferroelectric nanoparticles with a dielectric silica shell. This method, applied to size-polydispersed (Ba0.6Sr0.4)TiO3 particles (BST, mean diameter 150 nm), allows the control of the silica shell thickness from 2 to 80 nm with an accuracy of 1−2 nm. The morphology and surface physical chemistry of the core−shell were studied by transmission electron microscopy, photon correlation spectroscopy, and zeta potential measurements. A size-sorting procedure consisting of several cycles of centrifugation was optimized to extract the BST@silica nanoparticles of the required size for dielectric properties tuning. Upon sintering, dielectric measurements showed that the ferroelectric transition was maintained in the dense nanocomposites.

show abstract

C++

Cited by 12 publications

References 0 publications

Silver Oxalate: Mechanical Properties and Extreme Negative Mechanical Phenomena

Silver Oxalate: Mechanical Properties and Extreme Negative Mechanical Phenomena

Design of New Tunable Ferroelectric Composites

Controlled Growth of Silica Shell on Ba_0.6Sr_0.4TiO₃ Nanoparticles Used As Precursors of Ferroelectric Composites

Contact Info

Product

Resources

About

C++

Cited by 12 publications

References 0 publications

Silver Oxalate: Mechanical Properties and Extreme Negative Mechanical Phenomena

Silver Oxalate: Mechanical Properties and Extreme Negative Mechanical Phenomena

Design of New Tunable Ferroelectric Composites

Controlled Growth of Silica Shell on Ba0.6Sr0.4TiO3 Nanoparticles Used As Precursors of Ferroelectric Composites

Contact Info

Product

Resources

About

Controlled Growth of Silica Shell on Ba_0.6Sr_0.4TiO₃ Nanoparticles Used As Precursors of Ferroelectric Composites