Mechanical and dielectric behaviors of perovskite (Ba,Sr)TiO3 borosilicate glass ceramics

“…The permittivity decreases with increasing the soaking time for sintering of glass ceramics. It is very interesting that the clear double phase transition was observed in barium rich glass ceramic samples [170]. The successive ferroelectric behavior in La doped BST borosilicate glass ceramics is found due to structural phase transition from the rhombohedral to orthorhombic to tetragonal to cubic.…”

Section: Lead Titanate Glass Ceramicsmentioning

confidence: 95%

Dielectric behavior of perovskite glass ceramics

Yadav

Gautam

2014

J Mater Sci: Mater Electron

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The recent developments of energy storage devices are concerned with larger energy storage ability, low loss and good temperature stability. It has a great technological importance in engineering science. The dielectric materials like ceramics and glass ceramics have great interest in electronic ceramic industry due to above concern. The ceramic dielectrics are used as a capacitive element in electronic circuits. The perovskite glass ceramics have very high dielectric constant and low dielectric loss. The high dielectric constant in glass ceramics is attributed to space charge polarization. In order to produce glass ceramics of high dielectric constant, barium titanate glass ceramics is the first discovered ferroelectric perovskite. In this review article, we are summarizing the dielectric behavior of perovskite glass ceramics such as

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“…Materials 2024, 17, x FOR PEER REVIEW 13 of 24 result is that a small amount of SiO2 cannot effectively immobilize boron oxide, resulting in excessive volatilization of boron oxide. Therefore, the addition of BGE not only affects the conversion of silica but also further causes the volatilization of boron oxide [27,28].…”

Section: Composition Analysis Of the Residual Charmentioning

confidence: 99%

The Effect of Different Diluents and Curing Agents on the Performance of Epoxy Resin-Based Intumescent Flame-Retardant Coatings

Yang,

Wan,

Yang

et al. 2024

Materials

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The epoxy resin-based (ESB) intumescent flame-retardant coatings were modified with 1,4-butanediol diglycidyl ether (14BDDE) and butyl glycidyl ether (BGE) as diluents and T403 and 4,4′-diaminodiphenylmethane (DDM) as curing agents, respectively. The effects of different diluents and curing agents on the flame-retardant and mechanical properties, as well as the composition evolution of the coatings, were investigated by using large-plate combustion, the limiting oxygen index (LOI), vertical combustion, a cone calorimeter, X-ray diffraction, FTIR analysis, a N2 adsorption and desorption test, a scanning electron microscope (SEM), a tensile strength test, and a viscosity test. The results showed that the addition of 14BBDE and T403 promoted the oxidation of B4C and the formation of boron-containing glass or ceramics, increased the residual mass of char, densified the surface char layer, and increased the specific surface area of porous residual char. When their dosage was 30%, ESB-1T-3 coating exhibited the most excellent flame-retardant properties. During the 2 h large-plate combustion test, the backside temperature was only 138.72 °C, without any melting pits. In addition, the peak heat release rate (PHRR), total heat release rate (THR), total smoke production (TSP), and peak smoke production (PSPR) were reduced by 13.15%, 13.9%, 5.48%, and 17.45%, respectively, compared to the blank ESB coating. The LOI value reached 33.4%, and the vertical combustion grade was V-0. In addition, the tensile strength of the ESB-1T-3 sample was increased by 10.94% compared to ESB. In contrast, the addition of BGE and DDM promoted the combustion of the coating, affected the ceramic process of the coating, seriously affected the formation of borosilicate glass, and exhibited poor flame retardancy. The backside temperature reached 190.93 °C after 2 h combustion. A unified rule is that as the amount of diluent and curing agent increases, the flame retardancy improves while the mechanical properties decrease. This work provides data support for the preparation and process optimization of resin-based coatings.

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Mechanical and dielectric behaviors of perovskite (Ba,Sr)TiO3 borosilicate glass ceramics

Cited by 15 publications

References 25 publications

A review of the structures of oxide glasses by Raman spectroscopy

A review of the structures of oxide glasses by Raman spectroscopy

Dielectric behavior of perovskite glass ceramics

The Effect of Different Diluents and Curing Agents on the Performance of Epoxy Resin-Based Intumescent Flame-Retardant Coatings

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