Effect of excess TiO2 on the phase evolution and densification of sol-gel derived (Ba,Sr)TiO3 powders

Huang, Haitao; Qiu, Wei; Tan, Ooi Kiang; Zhu, Weiguang; Zhou, Li

doi:10.1007/s10832-006-9875-3

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…Moreover, this step could be also due to the further combustion of organics, such as (Ba,Sr) 2 Ti 2 O 5 CO 3 . [24] The endothermic peaks in the DTA curves at 307-389 °C corresponded to the decomposition of acetate compounds that exist in the samples and the vaporization of residual organic compounds. The third stage with a weight loss of 3% (557-783 °C), and 5% (550-763 °C) for BaTiO 3 and BSr5%T respectively, are attributed to the formation of the carbonate phases (intermediate phases).…”

Section: Thermal Analysis (Dta/tga)mentioning

confidence: 99%

Synthesis of Ba₁₋_xSr_xTiO₃ (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Tihtih

Ibrahim

Kurovics

et al. 2021

Crystal Research and Technology

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Strontium‐modified barium titanate ceramics with the compositional formula Ba1−xSrxTiO3 (barium strontium titanate, BSrxT) with (x = 0, 0.05, 0.125, 0.15, 0.20, and 0.3) have been synthesized through sol‐gel method. X‐ray diffraction (XRD) patterns of the as‐prepared ceramics, calcined at a relatively low temperature (950 °C/3 h), reveal that BSrxT ceramics possess tetragonal structure in the range of x = 0–20% and shift into a cubic structure at high Sr composition (x = 30%). Based on XRD and Fourier‐transform infrared spectroscopy analysis, the occupation of the Ba and/or Ti sites by strontium in the BaTiO3 system and the behaviors of the crystalline parameters as functions of the Sr content have been discussed. The scanning electron microscopy shows that the grain size and densification sensitively depend on the Sr content. The study of the thermal conductivity measurements performed on the as‐prepared ceramics reveals the influence of Sr content on the thermal conductivity value. However, the microstructure of BSrxT impacts the compressive strength, therefore, the value of the latter is found to be decreased when the grain size increased.

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Section: Thermal Analysis (Dta/tga)mentioning

confidence: 99%

Synthesis of Ba₁₋_xSr_xTiO₃ (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Tihtih

Ibrahim

Kurovics

et al. 2021

Crystal Research and Technology

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“…The exothermic crystallization peak position distinctively shifted toward the lower temperature region with accompanying the peak broadening as the DTA heating rate decreased. The change with heating rate is expected when considered other DTA studies concerning the crystallization behavior of common glasses [10][11][12]. The changes of peak position with different heating rates were used to calculate activation energy for crystallization by using the known Kissinger method [13].…”

Section: Resultsmentioning

confidence: 99%

Crystallization behavior and microwave dielectric characteristics of ZnO-(La, Nd)2O3-B2O3-based dielectrics

Yeon

Saji

et al. 2007

J Electroceram

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Crystallizable zinc borate glasses modified with different contents of La 2 O 3 or Nd 2 O 3 were investigated as a potential low loss dielectric with respect to their crystallization behavior and microwave dielectric characteristics. The glasses were admixed with Al 2 O 3 filler and fired at 850°C for 30 min in air to prepare low temperature dielectrics. Crystallization behavior and microwave dielectric properties of the resulting samples strongly depended on the relative content of La 2 O 3 or Nd 2 O 3 in the glass. As a promising result, the composition of 0.15ZnO-0.25Nd 2 O 3 -0.6B 2 O 3 exhibited k∼6.5 and Q∼1194 at the resonant frequency of 18.9 GHz. Near zero temperature coefficient of frequency (TCF) was obtained by additional modification of the composition with ∼10 wt.% of TiO 2 filler. Crystallization kinetics of the samples was studied based on the differential thermal analysis (DTA) curves obtained with different heating rates. Correlation of the observed dielectric properties to the crystallization behavior is the main subject of this work.

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“…Synthesis of nanostructured materials is receiving significant attention as the result of their novel size-dependent properties [1]. Ternary transition metal oxides, including barium strontium titanate (BST), have attracted extensive interest due to the outstanding dielectric, piezoelectric, electrostrictive, and electrooptic properties [2][3][4][5]. Preparation and characterization of the BST nanoparticles or thin films have been widely studied [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Ternary transition metal oxides, including barium strontium titanate (BST), have attracted extensive interest due to the outstanding dielectric, piezoelectric, electrostrictive, and electrooptic properties [2][3][4][5]. Preparation and characterization of the BST nanoparticles or thin films have been widely studied [5][6][7]. However, the research about the fabrication of nanoporous BST material is still very limited.…”

Section: Introductionmentioning

confidence: 99%

Porous Barium Strontium Titanate-Titania Nanocomposites for Photocatalytic Applications

Zhang

Huang

Chan

et al. 2008

AMR

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Porous barium strontium titanate−titania (BST−TiO2) nanocomposite was developed by the combination of electrochemical anodization and hydrothermal synthesis. Self organized titania nanotube arrays were first fabricated by electrochemical anodization of titanium foil in 0.2 wt.% HF. The as-anodized titania was then used as a template and was subject to a hydrothermal treatment in the solution mixture of barium hydroxide and strontium hydroxide with different molar ratios. Well crystallized barium strontium titanate was developed directly from the titania nanotubes. Annealing was carried out to transform residual amorphous titania to crystallized anatase, resulting in the porous BST−TiO2 nanocomposite. The surface morphology and structure of the nanocomposite were characterized. The photoelectrochemical response of the BST−TiO2 composite was investigated and the photocatalytic property was evaluated through the photo-decomposition of an organic dye solution. The effect of hydrothermal parameters on the surface morphology and the photocatalytic activity of the nanocomposite was studied.

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Effect of excess TiO2 on the phase evolution and densification of sol-gel derived (Ba,Sr)TiO3 powders

Cited by 5 publications

References 17 publications

Synthesis of Ba₁₋_xSr_xTiO₃ (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Synthesis of Ba₁₋_xSr_xTiO₃ (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Crystallization behavior and microwave dielectric characteristics of ZnO-(La, Nd)2O3-B2O3-based dielectrics

Porous Barium Strontium Titanate-Titania Nanocomposites for Photocatalytic Applications

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Effect of excess TiO2 on the phase evolution and densification of sol-gel derived (Ba,Sr)TiO3 powders

Cited by 5 publications

References 17 publications

Synthesis of Ba1−xSrxTiO3 (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Synthesis of Ba1−xSrxTiO3 (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Crystallization behavior and microwave dielectric characteristics of ZnO-(La, Nd)2O3-B2O3-based dielectrics

Porous Barium Strontium Titanate-Titania Nanocomposites for Photocatalytic Applications

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Synthesis of Ba₁₋_xSr_xTiO₃ (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Synthesis of Ba₁₋_xSr_xTiO₃ (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties