Microstructure and dielectric properties of ST ceramics prepared by the sol–gel combustion technique with chitosan addition

2015 ◽  
Vol 41 ◽  
pp. S117-S122 ◽  
Author(s):  
Thanawat Klaytae ◽  
Sarawut Thountom
2015 ◽  
Vol 3 (35) ◽  
pp. 18059-18063 ◽  
Author(s):  
B. Venkata Rami Reddy ◽  
R. Ravikumar ◽  
C. Nithya ◽  
S. Gopukumar

A high performance NaxCoO2 cathode material for sodium ion batteries has been synthesized using a sol–gel combustion technique using glycine as a chelating agent.


2012 ◽  
Vol 554-556 ◽  
pp. 636-639
Author(s):  
Qi Fu Bao ◽  
Wei Xia Dong ◽  
Qi Bing Chang ◽  
Jian Er Zhou

A green silicon-containing carbon black pigment was synthesized via a sol-geo combustion technique using TEOS and black ink as raw materials. The obtained black pigment was characterized by XRD, TEM and UV-vis absorption spectrophotometer. The results show that the silicon coated with carbon black pigment can be formed at pH ≥ 2 and the black pigment does not change its color after calcinations at 1300 °C in air implying the carbon black is coated completely with SiO2. When pH is 4, the properties of as-prepared sample are similar with the conventional high-temperature pigment. XRD and SEM further confirm that silicon coats with carbon black fully. The silica/ carbon black pigment may represent an opportunity for the applications in the decoration of the high-temperature ceramic.


2021 ◽  
Author(s):  
Jude Fernandez ◽  
B Bindhu ◽  
M. Prabu ◽  
KY Sandhya

Abstract Calcium and hafnium co-doped barium titanate could be used as a replacement for lead zirconate titanate, which is a lead-based ferroelectric material. Solid state reaction accompanied by the usual sintering technique is the classical ceramic-processing method, which demands a lot of time and effort. The present work aims to make the process a lot easier and quicker by employing a modified sol-gel combustion technique to synthesize polycrystalline Ba0.85Ca0.15Ti(1-x)HfxO3 (x=0.00, 0.05, 0.10, 0.15) electro ceramics . The molar ration is fixed at 1:1 for metal and citric acid at pH ~ 1. It was found that Ba0.85Ca0.15Ti(1-x)HfxO3 (where x=0.00, 0.05, 0.10, 0.15) crystallizes completely at around 1000 °C which is much lower than traditional methods. The structure supposedly displays a tetragonal symmetry with the P4mm space group as confirmed through x-ray diffraction (XRD) and Raman spectroscopy.


RSC Advances ◽  
2018 ◽  
Vol 8 (25) ◽  
pp. 14120-14128 ◽  
Author(s):  
M. A. Dar ◽  
Dinesh Varshney

The room temperature structural, optical and dielectric properties of Mg0.95Mn0.05O and Mg0.95Mn0.01TM0.04O (TM = Co, Ni, and Cu) nanoparticles are reported.


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