scholarly journals Sol-Gel Synthesis, Structural Characterization and Microwave Dielectric Properties of Bismuth Niobate Modified by Iron Inclusion

2017 ◽  
Author(s):  
Susana Devesa ◽  
Manuel P.F. Graça ◽  
Luís C. Costa
Keyword(s):  
Dielectric Properties ◽  
Structural Characterization ◽  
Sol Gel ◽  
Microwave Dielectric Properties ◽  
Bismuth Niobate ◽  
Microwave Dielectric ◽  
Sol Gel Synthesis

Sol-Gel Synthesis and Characterization of LaAlO3 Nanoparticles Using Gelatin as Organic Precursor

2010 ◽  
Vol 105-106 ◽  
pp. 242-244
Author(s):  
Zhong Qing Tian ◽  
You Li Yang ◽  
Lin Lin
Keyword(s):  
Dielectric Properties ◽  
Sol Gel ◽  
Microwave Dielectric Properties ◽  
Organic Precursor ◽  
Lattice Matching ◽  
Microwave Dielectric ◽  
Transmission Electron ◽  
Dta Analysis ◽  
Bet Technique ◽  
Sol Gel Synthesis

LaAlO3 has gained attention in the last few years because of its favorable microwave dielectric properties, excellent lattice matching and a good matching for thermal expansion. Nanoparticles of LaAlO3 were produced by using gelatin as an organic precursor. The optimum temperature for the phase formation of the precursor sample is found out by TG/DTA analysis. The specific surface area of the powder was measured by the BET technique with nitrogen. X-ray diffraction (XRD) was used to determine the phases present in the calcined powders and to estimate particle size. The morphology of LaAlO3 powder was studied by transmission electron microscopy (TEM). Microwave dielectric properties were measured using a HP8722ET network analyzer. The results demonstrate that pure perovskite LaAlO3 powder formed at 800 °C for 2 h. And the crystallite size was in the range of 17-48 nm. The specimen sintered at 1450 °C for 8 h shows 97.4% of the theoretical density and gave the excellent microwave dielectric properties: εr=23.3 and Qf=32300 GHz.

Microstructure and Microwave Dielectric Properties of BaTi4O9 Ceramics Derived from a Sol-Gel Precursor

2011 ◽  
Vol 326 ◽  
pp. 127-130
Author(s):  
Xian Li Huang ◽  
Fu Ping Wang ◽  
Ying Song
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Sol Gel ◽  
Microwave Dielectric Properties ◽  
Sintering Process ◽  
Temperature Coefficients ◽  
Microwave Dielectric ◽  
Ceramic Samples ◽  
Quality Factor Q

In the present work, the microstructure and microwave dielectric properties of BaTi4O9 ceramics derived from a sol-gel precursor were presented. Density measuring results demonstrated that the largest densities of ceramic sample about 96.7% could be reached by virtue of a cool iso-static press and a sintering process at at 1300 °C for 6 hours. The dielectric constant (εr), quality factor (Q×f) and the temperature coefficients (τf) of the BaTi4O9 ceramic samples were 36.65, 28000 GHz, +20.2 ppm/°C, respectively. XRD, SEM and XPS were used to characterize the microstructure of the ceramics samples. Substantial Ti3+ was proposed to be the cause of dielectric loss.

Microwave dielectric properties of sol-gel derived NiZrNb2O8 ceramics

2018 ◽  
Vol 747 ◽  
pp. 394-400 ◽  
Author(s):  
Mengjuan Wu ◽  
Yingchun Zhang ◽  
Jundan Chen ◽  
Maoqiao Xiang
Keyword(s):  
Dielectric Properties ◽  
Sol Gel ◽  
Microwave Dielectric Properties ◽  
Microwave Dielectric

Nano powder and Microwave Dielectric Properties of Sol–Gel-Derived Zr0.8Sn0.2TiO4Ceramics

2005 ◽  
Vol 44 (8) ◽  
pp. 6152-6155 ◽  
Author(s):  
Yung-Shou Ho ◽  
Min-Hung Weng ◽  
Bun-Ton Dai ◽  
Shuen-Shian Wang
Keyword(s):  
Dielectric Properties ◽  
Sol Gel ◽  
Microwave Dielectric Properties ◽  
Microwave Dielectric ◽  
Nano Powder

Synthesis and microwave dielectric properties of columbite-structure MgNb2O6 ceramics by aqueous sol–gel technique

2012 ◽  
Vol 28 (2-3) ◽  
pp. 191-196 ◽  
Author(s):  
H. T. Wu ◽  
Y. S. Jiang ◽  
W. B. Wu ◽  
F. Yang ◽  
Y. L. Yue
Keyword(s):  
Dielectric Properties ◽  
Sol Gel ◽  
Microwave Dielectric Properties ◽  
Microwave Dielectric ◽  
Gel Technique

Sintering Behavior and Microwave Dielectric Properties of MgTiO3 Ceramics Doped with B2O3 by Sol-Gel Method

2012 ◽  
Vol 28 (8) ◽  
pp. 751-755 ◽  
Author(s):  
Huanping Wang ◽  
Qinghua Yang ◽  
Denghao Li ◽  
Lihui Huang ◽  
Shilong Zhao ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Sol Gel ◽  
Microwave Dielectric Properties ◽  
Sintering Behavior ◽  
Gel Method ◽  
Sol Gel Method ◽  
Microwave Dielectric
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