A facile citric acid assisted sol–gel method for preparing monolithic yttria-stabilized zirconia aerogel

RSC Advances ◽  
2015 ◽  
Vol 5 (102) ◽  
pp. 84280-84283 ◽  
Author(s):  
Zhiyi Zhang ◽  
Qiuyue Gao ◽  
Yi Liu ◽  
Chunmei Zhou ◽  
Mingjia Zhi ◽  
...  
Keyword(s):  
Citric Acid ◽  
Sol Gel ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Gel Method ◽  
Sol Gel Method ◽  
Environmental Friendly ◽  
Monolithic Zirconia ◽  
Zirconia Aerogel

Citric acid was used as the cheap and environmental friendly gelation accelerator for preparation of monolithic zirconia aerogel.

KNN-BF Lead-Free Piezoelectric Ceramics Synthesized by Sol-Gel Method

2015 ◽  
Vol 740 ◽  
pp. 3-6
Author(s):  
Guo Yuan Cheng ◽  
Xing Hua Fu ◽  
Xin Jin ◽  
Wen Hong Tao ◽  
Yu Qin Qiang
Keyword(s):  
Comparative Analysis ◽  
Citric Acid ◽  
Dielectric Loss ◽  
Sintering Temperature ◽  
Sol Gel ◽  
Piezoelectric Ceramics ◽  
Lead Free ◽  
Gel Method ◽  
Sol Gel Method ◽  
Metal Chelator

KNN-BF piezoelectric ceramics synthesized by sol-gel method in this experiment. By controlling bismuth and iron content in the system to study effects of them. We selected citric acid as metal chelator and ethylene glycol as esterification agent. PH maintained 5-6 during preparation of the sol. Sintering temperature of ceramic selected 1100°C. Preparation ceramics under these conditions and comparative analysis, the structure of ceramics is single perovskite and shap of crystals are square block. With the increase of x, properties of ceramics firstly increases and then decreases: d33, εr, Qm, Kpreaching the maximum, values of them were 136pC/N, 630(f =1KHz), 212, 0.41 respectively; dielectric loss to minimum is 0.07(f =1KHz); at this point, ceramics had best performance.

Study on the Synthesis of Batches of the System Y-Ba-Cu-O Using Sol-Gel Method

2014 ◽  
Vol 91 ◽  
pp. 19-23
Author(s):  
Plamen Pashev ◽  
Rositsa Raykova ◽  
Yancho Hristov ◽  
Bogdan Bogdanov
Keyword(s):  
Particle Size ◽  
Citric Acid ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Blue Solution ◽  
Transformation Processes ◽  
Nitrate Solutions ◽  
Thermally Treated

The study presented deal with preparation of batches of the system Y-Ba-Cu-O using sol-gel method and citric acid as precursor. Batches with particle size of 100 nm containing each of the phases Y123 and Y211 were prepared. The stoichiometric amounts of Y, Ba and Cu oxides were dissolved in 65% HNO3 until clear blue solution was observed under heating to 80 ̊С. The nitrate solutions obtained were neutralized to pH = 6 with 25% solution of NH3 (p.a.), then С6Н8О7 was added as the gels obtained were thermally treated. The transformation processes taking place under change of temperature were studied by IR, XRD, DTA and SEM.

Effect of the annealing temperature and of Bi substitution on the structural and magnetic behaviors of double-doping (Bi/La, Ca) (La0.8Ca0.2)1−xBixFeO3 compounds

2020 ◽  
Vol 44 (23) ◽  
pp. 9813-9821
Author(s):  
H. Issaoui ◽  
A. Benali ◽  
M. Bejar ◽  
E. Dhahri ◽  
R. F. Santos ◽  
...  
Keyword(s):  
Citric Acid ◽  
Curie Temperature ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Double Doping

Perovskite (La0.8Ca0.2)1−xBixFeO3 compounds were synthesized by sol–gel method using the citric acid route and sintered at 800 °C and 900 °C. LCBFO 800 series has the smallest size of crystallites, a larger magnetization and a smaller Curie temperature.

Nickel oxide aerogel for high performance supercapacitor electrodes

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112620-112624 ◽  
Author(s):  
Zhiyi Zhang ◽  
Qiuyue Gao ◽  
Haibo Gao ◽  
Zhenyu Shi ◽  
Junwei Wu ◽  
...  
Keyword(s):  
Citric Acid ◽  
Nickel Oxide ◽  
High Performance ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Monolithic NiO aerogels were prepared by a facile citric acid assisted sol–gel method for supercapacitor electrodes.

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