A Comparative Study on the Phase Structure, Optical and NIR Reflectivity of BaFe12O19 Nano-Pigments by the Traditional and Modified Polyacrylamide Gel Method

2021 ◽  
Vol 67 ◽  
pp. 1-14
Author(s):  
Shi Fa Wang ◽  
Xiang Yu Chen ◽  
Hua Jing Gao ◽  
Lei Ming Fang ◽  
Qi Wei Hu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Particle Diameter ◽  
Barium Hexaferrite ◽  
Polyacrylamide Gel ◽  
Scanning Calorimetry ◽  
Gel Method ◽  
Infrared Reflection ◽  
High Efficient ◽  
Polyacrylamide Gel Method ◽  
Modified Polyacrylamide

Barium hexaferrite (BaFe12O19) nano- pigment is a pigment with high near infrared reflection in the wavelength range of 1400-2500 nm. The BaFe12O19 nano- pigments were synthesized by the traditional and modified polyacrylamide gel method and characterized by thermogravimetric and differential scanning calorimetry (TG-DSC) analyses, X-ray powder diffraction (XRD), fourier transform infrared (FTIR), transmission electron microscopy (TEM), and UV-Visible spectrophotometer. The physicochemical properties of BaFe12O19 nanopigments are strongly dependent on the synthesis route. The introduction of carbon particles into the BaFe12O19 precursor accelerates the formation of BaFe12O19 phase, reduces its particle diameter and changes its color properties. The modified polyacrylamide gel method makes it possible to obtain a high efficient near infrared reflection BaFe12O19 nano- pigments with a solar reflectance SR>90%. The high near infrared reflection makes BaFe12O19 nano- pigments have potential applications in the field of heat shielding.

A modified polyacrylamide gel method for assessing the extraction of gliadins

1990 ◽  
Vol 38 (4) ◽  
pp. 982-985
Author(s):  
Pascale T. Guiraud ◽  
Francoise M. Seigle-Murandi ◽  
Regine L. Steiman ◽  
Jean Claude M. Potie
Keyword(s):  
Polyacrylamide Gel ◽  
Gel Method ◽  
Polyacrylamide Gel Method ◽  
Modified Polyacrylamide

Rapid Synthesis of Bi Substituted Ca3Co4O9 by a Polyacrylamide Gel Method and its High-Temperature Thermoelectric Power Factor

2010 ◽  
Vol 434-435 ◽  
pp. 393-396 ◽  
Author(s):  
Ying Song ◽  
Qiu Sun ◽  
Li Rong Zhao ◽  
Fu Ping Wang
Keyword(s):  
High Temperature ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Solid State Reaction Method ◽  
Polyacrylamide Gel ◽  
Measured Temperature ◽  
Thermoelectric Power Factor ◽  
Gel Method ◽  
Plasma Sintering ◽  
Polyacrylamide Gel Method

A series of polycrystalline (Ca1-xBix)3Co4O9 ( x = 0.0 ~ 0.075 ) powders were synthesized rapidly by a polyacrylamide gel method. The dense ceramics were fabricated using the spark plasma sintering ( SPS ) technique. Effects of Bi substitution on high temperature thermoelectric properties of Ca3Co4O9 were evaluated. Both the electrical conductivity and Seebeck coefficient increased with increasing Bi content up to x = 0.05, thus leading to an enhanced thermoelectric power factor. The Bi substituted sample with x = 0.05 obtained in this study has the highest thermoelectric power factor in the measured temperature range. It reaches 4.810-4 Wm-1K-2 at 700 °C, which is 26 % higher than that of Ca3Co4O9 without Bi substitution, and is by up to 15 % larger as compared to the Bi substituted sample synthesized by the solid state reaction method and the SPS technique due to the high chemical homogeneous powder prepared by the polyacrylamide gel method.

Preparation of nano-TiO 2 powder by polyacrylamide gel method

2009 ◽  
Author(s):  
Xiaowei Fan ◽  
Xiaoping Liang ◽  
Guanqun Guo ◽  
Rongtao Wang ◽  
Jianxin Li
Keyword(s):  
Polyacrylamide Gel ◽  
Gel Method ◽  
Polyacrylamide Gel Method

Effect of excess Ca2+ on the formation of CaZrO3 powders via polyacrylamide gel method

2019 ◽  
Vol 9 (4) ◽  
pp. 310-318 ◽  
Author(s):  
Kuo Huang ◽  
Bin Xie ◽  
Xiaoyang Chen ◽  
Yi Zhang ◽  
Taolan Mo ◽  
...  
Keyword(s):  
Polyacrylamide Gel ◽  
Gel Method ◽  
Polyacrylamide Gel Method
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