Fabrication of hollow silica aerogel spheres by a droplet generation method and sol–gel processing

1989 ◽  
Vol 7 (3) ◽  
pp. 1181-1184 ◽  
Author(s):  
N. K. Kim ◽  
K. Kim ◽  
D. A. Payne ◽  
R. S. Upadhye
Keyword(s):  
Silica Aerogel ◽  
Sol Gel ◽  
Droplet Generation ◽  
Hollow Silica ◽  
Gel Processing

Fabrication of Glass Micro- and Nanospheres from Liquid Precursors Using Droplet Generation and Sol-Gel Processing

1994 ◽  
Vol 372 ◽  
Author(s):  
Kyekyoon Kim
Keyword(s):  
Sol Gel ◽  
Droplet Generation ◽  
Silica Spheres ◽  
Generation Process ◽  
Hollow Silica ◽  
Nanometer Range ◽  
Glass Spheres ◽  
Liquid Precursors ◽  
Controlled Porosity ◽  
Gel Processing

AbstractTwo novel methods particularly suitable for continuously fabricating uniform glass spheres are described, one suitable for spheres micrometers to millimeters in diameter and the other for spheres of diameters in the submicron range, down to tens of nanometers. Both methods start from liquid precursors and combine droplet generation which is effected by a nozzle with sol-gel processing. One difference is that in the latter method, which is termed the charged liquid cluster beam (CLCB) technique, one employs flow-limited field-injection electrostatic spraying to further reduce the size of the drops to the nanometer range in the droplet generation process. Using the two methods, uniform hollow silica aerogel spheres, micrometer to millimeter in diameter, of controlled porosity and silica spheres with diameters in the nanometer range were produced. By utilizing the appropriate liquid precursors, the present methods can fabricate spheres composed of a variety of materials, including glass. Due to its ability to fabricate nanodrops, the CLCB technique is suited to fabricating nanoparticles as well as thin films of controlled stoichiometry and chemical composition.

Hollow Silica Spheres of Controlled Size and Porosity by Sol-Gel Processing

1991 ◽  
Vol 74 (8) ◽  
pp. 1987-1992 ◽  
Author(s):  
Kyekyoon (Kevin) Kim ◽  
Kam Yong Jang ◽  
Ravindra S. Upadhye
Keyword(s):  
Sol Gel ◽  
Silica Spheres ◽  
Hollow Silica ◽  
Hollow Silica Spheres ◽  
Gel Processing

Mechanical and Adiabatic Properties of Silica Aerogel Doped with TiO2 Nanowire

2014 ◽  
Vol 633 ◽  
pp. 336-339
Author(s):  
Zhao Kui Jin ◽  
Xiong Peng ◽  
Hong Yi Gao ◽  
Chao Hao Peng ◽  
Yi Luan
Keyword(s):  
Silica Aerogel ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Nitrogen Adsorption ◽  
Supercritical Drying ◽  
Drying Methods ◽  
X Ray Diffraction ◽  
Static Compression ◽  
Gel Processing

A novel silica aerogel insulation composite was prepared by using TiO2 nanowires as modifier via sol-gel processing and supercritical drying methods in order to address issues of the poor mechanical and the infrared shading performance of silica aerogel. The effects of TiO2 nanowire content on the mechanical and adiabatic performance were investigated by X-Ray diffraction (XRD), nitrogen adsorption (BET), field emission scanning electron microscopy (FESEM), static compression test and thermal analysis. The results show that TiO2 nanowire reinforced aerogels had great thermal insulation properties, while high surface area, low density and mechanical strength were retained.

Synthesis and characterization of BaMgAl10O17:Eu phosphors derived by sol–gel processing

2002 ◽  
Vol 126 (2) ◽  
pp. 161-165 ◽  
Author(s):  
Junying Zhang ◽  
Zhongtai Zhang ◽  
Zilong Tang ◽  
Zishan Zheng ◽  
Yuanhua Lin
Keyword(s):  
Sol Gel ◽  
Synthesis And Characterization ◽  
Gel Processing
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