Infrared characteristic bands of highly dispersed silica

1964 ◽  
Vol 195 (1) ◽  
pp. 12-16 ◽  
Author(s):  
Tsutomu Takamura ◽  
Hiromi Yoshida ◽  
Kiyokatsu Inazuka
Keyword(s):  
Highly Dispersed Silica ◽  
Highly Dispersed

scholarly journals PREPARATION AND CHARACTERIZATION OF SILICA/PMMA COMPOSITES WITH HIGHLY DISPERSED SILICA—�?�DISPERSIBILITY

2012 ◽  
Vol 012 (5) ◽  
pp. 528-533
Author(s):  
Dong-ming Qi ◽  
Rui Zhang ◽  
Jie Xu ◽  
Xing-cong Shen ◽  
Ming-hua Wu
Keyword(s):  
Highly Dispersed Silica ◽  
Highly Dispersed

Cullet-Filled Concrete

2020 ◽  
Vol 992 ◽  
pp. 73-78
Author(s):  
V.N. Shishkanova ◽  
M.V. Ivanko ◽  
Andrey Yu. Kozlov
Keyword(s):  
Silica Fume ◽  
Large Particle ◽  
Concrete Strength ◽  
Highly Dispersed Silica ◽  
Concrete Mixtures ◽  
Highly Dispersed ◽  
Polymer Component ◽  
Rock Microstructure ◽  
Very High ◽  
Cullet Content

The paper considers how cullet of different particle-size distribution affects the concrete strength. Experiments have proven that large-particle cullet (1.25 cm or larger) could be used as an aggregate; the concrete strength will be on par with those of ordinary natural/crushed sand concrete. The paper proves the feasibility of injecting highly dispersed silica fume in combination with effective polycarboxylate-based superplasticizers in cullet-based concrete mixtures. Highly dispersed silica fume will positively affect the strength characteristics of concrete, as silica fume in cement rock reacts with Са (ОН)2, which is released upon the hydration of the clinker minerals С3S and С2S; the reaction produces very strong compounds. Concretes containing up to 30% silica fume in combination with a superplasticizer will feature very high early strength. Use of strong aggregates with a 30% cullet content can produce strong concretes; after steamed, a concrete containing silica fume and polycarboxylate-based superplasticizer will reach 90% of the graded strength. Cement-rock microstructure studies show that the polymer component of the STACHEMENT 2280 superplasticizer will gradually transcend from the glass grains to the cement rock. The interface between the polymer-coated glass grains and the cement rock is blurred and barely present. This strengthens the glass-rock adhesion and improves the concrete strength. This is why cullet is recommended for use in the production of curb stones.

Effects of highly dispersed silica nanoparticleson the cryoresistance of the bovine cumulus-oocyte complexes

Cryobiology ◽  
2018 ◽  
Vol 85 ◽  
pp. 176
Author(s):  
Irena Chistiakova ◽  
Tatiana Kuzmina ◽  
Tatiana Stanislavovich ◽  
Svetlana Kovtun
Keyword(s):  
Highly Dispersed Silica ◽  
Highly Dispersed

Phosphine-stabilized Pd nanoparticles supported on silica as a highly active catalyst for the Suzuki–Miyaura cross-coupling reaction

RSC Advances ◽  
2015 ◽  
Vol 5 (5) ◽  
pp. 3512-3520 ◽  
Author(s):  
Debojeet Sahu ◽  
Pankaj Das
Keyword(s):  
Active Catalyst ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Pd Nanoparticles ◽  
Highly Dispersed Silica ◽  
Simple Strategy ◽  
Highly Active ◽  
Cross Coupling Reaction ◽  
Highly Dispersed ◽  
Supported Pd

Highly dispersed silica-supported Pd nanoparticles were synthesizedviaa simple strategy. The material showed excellent catalytic activity for Suzuki–Miyaura reactions and could be reused several times.

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