Preparation of Macroprous C12A7 Mayenite Monoliths via a Sol-Gel Process with Nitrates as Precursors

2018 ◽  
Vol 768 ◽  
pp. 211-217 ◽  
Author(s):  
Rui Wang ◽  
Yu Kun Sun ◽  
Bao Jia Qi Jiang ◽  
Hui Yang ◽  
Xing Zhong Guo
Keyword(s):  
Heat Treatment ◽  
Phase Separation ◽  
Binary System ◽  
Propylene Oxide ◽  
Crystalline Phase ◽  
Sol Gel ◽  
Single Crystalline ◽  
Sol Gel Process

Macroporous Ca12Al14O33(C12A7) mayenite monoliths have been successfully prepared via a sol-gel process in the presence of propylene oxide (PO) and poly (ethyleneoxide) (PEO). Gelation of CaO-Al2O3binary system with nitrates salts as additional precursors is accelerated by PO as an acid scavenger, while PEO works as a phase separation inducer to mediate the phase separation of the system. Appropriate PO and PEO amounts allow the formation of monolithic xerogel with interconnected macropores and co-continuous skeletons. The resultant dried gels are amorphous and the single crystalline phase Ca12Al14O33mayenite forms after heat-treatment at 1100 °C in air, while the macrostructure is preserved with a porosity as high as 78% and smoother and denser skeletons.

Facile synthesis of monolithic mayenite with well-defined macropores via an epoxide-mediated sol–gel process accompanied by phase separation

2014 ◽  
Vol 38 (12) ◽  
pp. 5832-5839 ◽  
Author(s):  
Xingzhong Guo ◽  
Xiaobo Cai ◽  
Jie Song ◽  
Yang Zhu ◽  
Kazuki Nakanishi ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Phase Separation ◽  
Sol Gel ◽  
High Porosity ◽  
Macroporous Structure ◽  
Facile Synthesis ◽  
Sol Gel Process

Monolithic mayenite has been successfully prepared via a sol–gel process followed by heat-treatment, exhibiting co-continuous macroporous structure and high porosity.

scholarly journals Anodizing of Aluminum Coated with Zirconium Oxide by a Sol-Gel Process I. Effect of Heat Treatment on the Formation of the Anodic Oxide Film

1999 ◽  
Vol 67 (12) ◽  
pp. 1243-1248 ◽  
Author(s):  
Keiji WATANABE ◽  
Masatoshi SAKAIRI ◽  
Hideaki TAKAHASHI ◽  
Katsumi TAKAHIRO ◽  
Shinji NAGATA ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Oxide Film ◽  
Zirconium Oxide ◽  
Sol Gel ◽  
Anodic Oxide ◽  
Anodic Oxide Film ◽  
Sol Gel Process

Iron(iii) oxyhydroxide and oxide monoliths with controlled multiscale porosity: synthesis and their adsorption performance

2018 ◽  
Vol 6 (19) ◽  
pp. 9041-9048 ◽  
Author(s):  
Yosuke Hara ◽  
Kazuyoshi Kanamori ◽  
Kei Morisato ◽  
Riichi Miyamoto ◽  
Kazuki Nakanishi
Keyword(s):  
Phase Separation ◽  
Sol Gel ◽  
Adsorption Performance ◽  
Sol Gel Process

Iron(iii) oxyhydroxide and oxide monoliths with controlled multiscale porosity have been successfully fabricated via the sol–gel process accompanied by phase separation.

Synthesis of hierarchically porous MnO/C composites via a sol–gel process followed by two-step combustion for lithium-ion batteries

2020 ◽  
Vol 44 (28) ◽  
pp. 12307-12316
Author(s):  
Wei Liu ◽  
Daoyan Feng ◽  
Hui Yang ◽  
Xingzhong Guo
Keyword(s):  
Phase Separation ◽  
Lithium Ion Batteries ◽  
Sol Gel ◽  
Lithium Ion ◽  
Hierarchically Porous ◽  
Sol Gel Process

Hierarchically porous MnO/C composites with interconnected macropores and co-continuous skeletons were fabricated via a sol–gel process combined with phase separation, followed by a two-step combustion.

Novel approach of silica-PVA hybrid aerogel synthesis by simultaneous sol-gel process and phase separation

2020 ◽  
Vol 166 ◽  
pp. 104997
Author(s):  
Bartosz Babiarczuk ◽  
Daniel Lewandowski ◽  
Anna Szczurek ◽  
Krzysztof Kierzek ◽  
Matthias Meffert ◽  
...  
Keyword(s):  
Phase Separation ◽  
Sol Gel ◽  
Novel Approach ◽  
Sol Gel Process ◽  
Hybrid Aerogel

Low Temperature Preparation of Mullite Whisker via Non-Hydrolytic Sol-Gel Process Combined with Molten Salt Method

2014 ◽  
Vol 936 ◽  
pp. 975-980 ◽  
Author(s):  
Kai Lin Fu ◽  
Wei Hui Jiang ◽  
Guo Feng ◽  
Jian Min Liu ◽  
Qian Wu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Low Temperature ◽  
Molten Salt ◽  
Sol Gel ◽  
Growth Direction ◽  
Treatment Temperature ◽  
Molten Salt Method ◽  
Low Temperature Preparation ◽  
Sol Gel Process ◽  
Temperature Preparation

Mullite whisker was prepared at low temperature via non-hydrolytic sol-gel (NHSG) process combined with molten salt method. The influence of heat treatment temperature was studied on the morphology and the microstructure of whisker, and its growth mechanism was also described. The results show that the mullite whisker appears at the lowest temperature of 750 °C, and optimized mullite whisker can be prepared at 850 °C with the growth direction of [00, whose diameter is in the range of 170~300 nm with the aspect ratio of >30.

Sign in / Sign up

Export Citation Format

Share Document