Publication Date:
2015-03-26
Description:
An environmentally friendly NaCl–H 2 O(v) system was developed to prepare β-CaSiO 3 nanostructures from commercially available raw materials, CaCO 3 and amorphous SiO 2 (α-SiO 2 ), by a one-step solid-state reaction at 575°C for 2 h. The formation of β-CaSiO 3 was accelerated by NaCl–H 2 O(v) system. The results demonstrated that both NaCl and H 2 O(v) played vital roles in the formation of β-CaSiO 3 nanostructures at a lower temperature. NaCl is considered to enhance the diffusivity of starting materials and the rate of solid-state reactions, and promote the crystallization at lower temperature. Water vapor can accelerate the decomposition of CaCO 3 , and absorbed water on the surface of solid materials can dissolve NaCl to form an aqueous ionic liquid composed of Na and Cl ions, which is similar to a hydrothermal process, and will further increase the diffusivity of components and reduce the reaction temperature.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Permalink