A green and facile route to synthesize calcium silicate nanowires

• Published in: Materials characterization Vol. 61; no. 11; pp. 1281 - 1285
• Main Authors: Pei, L.Z., Yang, L.J., Yang, Y., Fan, C.G., Yin, W.Y., Chen, J., Zhang, Q.F.
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01.11.2010; Elsevier
• Subjects: Calcination; Calcium silicate nanowires; Calcium silicates; Characterizations; Cross-disciplinary physics: materials science; rheology; Crystal structure; Exact sciences and technology; Hydrothermal process; Materials science; Nanocomposites; Nanomaterials; Nanostructure; Nanowires; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Raw materials; Solidification; Xonotlite nanowires; Characterizations; Calcium silicate nanowires; Hydrothermal process; Xonotlite nanowires; Calcium silicate
• ISSN: 1044-5803; 1873-4189
• DOI: 10.1016/j.matchar.2010.07.002

Large-scale single crystalline calcium silicate nanowires have been synthesized via a simple and facile hydrothermal route using nanoscale SiO 2 and CaO powders as the starting materials. Xonotlite [Ca 6(Si 6O 17)(OH) 2] nanowires were first achieved after hydrothermal treatment at 220 °C for 12 h. After being calcinated at 800 °C for 1 h, the Ca 6(Si 6O 17)(OH) 2 nanowires are completely transformed into β-CaSiO 3 nanowires. The β-CaSiO 3 nanowires have a diameter of 30–150 nm and a length of tens of micrometers. The hydrothermal conditions and the size of the raw materials play important roles on the size of the nanowires. A possible growth mechanism of the nanowires is also proposed.