The structure and texture genesis of apatite-type lanthanum silicates during their synthesis by co-precipitation. Issue 10 (December 2015)

• Record Type: Journal Article
• Authors: Kharlamova, Tamara; Vodyankina, Olga; Matveev, Alexander; Stathopoulos, Vassilis; Ishchenko, Arcady; Khabibulin, Dzhalil; Sadykov, Vladislav
• Is Part Of: Ceramics international. Volume 41:Issue 10(2015)Part A
• Page Start: 13393
• Page End: 13408
• Publication Date: 2015-12
• Subjects: Apatite -- Lanthanum silicate -- Co-precipitation -- Formation mechanism; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.07.128
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Peculiarities of genesis of the structure and texture of apatite-type lanthanum silicates, both undoped and doped with aluminum, in the course of co-precipitation followed by sediment thermal treatment were elucidated by using a combination of methods including thermal analysis, XRD, IR spectroscopy, low-temperature adsorption of nitrogen, 27 Al and 29 Si MAS NMR spectroscopy and TEM with EDX analysis. An amorphous lanthanum silicate with the short-range ordering typical for ortho-diorthosilicate was shown to be formed in the course of precipitation, while its crystallization proceeds via rearrangement of the polymeric structure of primary particles during subsequent thermal treatment.