The structure and texture genesis of apatite-type lanthanum silicates during their synthesis by co-precipitation

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• 作者：Tamara Kharlamova^a ; ^{kharlamova83@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Olga Vodyankina^a ; Alexander Matveev^b ; Vassilis Stathopoulos^c ; Arcady Ishchenko^d ; ^e ; Dzhalil Khabibulin^d ; ^e ; Vladislav Sadykov^d ; ^e
• 关键词：Apatite ; Lanthanum silicate ; Co-precipitation ; Formation mechanism
• 刊名：Ceramics International
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：41
• 期：10
• 页码：13393-13408
• 全文大小：3231 K

文摘

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, ²⁷Al and ²⁹Si 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.