期刊名称：Lecture Notes in Engineering and Computer Science
印刷版ISSN：2078-0958
电子版ISSN：2078-0966
出版年度：2019
卷号：2239
页码：310-317
出版社：Newswood and International Association of Engineers
摘要：The hydrated silica frustules (exoskeletons) of
diatomic algae are a prominent and fascinating example of
Nature’s neat nanostructuration [1], achieved with low
temperature and pressure processes, without the use of
aggressive chemicals, and on the global scale. There is a
growing interest in understanding and exploiting nature-like
processes to improve the energy efficiency and sustainability of
industrial fabrication. The present paper reports the results
obtained during the fabrication of bulk porous silica ceramics
by sintering and freeze-casting of diatomite earth slurries with
the purpose of preserving and creating multi-scale porosity at
the nano-, micro-, and macro-scale. In the course of fabrication
processing, the samples were characterized by X-ray powder
diffraction as a means of providing phase identification and
observing phase transitions in silica. The slurry preparation
was optimized to ensure consistent properties of the obtained
hierarchically structured materials (diatomite earth poroids)
for biomedical applications.
