Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
4188998
Reference Type
Journal Article
Title
Porous ceramic monoliths based on diatomite
Author(s)
Saponjic, A; Stankovic, M; Majstorovic, J; Matovic, B; Ilic, S; Egelja, A; Kokunesoski, M
Year
2015
Is Peer Reviewed?
1
Journal
Ceramics International
ISSN:
0272-8842
EISSN:
1873-3956
Volume
41
Issue
8
Page Numbers
9745-9752
DOI
10.1016/j.ceramint.2015.04.046
Web of Science Id
WOS:000356549100071
Abstract
Porous silica ceramics were obtained at low forming pressure and low sintering temperature by using diatomaceous earth as a silica source and boric acid as an inexpensive additive. The starting raw material, diatomite from surface coal mine Kolubara, Serbia, was purified from organic and inorganic impurities by using heat and chemical treatment. Boric acid was used as binding and sintering aid up to 2 wt%. Powder was compacted by using different pressures of 40, 60 and 80 MPa. The pressed samples were sintered at 850, 1000, 1150, and 1300 degrees C for 4 h in air. A relatively high porosity in the range of 60-70% is obtained for the samples pressed at 40, 60 and 80 MPa and sintered at 1000 degrees C. Median pore size diameters are in the range of macroporous up to 2 mu m in the samples sintered at 1150 and 1300 degrees C. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scaning electron microscopy (SEM) and mercury porosimetry measurements were employed to characterize the phases, functional groups, microstructure and pore size distribution of the obtained samples. In addition, measurements of densities and open porosities by immersion technique, according to Archimedes principle, were used. The relations between mechanical properties (Young modulus, Poisson ratio, and compressive strength) versus content of boric acid in the investigated samples were studied and disscussed. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Keywords
Sintering; Porosity; Diatomite; Boric acid
Tags
•
Methylmercury
ADME Search: Jan 1990 - Nov 2018
Results with mercury
WoS
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity