Investigation of compaction of diatoms by die pressing and slip casting method  

Katarzyna Konopka 1Mikołaj Szafran 2Ewa Bobryk 2Anna W. Danelska 2

1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
2. Warsaw University of Technology, Faculty of Chemistry, Noakowskiego 3, Warszawa 00-664, Poland


Our introductory investigations were carried out on molding and sintering of diatomite materials. Two different types of diatomite material were used for this purpose – crystalline diatoms (specific surface BET = 1,52 m2/g) and amorphous diatoms (specific surface BET = 8,76 m2/g). The aim of this research was to elaborate a suitable method for obtaining dense sinters with preserved nanoporosity, which is typical for such materials. Two methods of molding were applied –die pressing at the pressure ranges 25 – 50 MPa with usage of different binders and a slip casting in gypsum mold with an array of various deflocculants and organic binders employed. Sophisticated and extraordinarily diversified forms of powder particles are not conducive to its densification. Slip casting made from diatoms reveals significant thixotropy and sedimentation. Moreover, there are also difficulties with powders molding, especially concerning amorphous diatoms. Open porosity and the rate of density were measured for the samples, which were sintered in the temperature range from 1000 to 1400ºC. The microstructure of aforesaid samples was analyzed by Scanning Electron Microscope.


This work was financially supported by Ministry of Science and Higher Education: Project no. N507438834


Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: must be provided.


Related papers
  1. Thermal stability of SiC nanowires and their resistance to mechanical stress during after-synthesis material treatment
  2. Characterization of diatoms consolidation
  3. Characteristic of surface topography of ancient pottery
  4. Deagglomeration process of nanoceramic powders-challenges and practice
  5. Deflocculation of nanozirconia powders
  6. Characteristic of Al2O3 – Ni composites obtained by slip casting method.
  7. Separation of oil impurities from oil in water emulsions enhance by modified surface of silica filters
  8. Kompozyty ceramika-metal
  9. Improvement of wetting and bonding of SiO2 ceramics and urea-urethane elastomer
  10. Sintering temperature effect on structure and properties of Al2O3/Ni-P composites with interpenetrating phases
  11. Polymer matrix composites with nanoparticles of TiC obtained by a sol-gel method
  13. Al2O3-Fe functionally graded materials fabricated under magnetic field
  14. Novel ceramic matrix composites with metal phase particles in the range from nano to micro - size
  15. The influence of temperature and pressure on possibility of obtaining Al2O3/Ni-P nanocomposite through hot pressing process.
  16. Microstructure of Ni-P thin layers obtained by a chemical method
  17. Studies of Ni-P Thin Films by Electroles Deposition Method

Presentation: Poster at E-MRS Fall Meeting 2008, Symposium I, by Katarzyna Konopka
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-14 14:25
Revised:   2009-06-07 00:48