Moharram Majdi - Department of engineering geology, Tarbiat Modares University, Tehran
Ali Orumiei - Department of engineering geology, Tarbiat Modares University, Tehran
Mohamadreza Nikudel - Department of engineering geology, Tarbiat Modares University, Tehran

mechanical behavior of nanoparticles is mainly dependent on the method of production in laboratory.Generally, production of nanoparticles in laboratory is done by conducting either chemical or mechanical methods. Thechemical methods include several techniques such as plasma arching, chemical vapour deposition and electricaldeposition. The mechanical method a ball mill is used to ground the particles down to nano scale dimension. Theadvantages of this method in comparison to the chemical method are: original integrity of the material is retained,production of nanoparticles can be made in large volume with low cost, ability of producting the nanoparticles indifferent sizes. By the use of electron microscope (FESEM), and the aid of several techniques such as XRD, XRF, DLSand BET tests , it can be assure that the produced materials are in the nano scale and mechanical behaviour of them isstudied by mentioned tests.In this paper, the mechanical behaviour of nanosilicate and nanokaolinite are investigated. The result showed thatspecific surface area of silica and kaolinite minerals increased to 3 and 8 times respectively after milling. Also chemicaland mineralogical compound is some initial compound and more than %95 initial powder reached to nanometer scale(<100 nm) by performance of ball milling. This study showed stability potential of produced nanoparticles lays instable threshold.

silicate and kaolinite nanoparticles, mechanical milling, specific surface area, potential of stability