12 Questions 6 Answers 0 Followers
Questions related from Hossein Ahmadi
I need to measure gas concentration in a system before and after filtering. But I don't have access to some of these gases sensors and I don't have enough information about available analysis...
24 January 2020 3,672 3 View
I'm aware of respiratory system deseases caused by crystalline silica (C-SiO2), but does elemental silicon (nanostructured silicon) have negative effects on lungs? Are there any article and...
27 November 2019 4,709 3 View
Amorphous silicon has lower volumetric change than crystalline silicon during first cycles of charge and discharge. How can we prepare amorpous silicon from nanostructured crystalline silicon? Is...
26 November 2019 7,038 4 View
High energy ball milling used to prepare silicon micro and nano particles. I used magnetic separation to remove iron. But there is a small amount of iron left in the suspension. How can I remove...
24 July 2019 3,661 2 View
It's a coating with few micrometers in thickness. There are equations for thickness prediction. But for using them, I need to know the coating density. I'm using spray coating method. The...
12 July 2019 4,402 3 View
I need a rough copper surface for good adhesion as a conductive substrate. Copper foil thickness is about 20 microns.
26 February 2019 9,495 5 View
I need the silicon (NOT the silica) colloid to be stable for a few hours. which one is the best, Water, ethanol, ethylene Glycol, or something else?? Do I need to use any surfactant?
23 January 2019 798 1 View
can we see the grains and grain boundaries without using any etching procedure by SEM?
27 December 2017 4,169 1 View
which solution is better? perchloric or phosphoric acid solution. Any experiences?
22 December 2017 6,216 2 View
After cold rolling of an aluminum 5xxx alloy and then recrystallization of that,can we see the flow lines in the microstructure or they disappear? Mechanical polishing didn't make them...
21 December 2017 8,023 3 View
I need to achieve maximum impact energy and hardness at the same time.Any experiment or reliable article??
07 September 2017 198 2 View
etching at elevated temperature? electroetching? or some special etchants??
18 June 2017 936 3 View
