20 Questions 139 Answers 0 Followers
Questions related from Mohammed M. Obeid
Dear experts, I am struggling to calculate the accurate weights of starting precursors to represent the formula Mg0.95Ni0.04Cr0.01O. The precursors are: 1. Mg(NO3)2.6H2O (M.W = 256.4 g/mol), M.W...
04 April 2019 8,118 5 View
Dear RG members, I want to be sure that I am on the right track. Is it ok to re-use the powder of any material such, ZnO-NPS, MgO...etc that has been irradiated by X-ray beam to produce a...
03 March 2019 7,694 6 View
Dear respected RG members, Recently, we tried to prepare Ni doped MgO nanoparticles using co-precipitation method. The XRD pattern of pure MgO-NPs is going well with five peaks (20-80 degree). We...
01 January 2019 6,800 8 View
I bought few grams of sodium sulfide hydrate (Na2S.xH2O + aq.) with a molecular weight of 78.04 + aq. and assay as (Na2S) of 55-58% as source of sulfur to prepare CdS. I am trying to follow...
11 November 2018 2,808 2 View
Dear RG members, I read in literature that 2theta peaks of doped oxide may shift to lower or higher angles as the doping concentration increase due to the ionic differences between cations of the...
07 July 2018 4,241 5 View
Dear respected RG members, I am doing Mulliken population analysis of Cobalt (Co) doped MgO lattice (rocksalt) using CASTEP code (ultrasoft pseudopotential). I found some strange data as...
06 June 2018 8,309 8 View
Dear Respected Members, I did many tests to construct antiferromagnetic (AFM) ordering, which seems so hard to achieve. I build supercell of 2x2x1 containing 32 atoms of Mg16O16, and then replace...
04 April 2018 6,300 2 View
Dear Experts, I believe that there is no "arbitrary" things in science. Everything must be selected precisely with knowledge. I am trying to study the ferromagnetism in MgO rocksalt by...
03 March 2018 9,580 5 View
Dear Experts, I am trying to get information about stacking fault and dislocation based on TEM image. In the attached figure, I process the image using FFT implemented in digital micrograph DM....
02 February 2018 562 7 View
Dear Iraqi researchers, I hope we can establish a group of active researchers to dedicate our efforts to study and understand the behavior of materials using the following softwares: 1- highScore...
10 October 2017 10,062 1 View
dear experts, in the attachment you will find pictures of two materials powder. first picture is wollastonite, where most of the peaks have a V shape in the tip and also the noise of background...
07 July 2017 2,996 8 View
I have a ceramic material with a cylindrical shape sintered at high Temp. , I am trying to minimize the preferred orientation of this specimen during x-ray diffraction. unfortunately, we do not...
06 June 2017 9,930 3 View
I am trying to measure the dislocation density of a material with Triclinic crystal system. best regards
03 March 2017 3,666 0 View
Dear researchers, I have a powder sample with needle shape particles, and I faced some problem with the Preferred Orientation of the particle. which may cause problems when measuring the...
03 March 2017 2,711 4 View
I have mineral wollastonite within average particle size of D50 = 3 micrometer, I am trying to decrease the particle size to nano scale, using a planetary ball milling, I hope I can understand the...
01 January 2017 1,915 24 View
I am looking for coupling agent that give a good dispersion of the filler in polymeric matrix and a good bonding strength between the filler and the matrix
12 December 2016 5,964 3 View
I am trying to study a composite material, the substrate made of concrete (cubic) with a thin coated layer (polymeric material), can I model this composite material, to study some properties, such...
11 November 2016 3,276 7 View
I like to know if I can use rare earth oxides as a coating for pipes to prevent corrosion
09 September 2014 9,791 9 View
Dear scientist, I would like to know the most recent studied ceramic materials and their applications. I am looking for your suggestions and your thoughts about ceramics topis,applications and...
09 September 2014 8,434 3 View
I would like to synthesize acicular wollastonite by solid state method, please if you have suggestions about using this method and how I can use it, and if there is any kind of mineralizer that...
09 September 2014 3,630 3 View
