Synthesis and Applications of Lanthanide Sulfides and Oxides
Solid State Synthesis of Mixed Metal Oxides
1
5 th Summary-Introduction to Solid State Synthesis of Mixed Metal Oxide, Dr. Dr. Lukasz Koscielski – Dept. of Chemistry UPR -Cayey In the workshop we dealt with synthesising what are known as mixed-metal oxides, these are basically metal compounds with oxygen that reacts intrinsically with them. We obtained these compounds in powder form in order to weight their mass and heat at extremely high temperatures until observing physical & chemical property changes. The main properties Dr. Koscielski and his RA’s along with us looked for were crystal structures, space group and other physical characterization. The samples I chose were 1 Pb: 3 Sb whose oxidation states vary +2 and +4 in Pb, and +3, +5 in Sb, afterwards a chemical mathematical conversion took place and we determined the least amount of compound milligrams to use in order to decrease the size of our ecological footprint from these highly reactive metals. We then took silica tubes and carbon coated them, a process in which we input acetone and then dispose of it, afterwards putting it to the blue flame in order to create a layer which will inhibit light from reacting with our compounds and the same compounds from reacting with the tube. After this process has been done the most cautious way possible we place the reactions in temperatures over 1,273 K until the compound reacts with the elements composing it. The conclusions of this workshop were not so rewarding, but after talking with Dr.Koscielski he mentioned to me that he had to do over a 1,000 reactions in order to obtain a scarce amount of crystals. These highly acclaimed magnetism, optical, and even electronic properties could be derived to develop the next-gen of “superconductors”.
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Transcript of Solid State Synthesis of Mixed Metal Oxides
5th Summary-Introduction to Solid State Synthesis of Mixed Metal Oxide, Dr. Dr. Lukasz Koscielski – Dept. of Chemistry UPR -CayeyIn the workshop we dealt with synthesising what are known as mixed-metal oxides, these are basically
metal compounds with oxygen that reacts intrinsically with them. We obtained these compounds in
powder form in order to weight their mass and heat at extremely high temperatures until observing
physical & chemical property changes. The main properties Dr. Koscielski and his RA’s along with us
looked for were crystal structures, space group and other physical characterization. The samples I chose
were 1 Pb: 3 Sb whose oxidation states vary +2 and +4 in Pb, and +3, +5 in Sb, afterwards a chemical
mathematical conversion took place and we determined the least amount of compound milligrams to use
in order to decrease the size of our ecological footprint from these highly reactive metals. We then took
silica tubes and carbon coated them, a process in which we input acetone and then dispose of it,
afterwards putting it to the blue flame in order to create a layer which will inhibit light from reacting with
our compounds and the same compounds from reacting with the tube. After this process has been done
the most cautious way possible we place the reactions in temperatures over 1,273 K until the compound
reacts with the elements composing it. The conclusions of this workshop were not so rewarding, but after
talking with Dr.Koscielski he mentioned to me that he had to do over a 1,000 reactions in order to obtain a
scarce amount of crystals. These highly acclaimed magnetism, optical, and even electronic properties
could be derived to develop the next-gen of “superconductors”.
