Manufacturing of Platinum Black Powder
Platinum black powder can be manufactured from ammonium chloroplatinate by heating at 500 °C in molten sodium nitrate for 30 minutes, followed by pouring the melt into water, boiling, washing, and reduction of the brown powder (believed to be platinum dioxide) with gaseous hydrogen to platinum black.
Read more about this topic: Platinum Black
Famous quotes containing the words platinum, black and/or powder:
“Flouncing your skirts, you blueness of joy, you flirt of
politeness,
You leap, you intelligence, essence of wheelness with silvery nose,
And your platinum clocks of excitement stir like the hairs of a
fern.”
—Karl Shapiro (b. 1913)
“Our inherent human charity and our religious beliefs will be taxed to the limit. No poor, rural, weak, or black person should ever have to bear the additional burden of being deprived of the opportunity of an education, a job, or simple justice.”
—Jimmy Carter (James Earl Carter, Jr.)
“Despite my asbestos gloves,
the cough is filling me with black,
and a red powder seeps through my veins....”
—Anne Sexton (1928–1974)