cerium dioxide造句

• This means that when heated to high temperatures, it does not melt, but merely glows with an intense blue light; addition of cerium dioxide gives a bright white light.
• Carl Auer von Welsbach's first company established a factory in Atzgersdorf in 1887, but it failed in 1889 . In 1890 he discovered that thorium was superior to magnesium and in 1891 he perfected a new mixture of 99 % thorium dioxide and 1 % cerium dioxide that gave off a much whiter light and produced a stronger mantle.
• *" This means that when heated to high temperatures, it does not melt, but merely glows with an intense blue light " why ? surely I thought I knew why ( though a quick explanation in a note would not hurt, as many people are not aware of colors of hot beyond red, yellow, and white ), but how does addition of cerium dioxide change that?