|Monthly Tech-Tip |
Alternate Names: Ni2O3, Nickelic Oxide, Nickel sesquioxide, Nickel (III) oxide, Nickel Oxide
A powerful and refractory colorant that produces greys, blues, and yellows. It is more concentrated than nickel carbonate and as little as .02% gives a noticeable tint. Normal additions are 2-5%.
Typical grades are 75-77% nickel metal with trace elements (0.0001-0.01%) of cobalt, iron, copper, zinc, manganese, magnesium, calcium, sodium and sulfur and chloride volatiles. Particle sizes can be very fine, down to 5 microns (below 325 mesh). It is insoluble in water and soluble in acids
It can also soften and mute more intense colorants such as copper and cobalt.
It is refractory and can raise the melting temperature of glazes if used in large amounts.
Given its high surface area and chemical reactivity, high purity black nickel oxide can be used to react with acids to form nickel salts, which can then be converted into other nickel compounds. Examples include the production of nickel sulfamate for electroplating, or the production of nickel molybdate for hydrodesulfurization catalysts.
The oxide combines with other metal oxides to produce special color pigments. Uses also include glass frits for porcelain enamel and to develop colors in clear glass.
Nickel Oxide at Wikipedia
Nickel Oxide Hazards at ilo.org
|Oxides||NiO - Nickel Oxide|
Metallic based materials that impart fired color to glazes and bodies.
Generic materials are those with no brand name. Normally they are theoretical, the chemistry portrays what a specimen would be if it had no contamination. Generic materials are helpful in educational situations where students need to study material theory (later they graduate to dealing with real world materials). They are also helpful where the chemistry of an actual material is not known. Often the accuracy of calculations is sufficient using generic materials.
Nickel Compounds Toxicity
Nickel Oxide Green
Metal oxide powders are used in ceramics to produce color. But a life time is not enough to study the complexities of their use and potential in glazes, engobes, bodies and enamels.
|Frit Softening Point||1990C M|
|Density (Specific Gravity)||4.80|
|Surface Area (m2/gm)||60-80 m2/g|
|By Tony Hansen|
Follow me on