Copper Hydroxide
Copper Hydrate, Cupric Hydroxide, Cu(OH)2
Chemistry
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Volatiles
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Significant Temperatures
- 1050C: 6.5% is lost, likely involving partial loss of oxygen to form a mix of cuprous and cupric oxides
- 185C: Loses about 18% weight as it decomposes to the heat stable CuO
Links to Other Materials
- Copper Carbonate - Related
- Copper Carbonate Basic - Related
- Cache
Miscellaneous
- Family: Colorant
- Region: None
- Mined At: Unspecified
- Raw Mineral: No
- Generic: Yes
Notes
CAS 20427-59-2
This is less reactive than copper carbonate basic and more reactive than cupric oxide (CuO). This material does not contribute to CO2 bubbling in glazes.
In this material, one atom of Cu bonds to two OH (thus Cu(OH)2), whereas in copper carbonate basic two atoms of Cu share a CO3 and each bonds an OH (thus CuCO3 . Cu(OH)2).
Copper Hydroxide has a fairly complex decomposition as it is heated to melting point. Around 185C it loses about 18% weight as it decomposes to the heat stable CuO (cupric oxide) which remains stable until 1000C. Around 1050C about 6.5% is lost, likely involving partial loss of oxygen to form a mix of cuprous and cupric oxides.
Please check the accompanying curve to see the history of weight loss as this is fired (courtesty of Bob Hickerson, World Metal, LLC). You can see how much weight it lost, where it occurs and how fast it happens. Compare this with Copper Carbonate Basic to see the difference.
Data
- TGA: See accompanying chart picture
Suppliers
- World Metal, LLC
Authors
- Tony Hansen (Owner)
Pictures
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Copper
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Copper In Calcite
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Copper Phosphate2
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TGA/DTA curve showing weight loss over temperature range
XML
<?xml version="1.0" encoding="UTF-8"?>
<material name="Copper Hydroxide" descrip="Copper Hydrate, Cupric Hydroxide, Cu(OH)2" generic="1" rawmineral="0" searchkey="" loi="0.00">
<families>
<family name="Colorant"/>
</families>
<oxides>
<oxide symbol="CuO" name="Cupric Oxide" status="" percent="81.530" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="" name="" percent="18.460" tolerance=""/>
</volatiles>
<references>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
</references>
<temperatures>
<temperature temperature="1050C" notes="6.5% is lost, likely involving partial loss of oxygen to form a mix of cuprous and cupric oxides"/>
<temperature temperature="185C" notes="Loses about 18% weight as it decomposes to the heat stable CuO "/>
</temperatures>
<suppliers>
<supplier name="World Metal, LLC" country="" url="www.worldmetalllc.com" label="USA Dealer"/>
</suppliers>
<notes>
<note>CAS 20427-59-2
This is less reactive than copper carbonate basic and more reactive than cupric oxide (CuO). This material does not contribute to CO2 bubbling in glazes.
In this material, one atom of Cu bonds to two OH (thus Cu(OH)2), whereas in copper carbonate basic two atoms of Cu share a CO3 and each bonds an OH (thus CuCO3 . Cu(OH)2).
Copper Hydroxide has a fairly complex decomposition as it is heated to melting point. Around 185C it loses about 18% weight as it decomposes to the heat stable CuO (cupric oxide) which remains stable until 1000C. Around 1050C about 6.5% is lost, likely involving partial loss of oxygen to form a mix of cuprous and cupric oxides.
Please check the accompanying curve to see the history of weight loss as this is fired (courtesty of Bob Hickerson, World Metal, LLC). You can see how much weight it lost, where it occurs and how fast it happens. Compare this with Copper Carbonate Basic to see the difference.</note>
</notes>
<testdata>
<testitem testname="2" value="See accompanying chart picture"/>
</testdata>
<pictures>
<picture description="Copper" filename="copper.jpg"/>
<picture description="Copper In Calcite" filename="copper_in_calcite.jpg"/>
<picture description="Copper Phosphate2" filename="copper_phosphate2.jpg"/>
<picture description="TGA/DTA curve showing weight loss over temperature range" filename="tga-copper.gif"/>
</pictures>
</material>
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