Friday, 18 September 2009
About Gold and Electronics
This is what one of my friend told me about gold, he know hoe gold is used in electronics
The concentration of free electrons in gold metal is 5.90×1022 cm−3.
Gold is highly conductive to electricity, and has been used for electrical wiring in some high energy applications (silver is even more conductive per volume, but gold has the advantage of corrosion resistance). For example, gold electrical wires were used during some of the Manhattan Project's atomic experiments, but large high current silver wires were used in the calutron isotope separator magnets in the project.
Though gold is attacked by free chlorine, its good conductivity and general resistance to oxidation and corrosion in other environments (including resistance to non-chlorinated acids) has led to its widespread industrial use in the electronic era as a thin layer coating electrical connectors of all kinds, thereby ensuring good connection
Wednesday, 16 September 2009
About Gold And The Gold Industry
How much do we know about the gold industry.
Gold solder is used for joining the components of gold jewelry by high-temperature hard soldering or brazing.
If the work is to be of hallmarking quality, gold solder must match the carat weight of the work, and alloy formulas are manufactured in most industry-standard carat weights to color match yellow and white gold.
Gold solder is usually made in at least three melting-point ranges referred to as Easy, Medium and Hard. By using the hard, high-melting point solder first, followed by solders with progressively lower melting points, goldsmiths can assemble complex items with several separate soldered joints.
Gold can be made into thread and used in embroidery.
Gold is ductile and malleable, meaning it can be drawn into very thin wire and can be beaten into very thin sheets known as gold leaf.
Gold solder is used for joining the components of gold jewelry by high-temperature hard soldering or brazing.
If the work is to be of hallmarking quality, gold solder must match the carat weight of the work, and alloy formulas are manufactured in most industry-standard carat weights to color match yellow and white gold.
Gold solder is usually made in at least three melting-point ranges referred to as Easy, Medium and Hard. By using the hard, high-melting point solder first, followed by solders with progressively lower melting points, goldsmiths can assemble complex items with several separate soldered joints.
Gold can be made into thread and used in embroidery.
Gold is ductile and malleable, meaning it can be drawn into very thin wire and can be beaten into very thin sheets known as gold leaf.
Monday, 14 September 2009
About Gold and Its Uses
here's someting else about gold...
Gold can be used in food and has the E Number 175.
Gold leaf, flake or dust is used on and in some gourmet foods, notably sweets and drinks as decorative ingredient.
Gold flake was used by the nobility in Medieval Europe as a decoration in food and drinks, in the form of leaf, flakes or dust, either to demonstrate the host's wealth or in the belief that something that valuable and rare must be beneficial for one's health.
Goldwasser (English: Goldwater) is a traditional herbal liqueur produced in Gdańsk, Poland, and Schwabach, Germany, and contains flakes of gold leaf.
There are also some expensive (~$1000) cocktails which contain flakes of gold leaf. However, since metallic gold is inert to all body chemistry, it adds no taste nor has it any other nutritional effect and leaves the body unaltered.
Gold can be used in food and has the E Number 175.
Gold leaf, flake or dust is used on and in some gourmet foods, notably sweets and drinks as decorative ingredient.
Gold flake was used by the nobility in Medieval Europe as a decoration in food and drinks, in the form of leaf, flakes or dust, either to demonstrate the host's wealth or in the belief that something that valuable and rare must be beneficial for one's health.
Goldwasser (English: Goldwater) is a traditional herbal liqueur produced in Gdańsk, Poland, and Schwabach, Germany, and contains flakes of gold leaf.
There are also some expensive (~$1000) cocktails which contain flakes of gold leaf. However, since metallic gold is inert to all body chemistry, it adds no taste nor has it any other nutritional effect and leaves the body unaltered.
Saturday, 12 September 2009
About Gold As a Medicine
Did you know this about gold? did you know that it can be used as a medicine!
In medieval times, gold was often seen as beneficial for the health, in the belief that something that rare and beautiful could not be anything but healthy.
Even some modern esotericists and forms of alternative medicine assign metallic gold a healing power. Some gold salts do have anti-inflammatory properties and are used as pharmaceuticals in the treatment of arthritis and other similar conditions.
However, only salts and radioisotopes of gold are of pharmacological value, as elemental (metallic) gold is inert to all chemicals it encounters inside the body.
In modern times injectable gold has been proven to help to reduce the pain and swelling of rheumatoid arthritis and tuberculosis.
Dentistry. Gold alloys are used in restorative dentistry, especially in tooth restorations, such as crowns and permanent bridges. The gold alloys' slight malleability facilitates the creation of a superior molar mating surface with other teeth and produces results that are generally more satisfactory than those produced by the creation of porcelain crowns.
The use of gold crowns in more prominent teeth such as incisors is favored in some cultures and discouraged in others.
In medieval times, gold was often seen as beneficial for the health, in the belief that something that rare and beautiful could not be anything but healthy.
Even some modern esotericists and forms of alternative medicine assign metallic gold a healing power. Some gold salts do have anti-inflammatory properties and are used as pharmaceuticals in the treatment of arthritis and other similar conditions.
However, only salts and radioisotopes of gold are of pharmacological value, as elemental (metallic) gold is inert to all chemicals it encounters inside the body.
In modern times injectable gold has been proven to help to reduce the pain and swelling of rheumatoid arthritis and tuberculosis.
Dentistry. Gold alloys are used in restorative dentistry, especially in tooth restorations, such as crowns and permanent bridges. The gold alloys' slight malleability facilitates the creation of a superior molar mating surface with other teeth and produces results that are generally more satisfactory than those produced by the creation of porcelain crowns.
The use of gold crowns in more prominent teeth such as incisors is favored in some cultures and discouraged in others.
Thursday, 10 September 2009
About Gold As Jewellery
This is what we all know about gold.... it can be used as gold jewelry.
Because of the softness of pure (24k) gold, it is usually alloyed with base metals for use in jewelry, altering its hardness and ductility, melting point, color and other properties.
Alloys with lower caratage, typically 22k, 18k, 14k or 10k, contain higher percentages of copper, or other base metals or silver or palladium in the alloy.
Copper is the most commonly used base metal, yielding a redder color. Eighteen carat gold containing 25% copper is found in antique and Russian jewelry and has a distinct, though not dominant, copper cast, creating rose gold.
Fourteen carat gold-copper alloy is nearly identical in color to certain bronze alloys, and both may be used to produce police, as well as other, badges. Blue gold can be made by alloying with iron and purple gold can be made by alloying with aluminium, although rarely done except in specialized jewelry. Blue gold is more brittle and therefore more difficult to work with when making jewelry
Because of the softness of pure (24k) gold, it is usually alloyed with base metals for use in jewelry, altering its hardness and ductility, melting point, color and other properties.
Alloys with lower caratage, typically 22k, 18k, 14k or 10k, contain higher percentages of copper, or other base metals or silver or palladium in the alloy.
Copper is the most commonly used base metal, yielding a redder color. Eighteen carat gold containing 25% copper is found in antique and Russian jewelry and has a distinct, though not dominant, copper cast, creating rose gold.
Fourteen carat gold-copper alloy is nearly identical in color to certain bronze alloys, and both may be used to produce police, as well as other, badges. Blue gold can be made by alloying with iron and purple gold can be made by alloying with aluminium, although rarely done except in specialized jewelry. Blue gold is more brittle and therefore more difficult to work with when making jewelry
Tuesday, 8 September 2009
About Gold Applications - As the Metal
Heres some info I found online about gold..
In various countries, gold was used as a standard for monetary exchange, but this practice has been abandoned with the rise of fiat currency. The last country to back their money with gold was Switzerland, which backed 40% of its value until it joined the International Monetary Fund in 1999. [6] Pure gold is too soft for ordinary use and is typically hardened by alloying with copper or other base metals. The gold content of gold alloys is measured in carats (k), pure gold being designated as 24k.
Gold coins intended for circulation from 1526 into the 1930s were typically a standard 22k alloy called crown gold, for hardness. Modern collector/investment bullion coins (which do not require good mechanical wear properties) are typically 24k, although the American Gold Eagle, the British gold sovereign and the South African Krugerrand continue to be made at 22k, on historical tradition.
In various countries, gold was used as a standard for monetary exchange, but this practice has been abandoned with the rise of fiat currency. The last country to back their money with gold was Switzerland, which backed 40% of its value until it joined the International Monetary Fund in 1999. [6] Pure gold is too soft for ordinary use and is typically hardened by alloying with copper or other base metals. The gold content of gold alloys is measured in carats (k), pure gold being designated as 24k.
Gold coins intended for circulation from 1526 into the 1930s were typically a standard 22k alloy called crown gold, for hardness. Modern collector/investment bullion coins (which do not require good mechanical wear properties) are typically 24k, although the American Gold Eagle, the British gold sovereign and the South African Krugerrand continue to be made at 22k, on historical tradition.
Sunday, 6 September 2009
About Gold and Applications
What do we know about gold...
Its the medium of monetary exchange
Also has many applications
As the metal
Jewelry
Medicine
Food and drink
Industry
Electronics
Other
As gold chemical compounds
Its the medium of monetary exchange
Also has many applications
As the metal
Jewelry
Medicine
Food and drink
Industry
Electronics
Other
As gold chemical compounds
Friday, 4 September 2009
About Gold and Gold Education
At the end of 2006, it was estimated that all the gold ever mined totaled 158,000 tonnes. [1]
This can be represented by a cube with an edge length of just 20.2 meters.
Modern industrial uses include dentistry and electronic, where gold has traditionally found use because of its good resistance to oxidative corrosion and excellent quality as a conductor of electricity.
Chemically, gold is a transition metal and can form trivalent and univalent cations upon solvation.
At STP it is attacked by aqua regia (a mixture of acids), forming chloroauric acid and by alkaline solutions of cyanide but not by single acids such as hydrochloric, nitric or sulfuric acids. Gold dissolves in mercury, forming amalgam alloys, but does not react with it. Since gold is insoluble in nitric acid which will dissolve silver and base metals, this is exploited as the basis of the gold refining technique known as "inquartation and parting". Nitric acid has long been used to confirm the presence of gold in items, and this is the origin of the colloquial term "acid test", referring to a gold standard test for genuine value.
This can be represented by a cube with an edge length of just 20.2 meters.
Modern industrial uses include dentistry and electronic, where gold has traditionally found use because of its good resistance to oxidative corrosion and excellent quality as a conductor of electricity.
Chemically, gold is a transition metal and can form trivalent and univalent cations upon solvation.
At STP it is attacked by aqua regia (a mixture of acids), forming chloroauric acid and by alkaline solutions of cyanide but not by single acids such as hydrochloric, nitric or sulfuric acids. Gold dissolves in mercury, forming amalgam alloys, but does not react with it. Since gold is insoluble in nitric acid which will dissolve silver and base metals, this is exploited as the basis of the gold refining technique known as "inquartation and parting". Nitric acid has long been used to confirm the presence of gold in items, and this is the origin of the colloquial term "acid test", referring to a gold standard test for genuine value.
Wednesday, 2 September 2009
What Do You Know About Gold
Do you know a lot about gold even though you have gold items...
Gold is a very soft metal when it is pure (24 Kt. is pure gold). Gold is the most malleable (hammerable) and ductile (able to be made into wire) metal. Gold is usually alloyed (mixed with other metals, often silver and ...A tiny piece of metal is scraped from gold.
Gold is a chemical element with the symbol Au (Latin: aurum) and an atomic number of 79.
It has been a highly sought-after precious metal in jewelry, in sculpture, and for ornamentation since the beginning of recorded history
Gold is a very soft metal when it is pure (24 Kt. is pure gold). Gold is the most malleable (hammerable) and ductile (able to be made into wire) metal. Gold is usually alloyed (mixed with other metals, often silver and ...A tiny piece of metal is scraped from gold.
Gold is a chemical element with the symbol Au (Latin: aurum) and an atomic number of 79.
It has been a highly sought-after precious metal in jewelry, in sculpture, and for ornamentation since the beginning of recorded history
Monday, 31 August 2009
About Gold And Its Characteristics
A gold nugget
Here's somethings about gold. Gold, also called golden, is an orange-yellow color which is a representation of the color of the element gold.
The web color gold (also referred to as orange-yellow) is sometimes referred to as golden in order to distinguish it from the color metallic gold. The use of gold as a color term in traditional usage is more often applied to the color "metallic gold" (shown below).
Saturday, 29 August 2009
About Gold
Its About Gold - Wikipedia, the free encyclopediaGold (pronounced /'go?ld/) is a chemical element with the symbol Au (Latin: aurum) and an atomic number of 79. It ...Gold is dense, soft, shiny and the most malleable and ductile pure metal known. Pure gold has a bright yellow color and luster traditionally considered attractive, which ...The color of pure gold is metallic yellow. Gold, caesium and copper are the only metallic elements with a natural color other than gray or white.
Thursday, 27 August 2009
Welcome to the About Gold
Welcome to the About Gold site!
This blog will help you to learn all the tips and tricks About Gold.
This blog will help you to learn all the tips and tricks About Gold.
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