Ví dụ về việc sử dụng Lead oxide trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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For this purpose, the blocks are colored with an iron and lead oxide.
Only glass products containing at least 24% lead oxide may be referred to as"lead crystal".
This method will also work with lead carbonate or lead oxide.
The lead oxide used in lead glass could be obtained from a variety of sources.
The red pigment on the wrappings turned out to be lead oxide from Spanish mines.
Glasses with lead oxide content first appeared in Mesopotamia, the birthplace of the glass industry.
Originally, flint glass was a leaded glass, containing anywhere from 4-60% lead oxide.
The lead metal would be calcined to form lead oxide by roasting it and scraping off the litharge.
The clear yellow glass, measuring approximately 3 feet by 4 feet and weighing 1,500 pounds,contains 70 percent lead oxide.
In the European Union,only glass products containing at least 24% of lead oxide may be referred to as"lead crystal".
The addition of lead oxide to glass raises its refractive index and lowers its working temperature and viscosity.
A very important advance inglass manufacture was the technique of adding lead oxide to the molten glass;
Sulfide ores are roasted, producing primarily lead oxide and a mixture of sulfates and silicates of lead and other metals contained in the ore.[6].
The low viscosity of lead glassmelt is the reason for typically high lead oxide content in the glass solders.
These low values suggest that lead oxide may not have been consciously added, and was certainly not used as the primary fluxing agent in ancient glasses.
At first, his glasses tended to crizzle, developing a network of small cracks destroying its transparency,which was eventually overcome by replacing some of the potash flux with lead oxide to the melt, up to 30%.
Solid lead and lead oxide plates are submerged within an electrolytic solution that consists of a very small percentage of sulphuric acid(H2SO4) mixed with distilled water.
Red Lead is a kind of fresh organge red powder, its specific density is 9.1,it starts to disintegrade into Lead Oxide at 500, is insoluble in water and alcohol, soluble in nitric acid, partly soluble in glacial acetic acid, soluble in hot aqueous alkali.
Glasses with lead oxide content first appeared in Mesopotamia, the birthplace of the glass industry.[1] The earliest known example is a blue glass fragment from Nippur dated to 1400 BC containing 3.66% PbO.
Originally discovered by Englishman George Ravenscroft in 1674,the technique of adding lead oxide(in quantities of between 10 and 30%) improved the appearance of the glass and made it easier to melt using sea-coal as a furnace fuel.
Lead oxide added to the molten glass gives lead crystal a much higher index of refraction than normal glass, and consequently much greater“sparkle” by increasing specular reflection and the range of angles of total internal reflection.
Although pure lead is very reactive, lead compounds,such as lead oxide, can be very stable, making them suitable as ingredients in corrosion-resistant coating for iron and steel.
Lead oxide added to the molten glass gives lead crystal a much higher index of refraction than normal glass, and consequently much greater"sparkle" by increasing specular reflection and the range of angles of total internal reflection.
Originally discovered by Englishman George Ravenscroft in 1674,the technique of adding lead oxide(in quantities of between 10 and 30%) improved the appearance of the glass and made it easier to melt using sea-coal as a furnace fuel.
As the lead acid battery becomes discharged, the sulphuric acid forms deposits onto the lead plates, but when the lead acid battery is recharged again,the sulphuric acid breaks down and returns back into their separate lead and lead oxide components.
Originally discovered by Englishman George Ravenscroft in 1674,he found that by adding lead oxide(in quantities of between 10 and 30%) the result was an improved appearance of the glass, making it more brilliant and easier to work with.
Pyrolysis of the barium salt of azobenzoate oxidation of aniline with lead oxide oxidation of dihydrophenazine, which is prepared by heating pyrocatechin with o-phenylenediamine. oxidation of ortho-aminodiphenylamine with lead peroxide.
Originally discovered by Englishman George Ravenscroft in 1674,the technique of adding lead oxide(in quantities of between 10 and 30%) improved the appearance of the glass and made it easier to melt using sea-coal as a furnace fuel. This technique also increased the"working period" making the glass easier to manipulate.
Originally discovered by EnglishmanGeorge Ravenscroft in 1674,the technique of adding lead oxide(in quantities of between 10 and 30%) improved the appearance of the glass and made it easier to melt using sea-coal as a furnace fuel. This technique also increased"working period" making the glass easier to manipulate.