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Tempered or toughened glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering puts the outer surfaces into compression and the interior into tension .
Also unlike toughened glass, chemically strengthened glass may be cut after strengthening, but loses its added strength within approximately 20 mm of the cut. Similarly, when the surface of chemically strengthened glass is deeply scratched, this area loses its additional strength. Another negative of chemically strengthened glass is the added cost.
Toughened glass is processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. [6] Tempering, by design, creates balanced internal stresses which causes the glass sheet, when broken, to crumble into small granular chunks of similar size and shape instead of splintering into random, jagged shards.
Nigeria is a federal republic in West Africa, bordering Benin in the west, Chad and Cameroon in the east, and Niger in the north. As of 2015 Nigeria has the world's 20th largest economy, worth more than $500 billion and $1 trillion in terms of nominal GDP and purchasing power parity respectively. It overtook South Africa to become Africa's ...
Nigeria National Petroleum: Oil and gas 9,706 1,877 2 Nigeria Liquefied Natural Gas: Oil and gas 6,315 ... 3 MTN Nigeria: Telecommunications 3,514 536 4 Dangote Cement: Cement 2,699 721 5 Nigerian Petroleum Development: Oil and gas 2,686 219 6 Flour Mills of Nigeria: Agroindustry 2,014 67 7 Airtel Nigeria: Telecommunications 1,503 343 8 ...
Float glass is a sheet of glass made by floating molten glass on a bed of molten metal of a low melting point, typically tin, [1] although lead was used for the process in the past. [2] This method gives the sheet uniform thickness and a very flat surface. [ 3 ]
The Nigerian Stock Exchange (NSE), now Nigerian Exchange Group, is an integrated stock exchange group in Africa founded in 1961 in Lagos.Following the demutualization of the NSE in 2021, NGX Group now has 3 subsidiaries - Nigerian Exchange Limited (NGX), the operating exchange; NGX Regulation (NGX RegCo, the independent regulation company; and NGX Real Estate (NGX RelCo).
Gorilla Glass DX+ was first used on the Samsung Galaxy Watch. [51] Gorilla Glass 3+ was introduced in August 2019. [52] It was designed for intermediate and value-segment mobile devices, and its drop performance bridges the gap between Gorilla Glass 3 and Gorilla Glass 5 in this market segment. [52] Gorilla Glass Victus was introduced in July ...