Manganin

a copper-based alloy with additives of manganese (11.5-13.5 percent) and nickel (2.5-3.5 percent), characterized by an extremely small change in resistivity within the range of ordinary temperatures. It was first introduced in Germany in 1889. Manganin has the following characteristics: specific resistance, 0.47 microhm .m at 20°C; temperature coefficient of electric resistance, 2 × 10^-6 1/°C at 15°-35°C (after special heat treatment—stabilizing annealing); melting point, 960°C.

Manganin is used in the manufacture of standard resistors and elements for measuring instruments. The chief advantage in using Manganin rather than Constantan is that Manganin has a very low thermoelectromotive force when coupled with copper (not more than 1 microvolt/°C); therefore, only Manganin is used for high-precision instruments. In addition, Manganin, unlike Constantan, is not corrosion-resistant in atmospheres containing acid and ammonia vapors; it is also sensitive to substantial changes in atmospheric humidity. Certain silverbased alloys with additives of manganese (up to 17 percent), tin (up to 7 percent), and other elements are classified as silver Manganins.

L. L. ZHUKOV

单词	manganin
释义	Manganin Manganin (ˈmæŋɡənɪn) n (Metallurgy) trademark an alloy of copper containing manganese (13–18 per cent) and nickel (1–4 per cent): it has a high electrical resistance that does not vary greatly with temperature and is used in resistors Translations Manganin Manganin a copper-based alloy with additives of manganese (11.5-13.5 percent) and nickel (2.5-3.5 percent), characterized by an extremely small change in resistivity within the range of ordinary temperatures. It was first introduced in Germany in 1889. Manganin has the following characteristics: specific resistance, 0.47 microhm .m at 20°C; temperature coefficient of electric resistance, 2 × 10^-6 1/°C at 15°-35°C (after special heat treatment—stabilizing annealing); melting point, 960°C. Manganin is used in the manufacture of standard resistors and elements for measuring instruments. The chief advantage in using Manganin rather than Constantan is that Manganin has a very low thermoelectromotive force when coupled with copper (not more than 1 microvolt/°C); therefore, only Manganin is used for high-precision instruments. In addition, Manganin, unlike Constantan, is not corrosion-resistant in atmospheres containing acid and ammonia vapors; it is also sensitive to substantial changes in atmospheric humidity. Certain silverbased alloys with additives of manganese (up to 17 percent), tin (up to 7 percent), and other elements are classified as silver Manganins. L. L. ZHUKOV
随便看	kelsey, henry kelsey park school association kelsey park sports college kelsey-seybold clinic kelsher kelsi kelsiev, vasilii kelsiev, vasilii ivanovich kelsinian jurisprudence kelso kelso high school kelso housing authority kelso-longview kelso-longview adventist school kelso longview television kelson kelsons kelso school district kelston boys high school kelston deaf education centre kelston intermediate school kelt kel tamajaq kel tamasheq kel-tec owners group