Used as a semiconductor in rectifiers and suppressors for many years, selenium occurs naturally on the earth. Its popularity as a rectifier is fading in favor of its silicon equivalent. Rajendranath K ...

Converting ac to dc has been accomplished by several different types of rectifiers through the years. Here are a few of the more common types of rectifiers used in the past 100 years. Mercury arc ...

CRYSTAL rectifiers, the essential constituents of which are a metal and semiconductor in contact, are of two types, large-area contact rectifiers, such as copper oxide or selenium rectifiers, and ...

IN a paper entitled “Contact Non-Linearity, with reference to the Metal Rectifier and the Carborundum Ceramic Non-Linear Resistor” (j. Inst. Elec. Eng., 89, Pt. 1, No. 23 ; November 1942), A.