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持久带电的半导体把一种不导电的物体——电介质,放到带电体附近,就能够被感应带电:靠近带电体的一端带上与带电体相反的电,另一端带上与带电体相同的电。可是等把带电体拿开以后,这种带电体就马上“失去”电了。然而有这么一种半导体,它在感应带电以后,虽然把带电体拿开,仍然保持带屯。这种半导体有个古怪的名字,叫做“铁电体”。这个名字是怎么起的呢?原来,铁电体的电极化,就像铁磁物质(如铁、镍、钴和它们的合金等)的磁化一般。可以认力,铁磁物质和顺磁物质(如铝、铂
Long-lasting charged semiconductors can put a non-conducting object-dielectric in the vicinity of a charged body and can be inductively charged: the end near the charged body is charged with electricity opposite to the charged body, and the other end is charged with the same charge as the charged body. Electricity. However, when the charged body was removed, the charged body was immediately “lost”. However, there is such a semiconductor, which, after induction charging, keeps the electrified body away, but still maintains it. This semiconductor has a weird name called “ferroelectric.” How does this name start? It turns out that the electrical polarization of ferroelectrics is like the magnetization of ferromagnetic materials (such as iron, nickel, cobalt, and their alloys, etc.). Able to recognize ferromagnetic substances and paramagnetic substances (such as aluminum, platinum