| 释义 |
ˌpyro-eˈlectric, a. Min.
Also pyroelectric.
[pyro- 1.]
Applied to certain crystals which on being heated become electrically polar, i.e. exhibit positive and negative electricity at opposite ends (the effects being reversed while cooling). Also applied to the effect exhibited by such crystals and to devices employing it. Hence ˌpyro-elecˈtricity, the property of being pyro-electric.
1834in Encycl. Brit. VIII. 595/1 Pyro-electricity. 1853Pharm. Jrnl. XIII. 112 The crystals..are..pyroelectric. 1864–72Watts Dict. Chem. II. 411 In Crystals:—Pyro-electricity. 1871B. Stewart Heat §167 Haüy was the first to remark that those crystals are pyroelectric which are deficient in symmetry. 1895[see pyritoid]. 1899O. Lodge Mod. Views Electr. §63 (heading) Pyro-electricity. 1902H. A. Miers Mineralogy 480 The pyro-electric property [of tourmaline], which was first observed at the beginning of the eighteenth century,..can be very easily shown by means of Kundt's dusting method. 1922Glazebrook Dict. Appl. Physics II. 598/1 The existence of a true pyro-electric effect has been questioned by several investigators. 1973Physics Bull. Mar. 161/2 The flame monitor uses two telescopes, each containing either a photoelectric or pyroelectric cell, to pinpoint and monitor a particular flame. 1979‘R. Cassilis’ Arrow of God iii. v. 60 Beneath a layer of Wordsworth we packed..half a dozen pyroelectric-vidicon cameras. |