公开(公告)号：US3798490A

公开(公告)日：1974-03-19

申请号：US3798490D

申请日：1972-09-01

Applicant: GEN ELECTRIC

Inventor： ACKERMAN S ,  DUNHAM T

IPC: C22C27/04 ,  H01K1/04 ,  H01K1/08 ,  H01J1/05 ,  H01J1/14 ,  H01J1/38 ,  H01J1/48 ,  H01J19/06

CPC classification number: H01K1/04

Abstract: An incandescent lamp having a filament made of tungsten wire containing between 1-2 percent by weight thoria has greatly improved resistance to fracture caused by shock and vibration thereby increasing the service life of the lamp. The thoriated tungsten filament has a recrystallized grain structure which is characterized by approximately equiaxed crystals of tungsten of a smaller and more uniform size and thoria particles which are more uniformly distributed throughout the tungsten matrix than can be obtained by conventional powder metallurgy.

Abstract translation: 具有含有1-2重量％的钍的钨丝制成的灯丝的白炽灯大大改善了由冲击和振动引起的断裂耐受性，从而增加了灯的使用寿命。 钍钨丝具有再结晶晶粒结构，其特征在于具有更小和更均匀尺寸的钨的近似等轴晶体和比通过常规粉末冶金可获得的更均匀分布在钨基体上的氧化钍颗粒。