Polycrystalline sintered bismuth silicate - useful in x=ray displays, giving large visible zones

摘要

Polycrystalline Bi silicate (I) obtd. by sintering is a new material approximating to the formula Bi12SiO20, consisting of cubic microcrystals with dimensions between 2 and 6 micron of the formula Bi12Si1-epsilon O20 (in which epsilon is between 0 and 0.1). (I) is specified for use in equipment for the determn. of radiation (esp. X-rays). It can be made into pts. with large dimensions, e.g. plates or discs, which have good sensitivity and give large visible zones on exposure to X-rays.