Possess light storage Characteristic fluorescent property the mineral artificial ceramic granular product and its production manner

摘要

PROBLEM TO BE SOLVED: To advantageously produce inorg. artificial ceramics having superior mechanical strength, wear, water and weather resistance, etc., as well as superior light accumulating property and clear fluorescent characteristic. ;SOLUTION: Borosilicate glass consisting essentially of SiO₂, B₂O₃ and an alkali metal oxide is used as a base material and a light accumulating phosphor made of at least one kind of metallic aluminate represented by the formula MO-nAl₂O₃ (where M represents one metal or metal composite of more than two metals selected among Mg, Ca, Sr and Ba) is uniformly dispersed and incorporated into the base material by 3-50wt.% or the base material which is blended with the phosphor. Firing is then carried out at 750-900°C in an inert atmosphere or a slightly reductive atmosphere to obtain the objective inorg. artificial ceramics.;COPYRIGHT: (C)1998,JPO