公开(公告)号：US20210087116A1

公开(公告)日：2021-03-25

申请号：US16633926

申请日：2018-07-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Craig W. Lindsay ,  Susannah C. Clear ,  Kenton D. Budd ,  Mahmut Aksit ,  Thomas P. Hedblom

IPC: C04B35/48 ,  C04B35/624 ,  C04B35/64 ,  E01F9/524

Abstract: Plurality of nanocrystalline percent by volume crystalline ceramic oxide beads, wherein the nanocrystalline ceramic oxide beads have an average crystallite size up to 250 nm, wherein each bead collectively comprises, on a theoretical oxides basis, at least one of Al2O3, SiO2, TiO2, or ZrO2 at least 40 weight percent, and at least 1 weight percent of at least one of a transition metal oxide or at least one Bi2O3 or CeO2, based on the total weight of the nanocrystalline ceramic oxide beads, and are visibly dark and infrared transmissive. The beads are useful, for example, in pavement markings.