Patent ID: 11912054
Assignee: SUMITOMO METAL MINING CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  G  H | IPC B

Claim 5:
6. A light to heat conversion layer, comprising infrared absorbing particles and a binder component;
wherein the infrared absorbing particles are composite tungsten oxide fine particles including a hexagonal crystal structure,
the composite tungsten oxide fine particles are represented by general formula MxWyOz in which M is one or more elements selected from alkali metals, W is tungsten, O is oxygen, and x, y, and z satisfy 0.001≤x/y≤1 and 2.0≤z/y≤3.0,
a lattice constant of the composite tungsten oxide fine particles is such that a-axis is 7.3850 Å or more and 7.4186 Å or less, and c-axis is 7.5600 Å or more and 7.6240 Å or less,
a particle size of the composite tungsten oxide fine particles is 10 nm or more and 100 nm or less,
a crystallite size of the composite tungsten oxide fine particles is 10 nm or more and 100 nm or less, and
at least a part of a surface of the composite tungsten oxide fine particles is covered with a surface covering layer containing one or more elements selected from the group consisting of Si, Ti, Zr, and Al.