A coating including a plurality of indicator oxide nanoparticles, a binder, and a wetting agent. A sulfidation corrosion mitigation coating including: a sulfidation corrosion mitigation material, a binder, and a plurality of indicator oxide nanoparticles. An article including a metal alloy substrate having the sulfidation corrosion mitigation coating thereon is also provided. The sulfidation corrosion mitigation coating can include a first indicator layer containing indicator oxide nanoparticles disposed on the surface of the metal alloy substrate. Methods for inspection of an article having a coating containing a plurality of indicator oxide nanoparticles is also provided.

A coating including a plurality of indicator oxide nanoparticles, a binder, and a wetting agent. A sulfidation corrosion mitigation coating including: a sulfidation corrosion mitigation material, a binder, and a plurality of indicator oxide nanoparticles. An article including a metal alloy substrate having the sulfidation corrosion mitigation coating thereon is also provided. The sulfidation corrosion mitigation coating can include a first indicator layer containing indicator oxide nanoparticles disposed on the surface of the metal alloy substrate. Methods for inspection of an article having a coating containing a plurality of indicator oxide nanoparticles is also provided.

A wavelength conversion member includes a substrate having light reflectivity, and a phosphor layer disposed on the substrate and including phosphor particles, oxide particles adhering to the phosphor particles, and a covering film containing silicon oxide and covering the phosphor particles and the oxide particles. A material of the oxide particles differs from a material of the covering film, and an extinction coefficient of the covering film is less than 1.010.sup.5.

Disclosed is an Er.sup.3+ doped Lu.sub.4Zr.sub.3O.sub.12 functional nanocrystal glass ceramic and a method of preparing the same. The glass ceramic comprises components in mole percentages of: 57% to 59% of SiO.sub.2, 12% to 16% of Al.sub.2O.sub.3, 14% to 18% of ZnO, 6% to 8% of Li.sub.2O, 3% to 5% of ZrO.sub.2, 2% to 3% of Lu.sub.2O.sub.3, 0.05% to 0.2 of Er.sub.2O.sub.3. Through composition design and heat treatment process control, the present invention achieves the controllable preparation of Er.sup.3+ rare-earth ion-doped Lu.sub.4Zr.sub.3O.sub.12 functional nanocrystals within the glass. This functional nanocrystalline glass has potential application value in low-temperature optical thermometry.