Abstract: Provided are use of a rare earth amino acid complex, a polylactic acid composition and a preparation method thereof. The rare earth amino acid complex is formed by complexing a rare earth metal ion with an amino acid; a rare earth element corresponding to the rare earth metal ion is one or more selected from the group consisting of lanthanum, cerium and samarium; and the amino acid is at least one selected from the group consisting of proline, L-phenylalanine, tyrosine and tryptophan.

Abstract: The present application provides a method for detecting temperature of thermal chamber comprising: conducting a thermal treatment at a predicted temperature to a selected silicon wafer within a thermal chamber, wherein the predicted temperature comprises plural temperature points set in order; obtaining a haze value corresponding to the predicted temperature; obtaining a linear relationship I between the temperature and the haze; polishing and washing the silicon wafer; conducting a thermal treatment at a predicted temperature to the polished silicon wafer within the thermal chamber; obtaining a linear relationship II between the temperature and the haze; calculating a difference of the haze at same temperature point between the two thermal treatments, and obtaining an actual temperature difference of the thermal chamber based on the difference of the haze.

Abstract: Provided are a high temperature and chloride corrosion resistant NiCrTiAlSi/La2O3 coating at a flue gas side of a waste incineration power generating boiler and a preparation method thereof. The method comprises the following steps: (1) preparing a composite powder; (2) uniformly grinding the composite powder to obtain a spherical composite powder, then drying the spherical composite powder; (3) cleaning and roughening a surface of a substrate; (4) using a thermal spraying technique to spray a primer layer on a heating surface; (5) using a thermal spraying technique to spray the spherical composite powder onto the primer layer; and (6) cooling. The coating obtained by the method comprises a composite coating spray-coated on a surface of the primer layer. A rare element in the form of La2O3 is added to the coating to purify a grain boundary of the coating.