摘要:
The present invention relates to a method for preparing hierarchically ordered structures of inorganic phosphate particles, homogeneously deposited on the surface of a phyllosilicate, which is characterized in that it comprises the following steps: a) obtaining an acid solution of precursor compounds of an inorganic phosphate; b) preparing a dispersion of particles of a phyllosilicate in aqueous medium and acidifying the phyllosilicate dispersion by adding at least one acid, thereby obtaining an acid dispersion; c) mixing the acid solution obtained in step a) with the dispersion obtained in step b); and d), with stirring, adding a base to the mixture obtained in step c) until the required pH value for precipitating the corresponding inorganic phosphate on the phyllosilicate particles has been achieved, resulting in a hierarchically ordered structure of homogeneously distributed submicrometric or nanometric inorganic phosphate particles supported on the phyllosilicate surface.
摘要:
The present invention relates to the use of non-deactivatable security compositions comprising the combination of at least two types of particles of oxide materials, where said particles have a different size and/or morphology, and where the inorganic oxide materials have at least one transition metal or one lanthanide element, and radiofrequency wave absorption properties. The invention also relates to security articles, documents or elements incorporating these compositions, as well as to a method and to a system for detection thereof.
摘要:
The process is characterised in that it comprises at least one sol-gel layer with a maximum thickness of 800 nm, where said sol-gel layer comprises nanoparticles with a laminar crystal structure, and where each sol-gel layer is obtained from a silicon alkoxide solution; preparation of a dispersion that comprises at least one type of particles with a spherical, fibrillar or laminar morphology, and a laminar crystal structure, wherein at least one of the dimensions, thickness or diameter, of said particles is less than 400 nm; addition of the dispersion prepared to the solution; deposition of the suspension on said substrate; thermal treatment of the substrate; and, in the case of multilayer coatings, optionally, the addition of high-dimensional particles and repetition of the steps, provided that the thermal treatment of the last layer, or outer layer, is performed at a temperature equal to or greater than that of the preceding layer. The invention also relates to the sol-gel coating thus obtained.The present invention solves the problem of contraction in the densification of high-thickness sol-gel coatings and, moreover, provides a process for obtaining a sol-gel coating useful for ceramic surfaces with a large size and/or complex shapes.
摘要:
A method for producing a domestic appliance plate from a starting mixture. In order to provide a domestic appliance plate having a high resistance to thermal shock, good thermal insulation, and advantageous mechanical properties, at least magnesium silicate hydrate, kaolinite, calcined kaolinite, and aluminum oxide are used for the starting mixture.
摘要:
A method for producing a domestic appliance plate from a starting mixture. In order to provide a domestic appliance plate having a high resistance to thermal shock, good thermal insulation, and advantageous mechanical properties, at least magnesium silicate hydrate, kaolinite, calcined kaolinite, and aluminum oxide are used for the starting mixture.
摘要:
A method for producing a domestic appliance plate from a starting mixture. In order to provide a domestic appliance plate having a high resistance to thermal shock, good thermal insulation, and advantageous mechanical properties, at least magnesium silicate hydrate, kaolinite, calcined kaolinite, and aluminum oxide are used for the starting mixture.