摘要:
The present invention relates to flaky alpha-alumina crystals with large aspect ratio and its preparation method, and particularly to flaky alpha-alumina crystals comprising aluminum oxide, zinc oxide and tin oxide, which are prepared by obtaining a mixed gel which are prepared by obtaining a mixed gel by means of hydrolysis of an aqueous aluminum precursor solution comprising aqueous flux, aqueous zinc precursor solution and tin precursor aqueous solution, followed by aging, drying and crystallization processes. The crystals herein have an average particle thickness of 0.5 μm or less, an average particle diameter of 30 μm or higher and an aspect ratio of 100 or higher, thus being useful as a substrate of high quality pearlescent pigments, an abrasive, ceramic material and a filling material.
摘要:
The present invention relates to flaky alpha-alumina crystals with large aspect ratio and its preparation method, and particularly to flaky alpha-alumina crystals comprising aluminum oxide, zinc oxide and tin oxide, which are prepared by obtaining a mixed gel which are prepared by obtaining a mixed gel by means of hydrolysis of an aqueous aluminum precursor solution comprising aqueous flux, aqueous zinc precursor solution and tin precursor aqueous solution, followed by aging, drying and crystallization processes. The crystals herein have an average particle thickness of 0.5 um or less, an average particle diameter of 30 μm or higher and an aspect ratio of 100 or higher, thus being useful as a substrate of high quality pearlescent pigments, an abrasive, ceramic material and a filling material.
摘要:
The present invention relates to a pearlescent pigment with large aspect ratio and a method of their preparation, and particularly to pearlescent pigments prepared by coating a metal or metal precursor on the flaky alpha-alumina crystals obtained by using an aluminum precursor aqueous solution and a zinc precursor aqueous solution as main ingredients. The crystals herein has an average particle thickness of 0.5 μm or less, an average particle diameter of 15 μm or higher and a large aspect ratio of 50 or higher, thereby being superior in gloss. The crystals show metal colors and interference colors of silver, gold, red, purple, blue and green.
摘要:
The present invention relates to a pearlescent pigment with large aspect ratio and a method of their preparation, and particularly to pearlescent pigments prepared by coating a metal or metal precursor on the flaky alpha-alumina crystals obtained by using an aluminum precursor aqueous solution and a zinc precursor aqueous solution as main ingredients. The crystals herein has an average particle thickness of 0.5 μm or less, an average particle diameter of 15 μm or higher and a large aspect ratio of 50 or higher, thereby being superior in gloss. The crystals show metal colors and interference colors of silver, gold, red, purple, blue and green.
摘要:
The present invention relates to a flaky α-alumina crystal and a preparation method thereof. More particularly, the present invention relates to a flaky α-alumina crystal comprising aluminum oxide and zinc oxide, which is prepared by hydrolyzing an aluminum precursor solution containing a water-soluble flux and a zinc precursor solution to obtain a gel mixture and aging, drying, calcining and crystallizing it under a specific reaction condition, and a preparation method thereof. Since the flaky α-alumina crystal of the present invention has a thickness of less than 0.5 μm, an average particle diameter of at least 15 μm and an aspect ratio of at least 50, it is useful as high-quality pearlescent pigment material and filler for ceramic materials.
摘要:
The present invention relates to a flaky α-alumina crystal and a preparation method thereof. More particularly, the present invention relates to a flaky α-alumina crystal comprising aluminum oxide and zinc oxide, which is prepared by hydrolyzing an aluminum precursor solution containing a water-soluble flux and a zinc precursor solution to obtain a gel mixture and aging, drying, calcining and crystallizing it under a specific reaction condition, and a preparation method thereof. Since the flaky α-alumina crystal of the present invention has a thickness of less than 0.5 μm, an average particle diameter of at least 15 μm and an aspect ratio of at least 50, it is useful as high-quality pearlescent pigment material and filler for ceramic materials.
摘要:
The present invention relates to a flake pigment, a preparation method thereof and a cosmetic composition comprising the same, and particularly to a flake pigment prepared by coating a metal oxide on the surface of a flake synthetic aluminum having predetermined ranges of an aspect ratio and an average particle diameter, wherein the pigment shows interference colors while reducing the glossiness, thereby enabling cosmetics containing the pigments to be superior in natural transparency and adhesive and slipping properties as well as in color expression and a mat feel due to a low glossiness, along with a preparation method thereof and a cosmetic composition comprising the same.