公开(公告)号：US20180127601A1

公开(公告)日：2018-05-10

申请号：US15347405

申请日：2016-11-09

申请人： NATIONAL CHENG KUNG UNIVERSITY

发明人： Yen-Hua CHEN ,  Pin-Jung LAI ,  Chi-Hui LIANG

IPC分类号： C09D7/12 ,  C01B33/32 ,  C01B33/193 ,  B01J2/04

CPC分类号： C09D7/61 ,  B01J2/04 ,  C01B33/193 ,  C01B33/32 ,  C01P2004/64 ,  C08K3/36 ,  C08K9/00 ,  C09D1/00 ,  C09D7/67

摘要： A method for preparing silica nanoparticles includes the steps of: slowly titrating a sodium silicate solution with an acid solution to obtain a silicic acid-containing solution; continuously stirring the silicic acid-containing solution; slowly titrating the silicic acid-containing solution with the acid solution to obtain a silicic acid-enriched solution; continuously stirring the silicic acid-enriched solution; collecting the silicic acid-enriched solution as a silica nanoparticle precursor solution when a pH value of the silicic acid-enriched solution reaches a target pH value; and subjecting the silica nanoparticle precursor solution to a flame spray pyrolysis or a drying-grinding-calcining treatment.

公开(公告)号：US20240158243A1

公开(公告)日：2024-05-16

申请号：US17985282

申请日：2022-11-11

申请人： NATIONAL CHENG KUNG UNIVERSITY

发明人： Yen-Hua CHEN ,  Jia-Cheng NI

IPC分类号： C01B33/26 ,  C01F11/00 ,  C01G31/02

CPC分类号： C01B33/26 ,  C01F11/00 ,  C01G31/02

摘要： An artificial tanzanite comprises aluminosilicate and vanadium, wherein the content of the aluminosilicate is in a range from 1 mass % to 30 mass % and the content of the vanadium is in a range from 1000 ppm to 40000 ppm. The artificial tanzanite is prepared by a method comprising: providing a synthetic raw material, wherein the synthetic raw material comprises the aluminosilicate, silicon-containing oxide, vanadium-containing oxide, and calcium-containing salt; and heating the synthetic raw material to a synthetic temperature, and keeping the synthetic raw material under a synthetic pressure to carry out synthetic reaction to form the artificial tanzanite after a period of synthetic time.