发明名称 |
METHOD OF PREPARING SYNTHETIC MATERIAL WITH NOBLE OPAL STRUCTURE |
摘要 |
jewelry. SUBSTANCE: monodisperse suspension with amorphous silica of 140 to 600 nm in particle size is first prepared and then subjected to layer precipitation. Precipitate is dried first at 100-150 C for 10 to 30 h and then at reduced pressure (1-10 Pa). Dry precipitate is subjected to pneumatolytic annealing at 350-400 C and pressure 15-45 MPa in presence of water and tetraethoxysilane vapors, impregnated with silica sol, and thermally treated at 400-600 C for 1-2 h. EFFECT: achieved structure of noble opal approaching to a greatest degree to natural opal regarding its jewelry characteristics. 2 ex
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申请公布号 |
RU2162456(C1) |
申请公布日期 |
2001.01.27 |
申请号 |
RU20000106541 |
申请日期 |
2000.03.17 |
申请人 |
OBSHCHESTVO S OGRANICHENNOJ OTVETSTVENNOST'JU "AGE;NTSTVO MARKETINGA NAUCHNYKH RA |
发明人 |
SAMOJLOVICH M.I.;SAMOJLOVICH S.M. |
分类号 |
C04B35/14;C01B33/113;(IPC1-7):C04B35/14 |
主分类号 |
C04B35/14 |
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