IDENTIFICATION OF THE CRYSTALLINE AND AMORPHOUS PHASES IN THE DRIED RAW ALUMINA HYDROXIDE

被引：0

作者：

Dobra, Gheorghe ^{[1
]}

Badilita, Viorel ^{[2
]}

Iliev, Sorin ^{[1
]}

Cotet, Lucian ^{[1
]}

Filipescu, Laurentiu ^{[3
]}

Boiangiu, Alina ^{[1
]}

机构：

[1] SC Alum SA, Tulcea, Romania

[2] INCD IMNR Bucuresti, Bucharest, Romania

[3] Univ Politehn Bucuresti, Sch Chem Engn, Bucharest, Romania

来源：

UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES B-CHEMISTRY AND MATERIALS SCIENCE | 2019年 / 81卷 / 04期

关键词：

alumina hydroxide; mineralogy; phases; drying; identification; FLAME-RETARDANT;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The crystalline and amorphous phases, excepting the gibbsite, from the samples collected at temperatures 120-160 degrees C have a low crystalline degree or at least are intensely eroded (being phases transported as small particles by the heating gases of the moist hydrate). As a result, quantitative determination of these phases in the samples collected at temperatures 120-160 degrees C proved to be a difficult problem, even if the measuring instrument is an advanced one and the Rietveld finishing program has been applied. The paper describes a method of identifying and characterizing these phases and provides information about this grade of alumina hydroxide availability and marketability.

引用

页码：163 / 174

页数：12

共 50 条

[21] High-pressure phases of amorphous and crystalline silicon
Durandurdu, M
Drabold, DA
PHYSICAL REVIEW B, 2003, 67 (21):
[22] STABILITY OF AMORPHOUS AND CRYSTALLINE PHASES IN AN IRRADIATION ENVIRONMENT.
Brimhall, J.L.
Simonen, E.P.
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 1985, B16 (2-3) : 187 - 192
[23] Evolution with Temperature of Crystalline and Amorphous Phases in Porcelain Stoneware
Martin-Marquez, Jorge
De la Torre, Angeles G.
Aranda, Miguel A. G.
Ma Rincon, Jesus
Romero, Maximina
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2009, 92 (01) : 229 - 234
[24] Characterization of crystalline and spray-dried amorphous α-cyclodextrin powders
Ho, Thao M.
Howes, Tony
Bhandari, Bhesh R.
POWDER TECHNOLOGY, 2015, 284 : 585 - 594
[25] NUCLEATION OF CRYSTALLINE PHASES IN PLASTICALLY DEFORMED AMORPHOUS NIZR
MAZZONE, G
ANTISARI, MV
JOURNAL OF APPLIED PHYSICS, 1995, 77 (10) : 5020 - 5025
[26] SPECTROSCOPIC DIFFERENCES BETWEEN CRYSTALLINE AND AMORPHOUS PHASES OF INDIGO
MONAHAN, AR
KUDER, JE
JOURNAL OF ORGANIC CHEMISTRY, 1972, 37 (25): : 4182 - 4184
[27] Stability and instability of crystalline and amorphous phases at high pressure
Ponyatovsky, EG
STABILITY OF MATERIALS, 1996, 355 : 615 - 644
[28] IDENTIFICATION OF BETA-ALUMINA TYPE PHASES
DYSON, DJ
JOHNSON, W
TRANSACTIONS AND JOURNAL OF THE BRITISH CERAMIC SOCIETY, 1973, 72 (02): : 49 - 55
[29] The mechanism of the dehydration of crystalline aluminum hydroxide and of the adsorption of water by the resulting alumina
Milligan, LH
JOURNAL OF PHYSICAL CHEMISTRY, 1922, 26 (03): : 247 - 255
[30] Local structure characterization of gadolinium doped amorphous and crystalline alumina
Simon, S
MODERN PHYSICS LETTERS B, 2001, 15 (12-13): : 375 - 384

← 1 2 3 4 5 →