Published March 2003 | Version v1
Journal article Metadata-only

High-temperature dehydration of hydrophilic oxides ZrO2 and Al2O3

Creators

  • 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Fakul'tet Nauk o Materialakh, Moscow (Russian Federation)
  • 2. RAN, Inst. Obshchej i Neorganicheskoj Khimii, Moscow (Russian Federation)
  • 3. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Khimicheskij Fakul'tet, Moscow (Russian Federation)

Description

Dehydration reaction kinetics was investigated and estimation of activation energy for the ZrO2 and Al2O3 hydrophilic oxides prepared by the use of two procedures: isothermal decomposition of zirconyl and aluminium nitrates, and oxides synthesized by sol-gel method was conducted. It is shown that the activation energy of the dehydration process of metastable phases of zirconium and aluminium oxides is 2.5 - 3 as large as that activation energy values of the dehydration process of samples synthesized by the thermal decomposition method of the corresponding nitrates

Abstract (Russian)

Исследована кинетика реакции дегидратации и проведена оценка энергии активации для гидрофильных оксидов ZrO2 и Al2O3, полученных с использованием двух методик: изотермического разложения нитратов цирконила и алюминия и оксидов, синтезированных золь-гель методом. Показано, что энергия активации процесса дегидратации метастабильных фаз оксидов циркония и алюминия, синтезированных золь-гель методом, в среднем в 2.5 - 3 раза больше значений энергий активации процесса дегидратации образцов, синтезированных методом термического разложения соответствующих нитратов

Additional details

Additional titles

Original title (Russian)
Дегидратация гидрофильных оксидов ZrO

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
48
Journal Issue
3
Journal Page Range
p. 484-488
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
35022002
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ACTIVATION ENERGY; CHEMICAL PREPARATION; CHEMICAL REACTION KINETICS; DEHYDRATION; ISOTHERMAL PROCESSES; NITRATES; PYROLYSIS; SOL-GEL PROCESS; TEMPERATURE RANGE 0400-1000 K; TEMPERATURE RANGE 1000-4000 K; ZIRCONIUM OXIDES
Descriptors DEC
CHALCOGENIDES; CHEMICAL REACTIONS; DECOMPOSITION; ENERGY; KINETICS; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; SYNTHESIS; TEMPERATURE RANGE; THERMOCHEMICAL PROCESSES; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS

Optional Information

Notes
13 refs., 2 figs., 2 tabs.