Abstract
A precursor for Mg-Al spinel has been synthesized via the precipitation method, using ammonium bicarbonate as the precipitant. The precursor was composed of crystalline ammonium dawsonite hydrate [NH4Al(OH)2CO3·H2O] and hydrotalcite [Mg6Al2(CO3)(OH)16·4H2O] phases. The precursor converted to pure spinel phase at approximately 900 °C via two steps upon calcination: (i) decomposition of hydrotalcite at lower temperatures (400-800 °C) and (ii) solid-state reaction between MgO (decomposed from hydrotalcite) and γ-Al2O3 (derived from NH4Al(OH)2CO3·H2O) at higher temperatures (>800 °C). The effect of calcination temperature on particle morphology and sinterability of the resultant spinel powders were investigated.
| Original language | English |
|---|---|
| Pages (from-to) | 139-148 |
| Number of pages | 10 |
| Journal | Journal of the European Ceramic Society |
| Volume | 21 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2001 Feb 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Ceramics and Composites
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Synthesis of Mg-Al spinel powder via precipitation using ammonium bicarbonate as the precipitant. / Li, Ji Guang; Ikegami, Takayasu; Lee, Jong Heun; Mori, Toshiyuki; Yajima, Yoshiyuki.
In: Journal of the European Ceramic Society, Vol. 21, No. 2, 01.02.2001, p. 139-148.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Synthesis of Mg-Al spinel powder via precipitation using ammonium bicarbonate as the precipitant
AU - Li, Ji Guang
AU - Ikegami, Takayasu
AU - Lee, Jong Heun
AU - Mori, Toshiyuki
AU - Yajima, Yoshiyuki
PY - 2001/2/1
Y1 - 2001/2/1
N2 - A precursor for Mg-Al spinel has been synthesized via the precipitation method, using ammonium bicarbonate as the precipitant. The precursor was composed of crystalline ammonium dawsonite hydrate [NH4Al(OH)2CO3·H2O] and hydrotalcite [Mg6Al2(CO3)(OH)16·4H2O] phases. The precursor converted to pure spinel phase at approximately 900 °C via two steps upon calcination: (i) decomposition of hydrotalcite at lower temperatures (400-800 °C) and (ii) solid-state reaction between MgO (decomposed from hydrotalcite) and γ-Al2O3 (derived from NH4Al(OH)2CO3·H2O) at higher temperatures (>800 °C). The effect of calcination temperature on particle morphology and sinterability of the resultant spinel powders were investigated.
AB - A precursor for Mg-Al spinel has been synthesized via the precipitation method, using ammonium bicarbonate as the precipitant. The precursor was composed of crystalline ammonium dawsonite hydrate [NH4Al(OH)2CO3·H2O] and hydrotalcite [Mg6Al2(CO3)(OH)16·4H2O] phases. The precursor converted to pure spinel phase at approximately 900 °C via two steps upon calcination: (i) decomposition of hydrotalcite at lower temperatures (400-800 °C) and (ii) solid-state reaction between MgO (decomposed from hydrotalcite) and γ-Al2O3 (derived from NH4Al(OH)2CO3·H2O) at higher temperatures (>800 °C). The effect of calcination temperature on particle morphology and sinterability of the resultant spinel powders were investigated.
UR - http://www.scopus.com/inward/record.url?scp=0035254264&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035254264&partnerID=8YFLogxK
U2 - 10.1016/S0955-2219(00)00188-6
DO - 10.1016/S0955-2219(00)00188-6
M3 - Article
VL - 21
SP - 139
EP - 148
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 2
ER -