Synthesis of Mg-Al spinel powder via precipitation using ammonium bicarbonate as the precipitant

Ji Guang Li; Takayasu Ikegami; Jong Heun Lee; Toshiyuki Mori; Yoshiyuki Yajima

doi:10.1016/S0955-2219(00)00188-6

Synthesis of Mg-Al spinel powder via precipitation using ammonium bicarbonate as the precipitant

Ji Guang Li, Takayasu Ikegami, Jong Heun Lee, Toshiyuki Mori, Yoshiyuki Yajima

Research output: Contribution to journal › Article › peer-review

107 Citations (Scopus)

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	https://doi.org/10.1016/S0955-2219(00)00188-6
Publication status	Published - 2001 Feb
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/S0955-2219(00)00188-6

Cite this

@article{9c6f1742adc046bca3449bbd49efa6bd,

title = "Synthesis of Mg-Al spinel powder via precipitation using ammonium bicarbonate as the precipitant",

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.",

author = "Li, {Ji Guang} and Takayasu Ikegami and Lee, {Jong Heun} and Toshiyuki Mori and Yoshiyuki Yajima",

year = "2001",

month = feb,

doi = "10.1016/S0955-2219(00)00188-6",

language = "English",

volume = "21",

pages = "139--148",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier BV",

number = "2",

}

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

Y1 - 2001/2

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

AN - SCOPUS:0035254264

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 -

Synthesis of Mg-Al spinel powder via precipitation using ammonium bicarbonate as the precipitant

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this