TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Controlling the phase of iron oxide nanoparticles fabricated from iron(III) nitrate by liquid flame spray

Tutkimustuotosvertaisarvioitu

Standard

Controlling the phase of iron oxide nanoparticles fabricated from iron(III) nitrate by liquid flame spray. / Sorvali, Miika; Nikka, Markus; Juuti, Paxton; Honkanen, Mari; Salminen, Turkka; Hyvärinen, Leo; Mäkelä, Jyrki M.

julkaisussa: International Journal of Ceramic Engineering & Science, Vuosikerta 1, Nro 4, 12.09.2019, s. 194–205.

Tutkimustuotosvertaisarvioitu

Harvard

APA

Vancouver

Author

Bibtex - Lataa

@article{b9b1d0f7088445cb8573536cd96ce6cc,
title = "Controlling the phase of iron oxide nanoparticles fabricated from iron(III) nitrate by liquid flame spray",
abstract = "Iron oxide nanoparticles were synthesized in a liquid flame spray process from iron(III) nitrate. The choice of chemicals and all other process parameters affects the crystallographic phase composition and the quality of the material. Adjustment of the solvent composition and the gas flow rates was used to control the phase composition of the produced particles. All samples consisted of pure maghemite (γ‐Fe2O3) or a mixture of maghemite and hematite (α‐Fe2O3). When using pure alcohols as solvents, the maghemite/hematite phase ratio could be adjusted by changing the equivalence ratio that describes the oxidation conditions in the flame zone. A large residual particle mode formed in the size range of ~20‐700 nm along with a dominant very fine particle mode (2‐8 nm). Both phases seemed to contain large particles. A partial substitution of methanol with carboxylic acids turned the hematite phase into maghemite completely, even though some of particles were possibly not fully crystallized. Residual particles were still present, but their size and number could be decreased by raising the heat of combustion of the precursor solution. 30 vol‐{\%} substitution of methanol with 2‐ethylhexanoic acid was adequate to mostly erase the large particles.",
author = "Miika Sorvali and Markus Nikka and Paxton Juuti and Mari Honkanen and Turkka Salminen and Leo Hyv{\"a}rinen and M{\"a}kel{\"a}, {Jyrki M.}",
year = "2019",
month = "9",
day = "12",
doi = "10.1002/ces2.10025",
language = "English",
volume = "1",
pages = "194–205",
journal = "International Journal of Ceramic Engineering & Science",
issn = "2578-3270",
publisher = "The American Ceramic Society",
number = "4",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Controlling the phase of iron oxide nanoparticles fabricated from iron(III) nitrate by liquid flame spray

AU - Sorvali, Miika

AU - Nikka, Markus

AU - Juuti, Paxton

AU - Honkanen, Mari

AU - Salminen, Turkka

AU - Hyvärinen, Leo

AU - Mäkelä, Jyrki M.

PY - 2019/9/12

Y1 - 2019/9/12

N2 - Iron oxide nanoparticles were synthesized in a liquid flame spray process from iron(III) nitrate. The choice of chemicals and all other process parameters affects the crystallographic phase composition and the quality of the material. Adjustment of the solvent composition and the gas flow rates was used to control the phase composition of the produced particles. All samples consisted of pure maghemite (γ‐Fe2O3) or a mixture of maghemite and hematite (α‐Fe2O3). When using pure alcohols as solvents, the maghemite/hematite phase ratio could be adjusted by changing the equivalence ratio that describes the oxidation conditions in the flame zone. A large residual particle mode formed in the size range of ~20‐700 nm along with a dominant very fine particle mode (2‐8 nm). Both phases seemed to contain large particles. A partial substitution of methanol with carboxylic acids turned the hematite phase into maghemite completely, even though some of particles were possibly not fully crystallized. Residual particles were still present, but their size and number could be decreased by raising the heat of combustion of the precursor solution. 30 vol‐% substitution of methanol with 2‐ethylhexanoic acid was adequate to mostly erase the large particles.

AB - Iron oxide nanoparticles were synthesized in a liquid flame spray process from iron(III) nitrate. The choice of chemicals and all other process parameters affects the crystallographic phase composition and the quality of the material. Adjustment of the solvent composition and the gas flow rates was used to control the phase composition of the produced particles. All samples consisted of pure maghemite (γ‐Fe2O3) or a mixture of maghemite and hematite (α‐Fe2O3). When using pure alcohols as solvents, the maghemite/hematite phase ratio could be adjusted by changing the equivalence ratio that describes the oxidation conditions in the flame zone. A large residual particle mode formed in the size range of ~20‐700 nm along with a dominant very fine particle mode (2‐8 nm). Both phases seemed to contain large particles. A partial substitution of methanol with carboxylic acids turned the hematite phase into maghemite completely, even though some of particles were possibly not fully crystallized. Residual particles were still present, but their size and number could be decreased by raising the heat of combustion of the precursor solution. 30 vol‐% substitution of methanol with 2‐ethylhexanoic acid was adequate to mostly erase the large particles.

U2 - 10.1002/ces2.10025

DO - 10.1002/ces2.10025

M3 - Article

VL - 1

SP - 194

EP - 205

JO - International Journal of Ceramic Engineering & Science

JF - International Journal of Ceramic Engineering & Science

SN - 2578-3270

IS - 4

ER -