Aerosol synthesis of Ti-O powders via in-droplet hydrolysis of titanium alkoxide

Petri Ahonen, Unto Tapper, Jean-Claude Joubert, Jean-Luc Deschanvres, E.I. Kauppinen (Corresponding Author)

    Research output: Contribution to journalArticleScientificpeer-review

    37 Citations (Scopus)

    Abstract

    A method to produce Ti–O powders by an in-droplet hydrolysis of metal alkoxide precursor is presented. Titanium n-tetrabutoxide, hydrolysis water, and acetic acid were included in the ethanolic precursor solution that was nebulized. The resulting aerosol was transported to a tubular flow reactor where the ethanol evaporation initiated a polycondensation reaction and solid particles were formed starting from droplet surface. Titanium hydrous oxide particles were obtained at 200°C in atmospheric pressure of nitrogen and air. The collected powders were characterized by XRD, TG–SDTA, BET, SEM, TEM, and IR- spectroscopy, as well as with aerosol impactor. The as-produced powder particles were amorphous, smooth on the surface, and either spherical or deflated in shape. Aerodynamic mass mean diameter was 2.7 μm. Nanocrystalline TiO2 was obtained after thermal post-annealing for one hour. An expected tendency to convert to anatase crystalline phase up to 500°C and subsequently to rutile phase up to 900°C in the annealing was observed. The results show that the in-droplet hydrolysis is a viable method in preparing fine Ti–O powder particles with controlled properties.
    Original languageEnglish
    Pages (from-to)113-121
    Number of pages9
    JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
    Volume315
    Issue number1-2
    DOIs
    Publication statusPublished - 2001
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    alkoxides
    Titanium
    Aerosols
    Powders
    hydrolysis
    Hydrolysis
    aerosols
    titanium
    synthesis
    Annealing
    impactors
    annealing
    Titanium oxides
    Polycondensation
    acetic acid
    aerodynamics
    Acetic acid
    titanium oxides
    Acetic Acid
    anatase

    Cite this

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    title = "Aerosol synthesis of Ti-O powders via in-droplet hydrolysis of titanium alkoxide",
    abstract = "A method to produce Ti–O powders by an in-droplet hydrolysis of metal alkoxide precursor is presented. Titanium n-tetrabutoxide, hydrolysis water, and acetic acid were included in the ethanolic precursor solution that was nebulized. The resulting aerosol was transported to a tubular flow reactor where the ethanol evaporation initiated a polycondensation reaction and solid particles were formed starting from droplet surface. Titanium hydrous oxide particles were obtained at 200°C in atmospheric pressure of nitrogen and air. The collected powders were characterized by XRD, TG–SDTA, BET, SEM, TEM, and IR- spectroscopy, as well as with aerosol impactor. The as-produced powder particles were amorphous, smooth on the surface, and either spherical or deflated in shape. Aerodynamic mass mean diameter was 2.7 μm. Nanocrystalline TiO2 was obtained after thermal post-annealing for one hour. An expected tendency to convert to anatase crystalline phase up to 500°C and subsequently to rutile phase up to 900°C in the annealing was observed. The results show that the in-droplet hydrolysis is a viable method in preparing fine Ti–O powder particles with controlled properties.",
    author = "Petri Ahonen and Unto Tapper and Jean-Claude Joubert and Jean-Luc Deschanvres and E.I. Kauppinen",
    note = "Project code: K7SU00028",
    year = "2001",
    doi = "10.1016/S0921-5093(01)01153-4",
    language = "English",
    volume = "315",
    pages = "113--121",
    journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
    issn = "0921-5093",
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    Aerosol synthesis of Ti-O powders via in-droplet hydrolysis of titanium alkoxide. / Ahonen, Petri; Tapper, Unto; Joubert, Jean-Claude; Deschanvres, Jean-Luc; Kauppinen, E.I. (Corresponding Author).

    In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 315, No. 1-2, 2001, p. 113-121.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Aerosol synthesis of Ti-O powders via in-droplet hydrolysis of titanium alkoxide

    AU - Ahonen, Petri

    AU - Tapper, Unto

    AU - Joubert, Jean-Claude

    AU - Deschanvres, Jean-Luc

    AU - Kauppinen, E.I.

    N1 - Project code: K7SU00028

    PY - 2001

    Y1 - 2001

    N2 - A method to produce Ti–O powders by an in-droplet hydrolysis of metal alkoxide precursor is presented. Titanium n-tetrabutoxide, hydrolysis water, and acetic acid were included in the ethanolic precursor solution that was nebulized. The resulting aerosol was transported to a tubular flow reactor where the ethanol evaporation initiated a polycondensation reaction and solid particles were formed starting from droplet surface. Titanium hydrous oxide particles were obtained at 200°C in atmospheric pressure of nitrogen and air. The collected powders were characterized by XRD, TG–SDTA, BET, SEM, TEM, and IR- spectroscopy, as well as with aerosol impactor. The as-produced powder particles were amorphous, smooth on the surface, and either spherical or deflated in shape. Aerodynamic mass mean diameter was 2.7 μm. Nanocrystalline TiO2 was obtained after thermal post-annealing for one hour. An expected tendency to convert to anatase crystalline phase up to 500°C and subsequently to rutile phase up to 900°C in the annealing was observed. The results show that the in-droplet hydrolysis is a viable method in preparing fine Ti–O powder particles with controlled properties.

    AB - A method to produce Ti–O powders by an in-droplet hydrolysis of metal alkoxide precursor is presented. Titanium n-tetrabutoxide, hydrolysis water, and acetic acid were included in the ethanolic precursor solution that was nebulized. The resulting aerosol was transported to a tubular flow reactor where the ethanol evaporation initiated a polycondensation reaction and solid particles were formed starting from droplet surface. Titanium hydrous oxide particles were obtained at 200°C in atmospheric pressure of nitrogen and air. The collected powders were characterized by XRD, TG–SDTA, BET, SEM, TEM, and IR- spectroscopy, as well as with aerosol impactor. The as-produced powder particles were amorphous, smooth on the surface, and either spherical or deflated in shape. Aerodynamic mass mean diameter was 2.7 μm. Nanocrystalline TiO2 was obtained after thermal post-annealing for one hour. An expected tendency to convert to anatase crystalline phase up to 500°C and subsequently to rutile phase up to 900°C in the annealing was observed. The results show that the in-droplet hydrolysis is a viable method in preparing fine Ti–O powder particles with controlled properties.

    U2 - 10.1016/S0921-5093(01)01153-4

    DO - 10.1016/S0921-5093(01)01153-4

    M3 - Article

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    SP - 113

    EP - 121

    JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

    JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

    SN - 0921-5093

    IS - 1-2

    ER -