Reaction heat utilization potential in mullite and spinel based ceramics synthesis and sintering

Research output: Contribution to conferenceConference articleScientific

Abstract

Typically synthesis of technical ceramics, such mullite and spinels, requires high temperatures and long sintering times. Traditional production routes consume lot of energy, which increases the cost of products and have high environmental burden. Therefore low-energy intensity processing routes are sought for. Self-propagating High-temperature Synthesis (SHS) is offering one energy efficient route for making advanced composites and intermetallic compounds. The SHS process is traditionally limited only to highly exothermic reactions where the released combustion energy is exploited. Present work studies the potential of utilization the heat released from the exothermic reactions in ceramic synthesis and sintering. For example the initialization of the endothermic reaction of mullite formation reaction is studied. Exothermically reactive raw material (aluminium powder) is examined for less external energy requiring synthesis of mullite and magnesium aluminate spinel based ceramics. Thermodynamics calculations and the analysis of the energy balance compared to the conventional sintering bonding are presented for selected materials. In addition thermogravimetry (TGA) combined to Differential Scanning Calorimetry (DSC) is used for examination of thermal behaviour of raw materials and reacted materials. X-ray diffractometry (XRD) and scanning electron microscope (SEM) studies are used for phase structure analysis.
Original languageEnglish
Publication statusPublished - 2016
EventInnovative Manufacturing Technology, IMT 2016 - Krynica Zdrój, Poland
Duration: 13 Apr 201615 Apr 2016

Conference

ConferenceInnovative Manufacturing Technology, IMT 2016
Abbreviated titleIMT 2016
CountryPoland
CityKrynica Zdrój
Period13/04/1615/04/16

Fingerprint

Sintering
Exothermic reactions
Raw materials
Phase structure
Energy balance
Aluminum
Powders
X ray diffraction analysis
Intermetallics
Thermogravimetric analysis
Differential scanning calorimetry
Electron microscopes
Hot Temperature
spinell
aluminosilicate
Thermodynamics
Scanning
Temperature
Composite materials
Processing

Keywords

  • low-energy intensity processing
  • mullite and spinel based ceramics

Cite this

Karhu, M., Lagerbom, J., & Kivikytö-Reponen, P. (2016). Reaction heat utilization potential in mullite and spinel based ceramics synthesis and sintering. Paper presented at Innovative Manufacturing Technology, IMT 2016, Krynica Zdrój, Poland.
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abstract = "Typically synthesis of technical ceramics, such mullite and spinels, requires high temperatures and long sintering times. Traditional production routes consume lot of energy, which increases the cost of products and have high environmental burden. Therefore low-energy intensity processing routes are sought for. Self-propagating High-temperature Synthesis (SHS) is offering one energy efficient route for making advanced composites and intermetallic compounds. The SHS process is traditionally limited only to highly exothermic reactions where the released combustion energy is exploited. Present work studies the potential of utilization the heat released from the exothermic reactions in ceramic synthesis and sintering. For example the initialization of the endothermic reaction of mullite formation reaction is studied. Exothermically reactive raw material (aluminium powder) is examined for less external energy requiring synthesis of mullite and magnesium aluminate spinel based ceramics. Thermodynamics calculations and the analysis of the energy balance compared to the conventional sintering bonding are presented for selected materials. In addition thermogravimetry (TGA) combined to Differential Scanning Calorimetry (DSC) is used for examination of thermal behaviour of raw materials and reacted materials. X-ray diffractometry (XRD) and scanning electron microscope (SEM) studies are used for phase structure analysis.",
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author = "Marjaana Karhu and Juha Lagerbom and P{\"a}ivi Kivikyt{\"o}-Reponen",
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Karhu, M, Lagerbom, J & Kivikytö-Reponen, P 2016, 'Reaction heat utilization potential in mullite and spinel based ceramics synthesis and sintering' Paper presented at Innovative Manufacturing Technology, IMT 2016, Krynica Zdrój, Poland, 13/04/16 - 15/04/16, .

Reaction heat utilization potential in mullite and spinel based ceramics synthesis and sintering. / Karhu, Marjaana; Lagerbom, Juha; Kivikytö-Reponen, Päivi.

2016. Paper presented at Innovative Manufacturing Technology, IMT 2016, Krynica Zdrój, Poland.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

T1 - Reaction heat utilization potential in mullite and spinel based ceramics synthesis and sintering

AU - Karhu, Marjaana

AU - Lagerbom, Juha

AU - Kivikytö-Reponen, Päivi

N1 - Project code: 101939

PY - 2016

Y1 - 2016

N2 - Typically synthesis of technical ceramics, such mullite and spinels, requires high temperatures and long sintering times. Traditional production routes consume lot of energy, which increases the cost of products and have high environmental burden. Therefore low-energy intensity processing routes are sought for. Self-propagating High-temperature Synthesis (SHS) is offering one energy efficient route for making advanced composites and intermetallic compounds. The SHS process is traditionally limited only to highly exothermic reactions where the released combustion energy is exploited. Present work studies the potential of utilization the heat released from the exothermic reactions in ceramic synthesis and sintering. For example the initialization of the endothermic reaction of mullite formation reaction is studied. Exothermically reactive raw material (aluminium powder) is examined for less external energy requiring synthesis of mullite and magnesium aluminate spinel based ceramics. Thermodynamics calculations and the analysis of the energy balance compared to the conventional sintering bonding are presented for selected materials. In addition thermogravimetry (TGA) combined to Differential Scanning Calorimetry (DSC) is used for examination of thermal behaviour of raw materials and reacted materials. X-ray diffractometry (XRD) and scanning electron microscope (SEM) studies are used for phase structure analysis.

AB - Typically synthesis of technical ceramics, such mullite and spinels, requires high temperatures and long sintering times. Traditional production routes consume lot of energy, which increases the cost of products and have high environmental burden. Therefore low-energy intensity processing routes are sought for. Self-propagating High-temperature Synthesis (SHS) is offering one energy efficient route for making advanced composites and intermetallic compounds. The SHS process is traditionally limited only to highly exothermic reactions where the released combustion energy is exploited. Present work studies the potential of utilization the heat released from the exothermic reactions in ceramic synthesis and sintering. For example the initialization of the endothermic reaction of mullite formation reaction is studied. Exothermically reactive raw material (aluminium powder) is examined for less external energy requiring synthesis of mullite and magnesium aluminate spinel based ceramics. Thermodynamics calculations and the analysis of the energy balance compared to the conventional sintering bonding are presented for selected materials. In addition thermogravimetry (TGA) combined to Differential Scanning Calorimetry (DSC) is used for examination of thermal behaviour of raw materials and reacted materials. X-ray diffractometry (XRD) and scanning electron microscope (SEM) studies are used for phase structure analysis.

KW - low-energy intensity processing

KW - mullite and spinel based ceramics

M3 - Conference article

ER -

Karhu M, Lagerbom J, Kivikytö-Reponen P. Reaction heat utilization potential in mullite and spinel based ceramics synthesis and sintering. 2016. Paper presented at Innovative Manufacturing Technology, IMT 2016, Krynica Zdrój, Poland.