Pressure Assisted Sintering of Barium Titanate for Dielectric Applications

I.J. Bennett, G. With, de, P.G.T. Varst, van der

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

The dielectric behaviour of High Purity Barium titanate (HPB) ceramics is strongly dependent on the grain size and porosity. For applications, control of grain size and porosity is required. Pressure-assisted sintering techniques at relatively low temperatures meet these requirements. In this study, hot-pressing (without a die) in the temperature range 1050°C-1200°C was investigated, using stacks of tape casted HPB foils with a typical grain size of 1.2 µm. The samples were pressed up to 60 minutes, applying a uniaxial pressure between 1 and 75 MPa. No lower threshold pressure for densification was observed in the pressure range studied and the lowest temperature to reach full density was determined to equal 1100°C. Using the experimental densification data, the applicability of the densification model as reported by Besson and Abouaf [1] was studied. Experimental process control was found to be possible, but this control remains empirical since the studied model was not capable of describing the actual physical situation properly.
Original languageEnglish
Title of host publication4th ECerS Conf., 2-6/10/95, Vol 2, Basic Science - Developments in processing of advanced ceramics - Part II
Place of PublicationRiccione, Italy
Pages121-126
Publication statusPublished - 1995
Eventconference; -; 1995-10-06; 1995-10-06 -
Duration: 6 Oct 19956 Oct 1995

Conference

Conferenceconference; -; 1995-10-06; 1995-10-06
Period6/10/956/10/95
Other-

Fingerprint

barium
sintering
densification
grain size
purity
porosity
hot pressing
tapes
foils
ceramics
requirements
thresholds
temperature

Cite this

Bennett, I. J., With, de, G., & Varst, van der, P. G. T. (1995). Pressure Assisted Sintering of Barium Titanate for Dielectric Applications. In 4th ECerS Conf., 2-6/10/95, Vol 2, Basic Science - Developments in processing of advanced ceramics - Part II (pp. 121-126). Riccione, Italy.
Bennett, I.J. ; With, de, G. ; Varst, van der, P.G.T. / Pressure Assisted Sintering of Barium Titanate for Dielectric Applications. 4th ECerS Conf., 2-6/10/95, Vol 2, Basic Science - Developments in processing of advanced ceramics - Part II. Riccione, Italy, 1995. pp. 121-126
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abstract = "The dielectric behaviour of High Purity Barium titanate (HPB) ceramics is strongly dependent on the grain size and porosity. For applications, control of grain size and porosity is required. Pressure-assisted sintering techniques at relatively low temperatures meet these requirements. In this study, hot-pressing (without a die) in the temperature range 1050°C-1200°C was investigated, using stacks of tape casted HPB foils with a typical grain size of 1.2 µm. The samples were pressed up to 60 minutes, applying a uniaxial pressure between 1 and 75 MPa. No lower threshold pressure for densification was observed in the pressure range studied and the lowest temperature to reach full density was determined to equal 1100°C. Using the experimental densification data, the applicability of the densification model as reported by Besson and Abouaf [1] was studied. Experimental process control was found to be possible, but this control remains empirical since the studied model was not capable of describing the actual physical situation properly.",
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Bennett, IJ, With, de, G & Varst, van der, PGT 1995, Pressure Assisted Sintering of Barium Titanate for Dielectric Applications. in 4th ECerS Conf., 2-6/10/95, Vol 2, Basic Science - Developments in processing of advanced ceramics - Part II. Riccione, Italy, pp. 121-126, conference; -; 1995-10-06; 1995-10-06, 6/10/95.

Pressure Assisted Sintering of Barium Titanate for Dielectric Applications. / Bennett, I.J.; With, de, G.; Varst, van der, P.G.T.

4th ECerS Conf., 2-6/10/95, Vol 2, Basic Science - Developments in processing of advanced ceramics - Part II. Riccione, Italy, 1995. p. 121-126.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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N2 - The dielectric behaviour of High Purity Barium titanate (HPB) ceramics is strongly dependent on the grain size and porosity. For applications, control of grain size and porosity is required. Pressure-assisted sintering techniques at relatively low temperatures meet these requirements. In this study, hot-pressing (without a die) in the temperature range 1050°C-1200°C was investigated, using stacks of tape casted HPB foils with a typical grain size of 1.2 µm. The samples were pressed up to 60 minutes, applying a uniaxial pressure between 1 and 75 MPa. No lower threshold pressure for densification was observed in the pressure range studied and the lowest temperature to reach full density was determined to equal 1100°C. Using the experimental densification data, the applicability of the densification model as reported by Besson and Abouaf [1] was studied. Experimental process control was found to be possible, but this control remains empirical since the studied model was not capable of describing the actual physical situation properly.

AB - The dielectric behaviour of High Purity Barium titanate (HPB) ceramics is strongly dependent on the grain size and porosity. For applications, control of grain size and porosity is required. Pressure-assisted sintering techniques at relatively low temperatures meet these requirements. In this study, hot-pressing (without a die) in the temperature range 1050°C-1200°C was investigated, using stacks of tape casted HPB foils with a typical grain size of 1.2 µm. The samples were pressed up to 60 minutes, applying a uniaxial pressure between 1 and 75 MPa. No lower threshold pressure for densification was observed in the pressure range studied and the lowest temperature to reach full density was determined to equal 1100°C. Using the experimental densification data, the applicability of the densification model as reported by Besson and Abouaf [1] was studied. Experimental process control was found to be possible, but this control remains empirical since the studied model was not capable of describing the actual physical situation properly.

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Bennett IJ, With, de G, Varst, van der PGT. Pressure Assisted Sintering of Barium Titanate for Dielectric Applications. In 4th ECerS Conf., 2-6/10/95, Vol 2, Basic Science - Developments in processing of advanced ceramics - Part II. Riccione, Italy. 1995. p. 121-126