Skip to main content Accessibility help
×
Home
Hostname: page-component-888d5979f-22jsc Total loading time: 0.227 Render date: 2021-10-25T11:25:19.939Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": true, "newCiteModal": false, "newCitedByModal": true, "newEcommerce": true, "newUsageEvents": true }

Near-Stoichiometric Barium Titanate Synthesis by Low Temperature Hydrothermal Reaction

Published online by Cambridge University Press:  10 February 2011

Kyoungja Woo
Affiliation:
Clean Technology Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea, Kjwoo@kist.re.kr
Guang J. Choi
Affiliation:
Clean Technology Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea
Young S. Cho
Affiliation:
Clean Technology Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea
Get access

Abstract

Barium-deficiency of barium titanate particles prepared by low temperature hydrothermal reaction has been notorious. It has been believed that barium-deficiency is caused by the high solubility of barium source compared with titanium. Here is reported the synthesis of nearstoichiometric barium titanate powders with ultrafine particle size and high crystallinity by low temperature hydrothermal reaction from barium acetate and titanium tetra(methoxyethoxide). Barium titanate particles were synthesized in the spherical, metastable cubic crystalline grains with size distribution between 60 ∼ 90 nm in diameter. Ultrafine particle size was resulted from the control of the hydration rate and the decrease of Ti-O-Ti cross-linking extent of titanium precursor. Increasing barium to titanium molar ratio in reactant could not overcome the notorious barium-deficiency but, improved stoichiometry and produced finer and less agglomerated particles. Interestingly, adding a slight pressure to autogeneous one to make total 4 ∼ 10 atm has yielded near-stoichiometric, highly crystalline, and less agglomerated barium titanate particles. It seems like that the total pressure around 4 ∼ 10 atm provides strong force enough to push barium ions into the interstitial points of perovskite structure and stabilize it. These particles, which were in metastable cubic form as synthesized, initiated phasetransition to tetragonal form by calcination at 400 °C.

Type
Research Article
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Chaput, F., Boilot, J. P., Beauger, A., J. Am. Cer. Soc. 73, 942 (1990).CrossRefGoogle Scholar
2 Maurie, A.K., Buchanan, R. C., Ferroelectrics 74, 61 (1987).CrossRefGoogle Scholar
3 Vivekanadan, R., Philip, S., Kutty, T. R. N., Mater. Res. Bull. 22, 99 (1986).CrossRefGoogle Scholar
4 Blanco-Lopez, M.C., Rand, B., Riley, F. L., J. Eur. Cer. Soc. 17, 281 (1997).CrossRefGoogle Scholar
5 80°C, lhr, 0.20M was chosen as an optimal condition from our separate and unpublished result.Google Scholar
6 Choi, G.J., Lee, S. K., Woo, K., Koo, K. K., Cho, Y. S., Chem. Mater. 10, 4104 (1998).CrossRefGoogle Scholar
7 Ma, Y., Vileno, E., Suib, S. L., Dutta, P K., Chem. Mater. 9, 3023 (1998).CrossRefGoogle Scholar
8 Li, X., Shih, W. -H., J. Am. Cer. Soc. 80, 2844 (1997).CrossRefGoogle Scholar
9 Sharma, R.K., Chan, N. -H., Smyth, D. M., J. Am. Cer. Soc. 64, 448 (1981).CrossRefGoogle Scholar

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Near-Stoichiometric Barium Titanate Synthesis by Low Temperature Hydrothermal Reaction
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Near-Stoichiometric Barium Titanate Synthesis by Low Temperature Hydrothermal Reaction
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Near-Stoichiometric Barium Titanate Synthesis by Low Temperature Hydrothermal Reaction
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *