Aluminum titanate

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Crystal structure
Pseudobrookit structure
__ Ti 4+      __ Al 3+      __ O 2−
Surname Aluminum titanate
other names
  • Tialit
  • ATI
Ratio formula Al 2 TiO 5
Brief description

White, creamy yellow or gray solid

External identifiers / databases
CAS number 12004-39-6
EC number 234-456-9
ECHA InfoCard 100.031.311
PubChem 16213786
Wikidata Q447805
Molar mass 181.83 g mol −1
Physical state



3.68 g cm −3

Melting point

1894 ° C

safety instructions
GHS labeling of hazardous substances
07 - Warning


H and P phrases H: 335
P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Aluminum titanate (or Tialit , ATI for short ) is an oxidic compound of aluminum and titanium from the group of titanates , which is important for the ceramics industry due to its special thermal properties, in particular low thermal expansion .

Extraction and presentation

Aluminum titanate can be made in several ways, for example:

By adding various additives (e.g. MgO), aluminum titanate can be stabilized, that is, the decomposition into corundum and rutile in the temperature range (900–1280) ° C is avoided.


Physical Properties

Aluminum titanate has a pseudobrookite structure with an orthorhombic base-face-centered unit cell . The space group is Cmcm (No. 63) . Template: room group / 63

Along the crystallographic axes there is a clear anisotropy in the thermal expansion, the mean thermal expansion is very low (about 5 · 10 −6 K −1 at 1000 ° C or, according to another source, 0.8 · 10 −6 K −1 , but without specifying the temperature). The coefficient of thermal expansion along the c-axis is negative.

The thermal conductivity is around 2 W / (m K) for aluminum titanate-based ceramics.

Chemical properties

Unstabilized aluminum titanate breaks down into corundum and rutile at higher temperatures. In the presence of silica , aluminum titanate can react to form mullite , corundum and rutile.


Due to its good thermal shock resistance and low thermal conductivity, aluminum titanate is used in the refractory industry. The strong anisotropy in the thermal expansion creates microcracks in the structure of titanium-based ceramics, which can further increase the resistance to temperature changes .

Individual evidence

  1. ^ Eberhard Roos, Karl Maile: Materials science for engineers: Fundamentals, application, testing . Gabler Wissenschaftsverlage 2011. ISBN 978-3-642-17463-6 , p. 307 ( limited preview in Google book search).
  2. ^ A b c H. Holleck: Material Selection for Hard Coatings . In: J. Vac. Sci. and Tech. A. 1986, 4, 6, pp. 2661-2669.
  3. a b Data sheet Aluminum titanate from Sigma-Aldrich , accessed on March 20, 2011 ( PDF ).
  4. a b J. Zabicki, G. Kimmel, J. Yaaran, L. Zevin: Thermal Anisotropy of Tialite (Al 2 TiO 5 ) by powder XRD. In: NanoStructured Materials. 1995, 6, pp. 675-678.
  5. M. Nagano, S. Nagashima, H. Maeda, A. Kato: Sintering behavior of Al 2 TiO 5 base ceramics and their thermal properties . In: Ceramics International. , 1999, 25, pp. 681-687.
  6. a b Y. Ohya, K. Hamano, Z. Nakagawa: Effects of some additives on microstructure and bending strength of aluminum titanate ceramic. In: Yogyo -kyokai-shi. 1986, 94, pp. 665-670.
  7. ^ AE Austin and CM Schwartz: The crystal structure of aluminum titanate . In: Acta Cryst. , 1953, 6, pp. 812-813, doi : 10.1107 / S0365110X53002374 .
  8. ^ A b R. J. Brook (Ed.), RW Cahn (Ex. Ed.), MB Bever (Sen. Adv. Ed.): Concise Encyclopedia of Advanced Ceramic Materials. 1st edition, Pergamon Press, 1991.

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