On the sintering kinetics of titania doped ceramic lanthanum chromite
- 31 Downloads
The sintering behaviour of lanthanum chromite with the addition of 1 to 3 wt% TiO2 was studied. Densification was examined as a function of sintering temperature and TiO2 concentration. The results showed that pure LaCrO3 could not be densified to >75% of the theoretical density, while the densities exceeding 90% of the theoretical were achieved with 3 wt% titania addition at 1600° C.
Metallographic study reveals a normal grain growth following the rate equationD 2−D 0 2 =kt. Activation energies both for densification and grain growth have been estimated to be ≈ (80±5) k cal/mole in case of 3 wt% TiO2 addition.
KeywordsActivation energy densification grain growth lanthanum chromite sintering kinetics
Unable to display preview. Download preview PDF.
- ASTM Designation 1971, C20-70 Parts13 6.Google Scholar
- Anderson H Uet al 1977, 13th Rare Earth Conf. Olgebay Park W. Vir, Oct. 16Google Scholar
- Anderson H U 1978 Processing of crystalline ceramics (New York: Plenum) 467–77Google Scholar
- Bansal K P, Kumari S, Das B K and Jain G C 1980 Communicated toTran. J. Brit. Ceram. Soc. Google Scholar
- George A M and Karkhanawala M D 1979 Symp. Sintering & Sintered Products BARC, Oct. 29–31Google Scholar
- Meadowcroft D B 1969Br. J. Appl. Phys. Ser. 2 1225Google Scholar
- Meadowcroft D B 1973 Conf. on Strontium Containing Compounds, Halifex, CanadaGoogle Scholar
- St. Jacques R G, Moise A and Yerouchalmi D 1974J. Canad. Ceram. Soc. 43 23Google Scholar
- Stuijts A L 1968 Ceramic Microstructures Chap. 19 (New York: John Wiley)Google Scholar