Phase transformation in cordierite gel synthesized by non-hydrolytic sol–gel route
Source abstract
Abstract
Abstract Cordierite gel was synthesized by non-hydrolytic sol–gel route, starting from aluminum chloride, TEOS and magnesium chloride dissolved in absolute ethanol. Crystallization of μ-cordierite from gel at temperatures between 900 and 1000 °C was confirmed by differential thermal analyses, X-ray and FTIR spectroscopy. Higher calcination temperature resulted in the transformation of μ- to α-cordierite. The value of Avrami parameter n = 2.23 for the μ-cordierite crystallization indicates contribution of different simultaneous mechanisms: homogeneous nucleation and three-dimensional crystallite growth due to homogeneity of gel and surface crystallization due to submicron particles of the gel.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Calcium Carbonate Crystallization and Inhibition · X-ray Diffraction in Crystallography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Densification and crystallization behaviour of colloidal cordierite-type gels10.2298/JSC0105335P ↗
2. Preparation of alumina gels by a non-hydrolytic sol–gel processing method10.1016/0022-3093(94)90052-3 ↗
3. Preparation of anatase, brookite and rutile at low temperature by non-hydrolytic sol–gel methods10.1039/JM9960601925 ↗
4. Preparation of monolithic gels from silicon halides by a non-hydrolytic sol–gel process10.1016/S0022-3093(05)80505-8 ↗
5. Novel non-hydrolytic sol–gel route to metal oxides10.1007/BF00486208 ↗
6. Preparation of inorganic oxides via a non-hydrolytic sol–gel route10.1023/A:1008615708489 ↗
7. Effect of aging on nonhydrolytic alumina xerogels10.1023/A:1018306019878 ↗
8. Synthesis of nanostructured mullite from xerogel and aerogel obtained by non-hydrolytic sol–gel method10.1016/S0965-9773(99)00085-9 ↗
9. Monophasic pre-mullite gels prepared by a non-hydrolytic process10.1557/PROC-346-345 ↗
10. Mixed oxides SiO2–ZrO2 and SiO2–TiO2 by a non-hydrolytic sol–gel route10.1039/JM9960601665 ↗
11. A new polymorh of ZrW2O8 prepared using nonhydrolytic sol–gel chemistry10.1021/cm9805065 ↗
12. Non-hydrolytic sol–gel process: aluminium titanate gels10.1021/cm960405b ↗
13. Non-hydrolytic sol–gel process: zirconium titanate gels10.1039/a605168e ↗
14. Structural aspects of the lattice thermal expansion of hexagonal cordierite10.1111/j.1151-2916.1987.tb04954.x ↗
15. Depandance of the properties of cordierite-mullite ceramics on synthesis conditions
16. Glazes for cordierite ceramics
17. sol–gel processing for the synthesis of powders for dielectrics
18. Kaolin based cordierite for pollution control10.1016/S0955-2219(03)00269-3 ↗
19. Study on metal–MFI/cordierite as promising catalysts for selective catalytic reduction of nitric oxide by propane in excess oxygen10.1016/j.jcat.2004.08.016 ↗
20. Sol–gel processing of cordierite: effect of seeding and optimization of heat treatment10.1557/JMR.1990.1095 ↗
21. Crystallization behavior of alkoxy-derived cordierite gels10.1023/A:1025649406466 ↗
22. Crystallization kinetics and phase transformation characteristics in seeded monophasic cordierite gel10.1557/JMR.1991.2427 ↗
23. Applications of thermoanalytical techniques to the study of crystallization kinetics in glass-forming liquids, Part I. Theory10.1016/0022-3093(83)90069-8 ↗
24. The crystallization kinetics of a glass based on the cordierite composition studied by DTA and DSC10.1007/BF01178424 ↗
25. Kinetic study on crystallization of glass by differential scanning calorimetry
26. Synthesis and formation mechanism of submicrometre spherical cordierite powders by ultrasonic spray pyrolysis10.1023/A:1018595720313 ↗
27. Solution sol–gel synthesis of cordierite xerogels, aerogels and thin films10.1016/0167-577X(94)90044-2 ↗
28. Characterization and sintering of gels in the system MgO-Al2O3-SiO210.1016/S0955-2219(98)00199-X ↗
29. Preparation of cordierite ceramics from metal alkoxides (part 1): preparation and characterization of the powder10.2109/jcersj1950.95.1098_163 ↗
30. Nyquist · 1971
31. Phase-transformation kinetics in triphasic cordierite gel10.1557/JMR.2001.0068 ↗