Abstract
By careful consideration of the physical and chemical effects responsible for striation defect formation during spin coating, it is possible to adjust a coating solution's recipe to prevent these coating defects from forming. In this paper we present a specific "case study" to illustrate a useful reformulation strategy. Aluminum titanate (Al2TiO5) coatings were made via sol-gel chemical processing. An early version of our sol-gel recipe resulted in coatings that were severely striated and therefore unacceptable for their desired application, even though they had formed the correct crystalline phase during subsequent firing. The present paper examines that specific sol-gel recipe and illustrates a protocol for improving the final coating flatness by selecting a solvent additive that can influence the surface forces during drying. Coatings deposited with the modified solution were smooth and free from striations. The coating morphology was characterized by optical surface profilometry and crystallinity by X-ray diffraction. The widely applicable theory of targeted formulation adjustments to help eliminate striations during spin coating is discussed in light of the current experiments.
| Original language | English |
|---|---|
| Pages (from-to) | 1488-1492 |
| Number of pages | 5 |
| Journal | Chemistry of Materials |
| Volume | 14 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2002 |
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ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)
Cite this
A case study in striation prevention by targeted formulation adjustment : Aluminum titanate sol-gel coatings. / Taylor, D. J.; Birnie, Dunbar P.
In: Chemistry of Materials, Vol. 14, No. 4, 2002, p. 1488-1492.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A case study in striation prevention by targeted formulation adjustment
T2 - Aluminum titanate sol-gel coatings
AU - Taylor, D. J.
AU - Birnie, Dunbar P
PY - 2002
Y1 - 2002
N2 - By careful consideration of the physical and chemical effects responsible for striation defect formation during spin coating, it is possible to adjust a coating solution's recipe to prevent these coating defects from forming. In this paper we present a specific "case study" to illustrate a useful reformulation strategy. Aluminum titanate (Al2TiO5) coatings were made via sol-gel chemical processing. An early version of our sol-gel recipe resulted in coatings that were severely striated and therefore unacceptable for their desired application, even though they had formed the correct crystalline phase during subsequent firing. The present paper examines that specific sol-gel recipe and illustrates a protocol for improving the final coating flatness by selecting a solvent additive that can influence the surface forces during drying. Coatings deposited with the modified solution were smooth and free from striations. The coating morphology was characterized by optical surface profilometry and crystallinity by X-ray diffraction. The widely applicable theory of targeted formulation adjustments to help eliminate striations during spin coating is discussed in light of the current experiments.
AB - By careful consideration of the physical and chemical effects responsible for striation defect formation during spin coating, it is possible to adjust a coating solution's recipe to prevent these coating defects from forming. In this paper we present a specific "case study" to illustrate a useful reformulation strategy. Aluminum titanate (Al2TiO5) coatings were made via sol-gel chemical processing. An early version of our sol-gel recipe resulted in coatings that were severely striated and therefore unacceptable for their desired application, even though they had formed the correct crystalline phase during subsequent firing. The present paper examines that specific sol-gel recipe and illustrates a protocol for improving the final coating flatness by selecting a solvent additive that can influence the surface forces during drying. Coatings deposited with the modified solution were smooth and free from striations. The coating morphology was characterized by optical surface profilometry and crystallinity by X-ray diffraction. The widely applicable theory of targeted formulation adjustments to help eliminate striations during spin coating is discussed in light of the current experiments.
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U2 - 10.1021/cm010192c
DO - 10.1021/cm010192c
M3 - Article
VL - 14
SP - 1488
EP - 1492
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 4
ER -