YTTRIUM SULFATE OCTAHYDRATE
YTTRIUM SULFATE OCTAHYDRATE
CAS: 7446-33-5
Molecular Formula: H16O20S3Y2
YTTRIUM SULFATE OCTAHYDRATE - Names and Identifiers
YTTRIUM SULFATE OCTAHYDRATE - Physico-chemical Properties
| Molecular Formula | H16O20S3Y2 |
| Molar Mass | 610.12 |
| Density | 2.5g/mLat 25°C(lit.) |
| Water Solubility | Water solubility decreases with increasing temperature. Soluble in water. |
| Appearance | Crystalline |
| Specific Gravity | 2.558 |
| Color | White to pale yellow |
| Merck | 14,10107 |
| Use | Uses scientific research reagents, biochemical research |
YTTRIUM SULFATE OCTAHYDRATE - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 3 |
| TSCA | Yes |
YTTRIUM SULFATE OCTAHYDRATE - Sealing of Anodic Aluminum oxide film by yttrium sulfate pulse
From Titanium Academic
Author:
Chen Shuang , Zuo Yu , Zhao Xuhui , Liu Weihua
Summary:
The effect of yttrium sulfate pulse sealing on the thermal cracking behavior and electrochemical behavior of industrial pure aluminum anodic oxide film was studied. Scanning electron microscope (SEM) was used to observe the surface and cross-sectional morphology of anodic oxide film after boiling water sealing and yttrium salt pulse sealing. The electrochemical corrosion behavior of the two closed methods was studied by electrochemical impedance spectroscopy (EIS) and polarization curve. The results show that yttrium element can be introduced into the oxide film by yttrium sulfate pulse sealing. Compared with the thick cracks with a width of 1um on the surface of the boiling water-sealed oxide film, the surface layer of the yttrium sulfate-sealed oxide film is denser, the pore wall of the porous layer is thickened, the pores are reduced, and the microhardness of the oxide film is obviously improved, so that only some small microcracks appear in the oxide film after heating. From the AC impedance results, it can be seen that the heart value of the yttrium sulfate closed oxide film is 1.43 times that of the boiling water closed oxide film. The polarization curve results show that after yttrium salt closed, the self-corrosion potential of the oxide film is about 280mV higher than that of the boiling water closed sample, and the self-corrosion current density is reduced to the 0.41 of the boiling water closed sample. The corrosion resistance of the y
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keywords:
anodized film; yttrium sulfate; pulse sealing; heating; corrosion resistance
DOI:
CNKI:SUN:BMGC. 0.2009-01-020
cited:
Year:
2009
Last Update：2024-01-02 23:10:35
YTTRIUM SULFATE OCTAHYDRATE - Reference Information
| overview | yttrium sulfate-octahydrate chemical formula Y2(SO4)3 • 8H2O. Molecular weight 610.12. Pink monoclinic crystal. Relative density 2.558. Yttrium sulfate-octahydrate is insoluble in ethanol and alkali, soluble in water and concentrated sulfuric acid. Lost 8 molecules of water at 120 ℃. Decompose at 700 ℃. Yttrium sulfate anhydrous is white powder with 2.52 relative density. In a neutral aqueous solution of yttrium nitrate, or a solution of yttrium oxide dissolved in a small amount of dilute hydrochloric acid, add dilute sulfuric acid, after full stirring, add 95% ethanol to obtain octahydrate yttrium sulfate-octahydrate, and then heat the latter to 300~400 ℃ after dehydration to obtain anhydrous. |
| solubility in water (g/100ml) | dissolution grams per 100ml of water at different temperatures (℃): 8.05g/0 ℃;7.67g/10 ℃;7.3g/20 ℃;6.78g/30 ℃;6.09g/40 ℃ 4.44g/60 ℃;2.89g/80 ℃;2.2g/90 ℃ |
| use | scientific research reagents, biochemical research |
Last Update：2024-04-10 22:29:15
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