Research Article
Synthesis, Characterization, and Thermal Decomposition of Pure and Dysprosium Doped Yttrium Phosphate System
Table 3
Results of thermal decomposition for different temperature ranges with observed and calculated weight loss in the following cases.
(a) Yttrium phosphate (YP) |
| Stage | Temperature (°C) | Decomposition steps
| Weight loss (%) | Observed | Calculated |
| First | 39–176 | YPO4·H2O → YPO4 + H2O | 7.9 | 8.9 | Second | 176–437 | 2[YPO4] → Y2O3 + P2O5(g) | 37 | 38.7 | Third | 437–706 | Y2O3 → YO + 0.5O2(g) | 6 | 7 |
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(b) Dysprosium doped yttrium phosphate (DyYP) |
| Stage | Temperature (°C) | Decomposition steps | Weight loss (%) | Observed | Calculated |
| First | 43–176 | Dy0.02Y0.98PO4·2H2O → Dy0.02Y0.98PO4 + 2H2O | 13.65 | 16.28 | Second | 176–519 | 3[Dy0.02Y0.98PO4] → (Dy0.02Y0.98)2P2O7 + PO3(g) + O2 | 19.04 | 19.95 |
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