Synthesis and luminescent properties of Ca_8MgY(PO_4)_7:Re~(3+)(Re~(3+)=Eu~(3+),Ce~(3+),Tb~(3+)) phosphors
Why this work is in the frame
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Bibliographic record
Abstract
β-Ca3(PO4)2 structured Ca8MgY(PO4)7∶Re3+(Re3+=Eu3+,Ce3+,Tb3+)has been prepared by solid state method.The results of XRD,FT-IR,and TG-DSC characterization indicated that the optimum synthesis temperature was at 1 200℃.PL characterization indicated that under 252nm ultraviolet irradiation,Ca8MgY(PO4)7∶Eu3+ phosphor showed the characteristic emission of Eu3+,dominated by the emission at 612nm,which was ascribed to 5 D0-7 F2 transition of Eu3+,the optimum doping concentration of Eu3+ was 5.0mol%.Under 295nm ultraviolet irradiation,Ca8MgY(PO4)7∶Ce3+ phosphor showed a band emission with maximum at 363nm,which was originated from 5d1-4f1 transition of Ce3+,the optimum doping concentration of Ce3+ was 1.0mol%.Under the irradiation of ultraviolet at 228nm,the emission of Ca8MgY(PO4)7∶Tb3+ was dominated by blue emission ascribed to 5D3-7FJat lower doping concentration,while at higher concentration,the emission was dominated by green emission ascribed to 5D4-7FJ.This phenomenon was due to the crossing-relaxation of Tb3+.The optimum doping concentration of Tb3+ was 7.0mol%.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it