Raman Scattering Spectra and Dielectric Relaxation Behavior of Pzt-Pzn-Pmnn Ceramics
Bibliographic record
Abstract
The 0.8Pb(Zr0.48Ti0.52)O3–0.125Pb(Zn1/3Nb2/3)O3–0.075Pb(Mn1/3Nb2/3)O3 + 0.7 wt% Li2CO3 + 0.3 wt% Fe2O3ceramics (PZT-PZN-PMnN) have been prepared by two-stage calcination method. The influences of sintering temperature on dielectric properties and Raman scattering in the PZT-PZN-PMnN relaxor ferroelectric ceramics have been investigated in detail. The dielectric studies showed that the degree of diffuseness (γ) increased with the increase of the sintering temperatures from 900 to 1000 °C, indicating that the dielectric relaxation behavior was increased; while at higher sintering temperature above 1000 °C, the γ decreased. The dielectric measurement results are in good agreement with the Raman scattering spectra analysis of the samples. It was found that the value of full wide of half maximum (FWHM) of silent B1+E mode reached the maximum value at the sintering temperature of 1000 oC, which showed similar trends to γ. At sintering temperature of 1000 oC, the highest dielectric constant (Emax) of 23600 and the γ value of 1.84.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".