Synthesis and characterization of aluminum-yttrium perovskite powder using a co-precipitation technique
Bibliographic record
Abstract
In this research the solid solution YAlO3 perovskite powder (YAP) was successfully synthesized by co-precipitation route. Co-precipitation synthesis is simple and inexpensive method which capable to produced more homogeneous powders. In the first step, effect of various mineralizers on YAlO3 formation has been investigated, which resulted in decrease of the formation temperature down to 1200 °C. In the next step, effect of the pH in synthesis procedure and also calcination time and temperature has been studied. Later, the optimum condition for synthesis of single-phase YAP was determined. The obtained powders have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) as well as ICP analysis. Results show that the most appropriate mineralizer system for the formation of YAlO3 perovskite was NaF:MgF2:Li2CO3 (3:2:1 by weight). Additionally, orthorhombic YAP powders were successfully synthesized in pH=9. Calcination at 1200°C for 4 h was the best condition for preparation single phase Aluminum-Yttrium perovskite crystals.
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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 | 0.001 |
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".