Synthesis of -Willemite Nanoparticles by Post-calcination of Flame-made Zinc Oxide/Silica Composites
Why this work is in the frame
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Bibliographic record
Abstract
Composite ZnO/SiO2 nanoparticles were made by flame spray pyrolysis (FSP). Characteristics of the product powder and its crystallization behavior on post-calcination were evaluated. Polyhedral aggregates of nano-sized primary particles consisting of ZnO nano-crystals 1–3 nm in size and amorphous SiO2 were obtained by FSP. A short residence time in the flame can result in the co-existence of the ZnO and SiO2 clusters without substitution or reaction hindering each other's grain growth. There was almost no change in the XRD pattern by calcination at 600 °C for 2 h, suggesting a high thermal stability of the ZnO nano-crystals in the composite particles. A pure α-willemite phase was obtained at 900 °C. At this calcination temperature, dC and dBET of the powder were 63 and 44 nm, respectively. The nano-composite structure of the FSP-made particles can suppress crystalline growth of ZnO during calcination to maintain a high reactivity of ZnO with SiO2, obtaining pure α-willemite with high specific surface area at low calcination temperatures.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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