| 共沉淀法制备负热膨胀性ZrW2O8粉体及其粒径控制初探 |
| Synthesis and Primary Particle Size Control Study on Negative Thermal Expansion ZrW2O8 Powders Using Co-precipitation Method |
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| 摘要: |
| 关键词: 负热膨胀 ZrW2O8 共沉淀 |
| 基金项目: |
| Abstract: Negative thermal expansion (NTE) material ZrW2O8 powders were synthesized using co-precipitation route. The precursor of ZrW2O8 was studied by Thermogravimetric and differential scanning calorimetry (TG-DSC). The structure and morphology of the resulting powders were characterized by Powder X-ray diffraction (XRD) and Scanning electron microscopy (SEM), respectively. The results showed that the samples were single phase of α-ZrW2O8 with regular shape. High temperature X-ray diffraction measurement indicated that the thermal expansion coefficient of ZrW2O8 was -10.35 × 10-6 K-1 in the temperature range from room temperature to 150 ℃, -3.08 ×10-6 K-1 from 200 ℃ to 600 ℃ and the average value was -5.38 × 10-6 K-1. At the same time, polyethylene glycol (PEG) was used as dispersant to primary control the size of ZrW2O8. |
| Keywords: negative thermal expansion ZrW2O8 co-precipitation |
| 投稿时间：2005-02-22 修订日期：2005-05-11 |
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| 孙秀娟,杨娟,刘芹芹,程晓农.共沉淀法制备负热膨胀性ZrW2O8粉体及其粒径控制初探[J].无机化学学报,2005,21(9):1412-1416. |
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