摘要
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.
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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2005年第9期1412-1416,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.50372027)
江苏省自然科学基金资助项目(No.BK2003404)
关键词
负热膨胀
ZRW2O8
共沉淀
negative thermal expansion
ZrW2O8
co-precipitation
