摘要
ZrW2O8是具有负热膨胀各向同性的化合物材料。本文使用ZrOCl2·8H2O,H2WO4,浓氨水为原料采用化学沉淀法制备ZrW2O8粉末。通过高温XRD,常温XRD、TG DSC等分析手段对产物结构进行表征,结果表明采用化学沉淀法在1150～1200℃短时间内(1h)可以生成单一ZrW2O8粉末。采用SEM技术分析了该粉末的形貌和尺寸。并对前驱体的高温转变过程进行了初步探讨。
The compound material ZrW2O8 displays special property of isotropic negative thermal expansion (NTE). The precursor of ZrW2O8 was prepared by using precipitation route, Which was heated at different temperature and showed the transformation process from the precursor to ZrW2O8 in heat treatment. The precursor of ZrW2O8 was studied by using thermogravimetric and differential scanning calorimeter (TG-DSC): and confirms the range of heat temperature. High temperature X-ray diffraction analysis of the precursor of ZrW2O8 shows the transformation process in heat treatment under 1000°C. After the heat treatment up to 1000°C and hardening the powder. X-ray diffraction analysis of the production shows that the purity of ZrW2O8 was high which was heated at 1150-1200°C for 1 hour. Scanning electron microscope (SEM) analysis shows micro-appearance and size of ZrW2O8 powder about 0.5 μm.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2004年第5期568-570,共3页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50372027)
江苏省基础研究计划(自然科学基金)资助项目(BK2003404)
关键词
ZRW2O8
沉淀法
高温转变
Calorimeters
Heat treatment
Precipitation (chemical)
Scanning electron microscopy
Thermal expansion
Thermogravimetric analysis
X ray diffraction analysis
