摘要
用高温固相反应法制备了一种负热膨胀性材料 ,经X射线衍射分析证明为单一物相ZrW2 O8,进而确定了ZrW2 O8为简单立方晶系 .精化的晶胞参数a =0 .92 2 0 0nm ,计算了单位晶胞中含有的ZrW2 O8分子数目Z =4以及平均晶粒尺寸D =79nm、单位晶胞体积V =0 .78378nm3和比表面积S =1.4 9× 10 5cm2 /
A new material with special character of the negative thermal expansion was made from high temperature solid reaction. Some lattice parameters including the phases, crystal system, crystal size and specific surface were determined by X ray powder diffraction method. The results showed that the material was ZrW 2O 8 belonging to simple cubic system with a =0.922 00 nm, Z =4, D crystal size = 79 nm, S specific surface =1.49×10 5 cm 2/g.
出处
《南京师大学报（自然科学版）》
CAS
CSCD
2000年第1期56-59,共4页
Journal of Nanjing Normal University(Natural Science Edition)
基金
江苏省教育委员会自然科学基金
关键词
钨酸锆
晶胞参数
负热膨胀性材料
物相结构
Zirconium tungstate
negative thermal expansion
X ray powder diffraction
lattice parameters
crystal size
specific surface
