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Three kinds of salt solutions including NaCl, CaCl 2 and MgCl 2 , were used to modify the expansion of vermiculite. X-ray diffraction results indicate that vermiculites have been successfully modified by salt solutions. The d (002) reflection spacings of Na-vermiculite, Ca-vermiculite and Mg-vermiculite corresponding to different salt solution modifications are 1.223nm, 1.474nm...
The coefficient of thermal expansion (COTE) of AlMgB 14 was measured by dilatometry and by high temperature X-ray diffraction using synchroton radiation. The COTE over the temperature range 298 K to 1373 K was determined to be 9x10 -6 K -1 , which is relatively close to the value of 8.3x10 -6 K -1 for pure B. The anisotropy of the COTE...
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