-16.316.39β-quartz(瓷砖)stonewareα-quartz(nontensilestress)高岭土、长石、石英热膨胀系数:石英(quartz)~23×10-6K-1~3×10-6 K-1玻璃相(glassy phase)bQuartzFeldsparMulliteMS25μm10152025305035404555602e(Grades)Ceramics International 41 (2015) 13598-136066
stoneware(瓷砖) 高岭土、长石、石英 p 热膨胀系数:石英(quartz)~23×10-6 K-1 玻璃相(glassy phase) ~3×10-6 K-1 Ceramics International 41 (2015) 13598-13606 6
464 cm-l:bending vibration of theisolated SiO4(v2mode)motion of oxygen that bridges adjacent SiO4ba10um10umdQuartzZ()aFeldsparGlassymatrix10um20040060080010001200RamanShift(cm)
464 cm-1:bending vibration of the isolated SiO4 (ν2 mode) ,motion of oxygen that bridges adjacent SiO4 . 7
a470.5rel.1/cm自471.3红移至467.8cm-1拉应力的存在468rel.1/cm5umahI467.8cmTOFWHM=18.3cm470.7cmFWHM=.12.8cmQuartzihstoneware471.3cmFWHM=12.4cmQuartz.grainQuartzsinglecrystal500750250100012504204404604805005205408RamanShift(cm)RamanShift(cm)
自471.3红移至467.8 cm-1 -拉应力的存在 8
自中心到边界,显著红移aabCentreofgrain1,21,00.80,60.4re0,2Border470.5rel.0.042545047550024681012DistancefromparticleRamanShift(cm)center(μm)8μm468rel.1/cm9
自中心到边界,显著红移 9
SiO4倾斜(变形)-16.3°16.30COβ-quartzQuartzparticlea-quartz(nontensilestress)x-quartz(tensilestress)Fig.7.(a)Schema of theb-quartz structure around the (001)axe (angle=0°),(b)Schema of a-quartz structure (angle=±16.3°)around (001)axe and (c) Schemaof a-quartz structure deformation under non symmetric tensile forceat the border of the embedded quartz particle. (Structure adapted from [4o1)有研究报道称在压应力下,使Si-O-Si的键角由143.7°减小为134.2°瓷砖内部镶嵌的石英晶粒:在拉应力作用下,SiO.部分倾斜、部分不倾斜,致使拉曼峰峰形不对称10
SiO4倾斜(变形) p 有研究报道称在压应力下,使Si-O-Si的键角由 143.7º减小为134.2º p 瓷砖内部镶嵌的石英晶粒:在拉应力作用下, SiO4部分倾斜、部分不倾斜,致使拉曼峰峰形不对 称 10