quartz alpha <-> beta phase transitionvolumetric strainmechanical damagemicrocracking-enhanced fluid flowmicrocracking-enhanced reactionrheologyThe α β phase transition in quartz is accompanied by relatively large, anisotropic changes in cell volume and elastic stiffness properties. Because quartz is among ...
2) α-βQuartz Transition 石英α-β相变 例句>> 3) α-β phase transformation α-β相变 1. The comparative test results show the densification and α-β phase transformation of Si 3N 4 ceramics in gas pressure sintering are delayed as compared with normal pressure sintering. 本文对在1400...
Quartz exists in two forms: (1) alpha-, orlow, quartz, which is stable up to 573 °C (1,063 °F), and (2) beta-, or high, quartz, stable above 573 °C. The two are closely related, with only small movements of theirconstituentatoms during the alpha-beta transition. The structure...
X-ray scattering/ neutron irradiationalpha-beta quartz phase transitiondiffuse X-ray scatteringBragg reflectionsMeasurements of diffuse X-ray scattering close to Bragg reflections, of lattice parameter changes and of glasslike, or amorphous, scattering from 卤-quartz single crystals after irradiation in ...
Molecular-dynamics study of the high-temperature elasticity of quartz above the alpha-beta phase transition - art. no. 024105 Kimizuka H, Kaburaki H, Kogure Y (2003) Molecular-dynamics study of the high-temperature elasticity of quartz above the α-β phase transition. Physical... H Kimizuka...
By determining the mode Gr眉neisen parameter, the resonant frequencies are predicted in the vicinity of the transition in quartz. This calculation is extended to low temperatures (down to about , and the resonant frequencies are predicted at low temperatures using the lattice parameter data for ...
The observed variation with temperature of certain phonon frequencies as the alpha - beta transition is approached can be qualitatively explained by the change in lattice geometry. 展开 DOI: 10.1088/0022-3719/9/21/011 被引量: 19 年份: 2001 ...
The infrared lattice bands which correspond to the A2 modes of alpha-quartz, are analyzed by means of the classical oscillator model. The observed dependence of the classical parameters on temperature allows to think that non-linear effects occur by approaching the alpha-->beta phase transition.DOI...
Alpha to Beta Transition in Germania Quartz and a Pressure‐Temperature Diagram for GeO2 The influence of forward-facing steps on laminar-turbulent transition is studied with both direct numerical simulation and linear stability theory. \\\(N\\\) -factor envelopes are calculated for inflow Mach ...
关键词: Resonant ultrasound spectroscopy resonant piezoelectric spectroscopy porosity SiO2-based materials alpha-beta phase transition piezoelectricity DOI: 10.2138/am-2015-5180CCBY 年份: 2015 收藏 引用 批量引用 报错 分享 全部来源 免费下载 求助全文 De Gruyter (全网免费下载) 国家科技图书文献中心 (权威...