Effect of SiO2 crystal structure on the stability of polymer composites exposed to vacuum ultraviolet radiationCosmic radiationVacuum ultravioletSpacecraft coveringsDeep vacuumGas evolutionOptical characteristicsVacuum ultraviolet (VUV) radiation produced by the Sun in the space environment can cause degradation...
used in the manufacture of glass, abrasives, and cement, and also as a gemstone; the violet-purple variety is amethyst, the brown variety is cairngorm, the yellow variety is citrine, and the pink variety is rose quartz. Composition: silicon dioxide. Formula: SiO2. Crystal structure: ...
Quartz has this property as it has a complicated crystal structure with a low degree of symmetry.Piezoelectric materials such as quartz are used in transducers such as phonograph pickups, ultrasonic generators, buzzers, alarms, strain gauges and igniters in cookers....
Silica is highly crystallizable, melts of pure silica must be cooled very quickly to prevent crystallization. But Al2O3, and other oxides, disrupt the silicate hexagonal structure, making the glaze more resistant to crystallization.A high feldspar glaze is settling, running and crazing. What to ...
在第一性原理计算过程中,研究体系的稳定性是经常遇到的一个问题,我们可以从很多方面来解释,其中可以使用声子谱研究体系的动力学稳定性。 在固体理论中,声子是晶格振动的简正模能量量子,声子用来描述晶格的简谐振动。在量子力学中,固体内存在原子核之间的相互作用、电子间的相互作用还有原子核与电子间的相互作用。其中...
摘要针对日常家庭洗衣时深浅色衣物不能混洗及衣物在洗涤过程中掉落的染料易形成染料废水的问题,选用非织造布为基材,通过负载多孔二氧化硅(SiO₂)微球来制备洗衣防串染吸色片。设计防串染吸色片的组成结构,优化多孔SiO₂微球的质量浓度,观测制备所得防串染吸色...
ewald-summation madelung-constant crystal-structure coulomb-interactions sio2 al2o3 tio2 zns oxide-crystal-structures Updated Jun 27, 2017 C++ pibuxd / competitive-programming Star 1 Code Issues Pull requests My competitive programming and algorithmic stuff algorithms solutions competitive-programming...
the core–shell structure composed of SiC and SiO2can be observed. The crystal structure of the SiC core (Fig.2h) is further characterized using HRTEM and confirmed its 3C-SiC structure, corresponding to the (111) plane with a lattice spacing of 0.25 nm in the image (Fig. S3a) [36]....
(PLM) were employed to testify the effects ofSiO2nanofillers onthe crystallinity and crystal morphology of LDPE matrix. The trap energy level and density were tested by thermal stimulated current (TSC), combining the Weibull stati...
Crystal structureSemiconductor growthSurface oxidationX-ray diffractionA silicon dioxide film on a silicon substrate is the most essential element in semiconductor devices and various advanced materials. We have elucidated the atomic structure of SiO2films using low-dose scanning transmission electron ...