文档介绍：/ / 石英晶体的概念及常用参数 1 、概念石英晶体, 成分 SiO2, 它不仅是较好的光学材料而且是重要的压电材料, 晶体的主要特征是其原子或分子的有规律排列, 反映在宏观上是外形对称性。人造水晶在高温高压下结晶而成,在电场的作用下,晶体内部产生应力而形变, 从而产生机械振动获得特定的频率, 我们利用它的这种逆压电效应来制造石英晶体谐振器。 Quartz crystal, composition is SiO2, it is not only a good optical materials is important and piezoelectric materials, the main characteristic of crystal is the regular arrangement of atoms or molecules, is reflected in the macro appearance of symmetry. Artificial crystal crystal under high temperature and high pressure, under the action of electric field, the stress and deformation is generated in the crystal to produce mechanical vibration for a specific frequency, we use it to the inverse piezoelectric effect to manufacturing quartz crystal resonator. 2 、频率公差(FL) 在常温下参考点( 25℃) 中心频率的偏差值, 用最小值和最大值来定义,单位用百分( % )或百分比( ppm) Reference point at room temperature (25 ℃) center frequency deviation, with minimum and maximum to define, unit with / / percentage (%) or p