High-Purity Quartz Crystal Blank

High-purity quartz crystal blanks are semi-finished industrial materials used as the foundational substrate for manufacturing precision oscillators, resonators, and frequency control devices. These raw crystal materials undergo precision cutting, lapping, and metallization processes to become functional timing components in electronic systems. In B2B supply chains, they serve as critical upstream materials for electronics manufacturers producing quartz crystal units, filters, and sensors. Their consistent material properties ensure reliable frequency stability across temperature variations in final applications. The blanks are available in synthetic or natural quartz crystal forms, with key parameters including crystal cut angle (35°15' per IEC 60122), frequency tolerance (±10 ppm), Q-factor (≥1×10^6), impurity concentration (≤10 ppb per GB/T 3352), surface roughness (≤0.5 nm Ra per GB/T 1031), thickness variation (±0.01 μm per GB/T 3352), diameter (25.4–76.2 mm per SEMI M1), operating temperature (-40–85 °C per IEC 60068-2-14), resonant frequency (3–100 MHz per IEC 60122), and weight (0.5–5 g). These values are reference ranges for directory purposes and must be verified for specific models and applications. The blanks are typically supplied as wafers or individual pieces, and their suitability depends on the intended frequency, temperature range, and packaging requirements. Buyers should confirm material type, cut angle, and dimensional tolerances with the supplier. The product is not a finished component; it requires further processing such as electrode deposition and mounting. Maintenance signals include surface contamination or damage, which can affect performance. Failure boundaries include exceeding specified temperature limits or mechanical stress, which may cause fractures or frequency drift. Verification questions should address lot traceability, test reports, and compliance with applicable standards.

Quartz crystal blanks exhibit piezoelectric properties where mechanical stress generates electrical voltage and vice versa, enabling precise frequency oscillation when properly cut and electroded. The crystal lattice orientation, defined by the cut angle, determines the frequency-temperature characteristics. When an alternating electric field is applied across the blank, it vibrates at a resonant frequency determined by its dimensions and cut. The Q-factor indicates low energy loss, ensuring stable oscillation. The blanks are designed to operate within specified temperature ranges, and their frequency tolerance ensures minimal deviation from nominal values. The piezoelectric effect is fundamental to their function in timing and frequency control applications.