1. Fatigue Challenges for "High-Frequency Short-Time" Synthesis (Fine Powder/RVD) For the synthesis of sawing-grade diamond fine powder, ultra-fine powder, and RVD single crystals, the process requires extremely short synthesis times.
High-Frequency Impact: The synthesis time for these materials is only 1/5 of that for medium-coarse grit, meaning the equipment usage frequency is 5 times higher within the same working period.
Structural Fracture Risk: This high-frequency alternating stress makes the hinge beams (especially the beam ears) highly prone to fatigue fracture.
Design Shortcomings: Current design methods mostly rely on basic finite element optimization and lack deep simulation for frequency, fatigue, and non-linear analysis (such as using Solidworks Simulation), making it difficult to accurately predict and solve structural hazards under high-frequency conditions.
2. Pressure Holding Challenges for "Long-Time" Synthesis (Large Single Crystals) When synthesizing gem-grade or industrial-grade large single crystals larger than 3mm, the process requires the equipment to maintain stable high pressure for a long time,.
Stroke Limitations: Traditional cubic presses mainly rely on a single-pressure source supercharger to maintain pressure. However, the plunger stroke of existing superchargers is limited and cannot meet the ultra-long pressure holding requirements.
Equipment Bottleneck: This forces existing equipment to be modified, such as replacing the traditional supercharger with ultra-high pressure oil pumps without stroke limits or reciprocating intensifiers; otherwise, the conditions for large single crystal synthesis cannot be met.
3. Temperature Control Challenges for "Phase-Change Sensitive" Materials (Composite Sheets) Unlike sawing-grade diamonds which are relatively stable during synthesis, materials like diamond composite sheets undergo significant physical state changes.
Non-Linear Changes: The material in the cavity transforms from solid to melt (phase change), causing volume changes, which in turn alter resistance and heat generation, ultimately leading to unstable cavity temperatures,.
Control Lag: Traditional electrical control systems often struggle to rapidly capture these subtle and fast fluctuations caused by phase changes. Existing technology lacks sufficient intelligent compensation capabilities to ensure the consistency and stability of the synthesized samples.
4. Cavity Challenges for "Extreme High Pressure" Needs As the demand for higher-grade materials increases, the traditional cubic press faces physical bottlenecks in pressure upper limits and cavity expansion.
Anvil Limits: The diameter of tungsten carbide anvils cannot be infinitely enlarged, limiting the size of the synthesis cavity and the upper pressure limit.
Structural Limitations: Compared to two-die (belt press) technology, the cubic press has limitations in generating ideal pressure and temperature fields. It requires transplanting the multi-layer annular mold structure of two-die presses or developing special 6-8 anvil devices to break through this technical ceiling.