The essence of laser heating is the energy conversion caused by the interaction between light energy and matter. When a high-energy laser beam irradiates the surface of an object, its unique monochromaticity (single wavelength) and high coherence make the photon energy highly concentrated, far exceeding that of ordinary light sources. The electrons on the surface of an object transition to a high-energy state by absorbing the energy of photons, and then transfer the energy to the lattice atoms through collisions, causing the atoms to vibrate violently (i.e., heat energy is generated). This process is manifested microscopically as an increase in material temperature and macroscopically as a controllable heating effect.
Example of key parameters
Wavelength matching: The electrode material has a high absorption rate for near-infrared lasers (such as 808/850/940nm), and the wavelength selection directly affects the heating efficiency.
Power density: The power of Lemon Photonics' industrial-grade Quanta Heat laser can reach over 20 kW, with an energy density exceeding 10-1000 W/cm², achieving millisecond-level instantaneous temperature rise.
Traditional heating relies on heat conduction, heat convection or heat radiation, while laser heating has pioneered a new model of direct deposition of directional energy, and its core belongs to the upgraded form of heat transfer by thermal radiation:
1.Millimeter-level precise positioning: The laser beam of Lemon Photon can be intelligently controlled, with energy directed towards the target area to prevent ineffective thermal diffusion.
2. Non-contact transfer: Energy is directly injected into the object through light radiation without the need for medium transfer, resulting in higher thermal efficiency.
3. Controllable depth: By adjusting laser parameters (such as optical power, pulse, and frequency), the depth of thermal penetration can be precisely controlled, allowing for flexible switching from surface modification to overall heating. It takes 10 minutes to heat steel to 800℃ in a traditional resistance furnace, while laser heating only takes 0.1 seconds. The energy utilization rate of traditional heat treatment is less than 30%, while that of laser heating can reach over 70%.
1. Precise microstructure regulation - Unlocking the limits of material performance
The ultrafast heating/cooling characteristics of lasers enable materials to break through the phase transition limitations in equilibrium. For instance, in the application of battery electrode coating and drying, for drying ovens of the same length, the laser drying solution of Lemon Photon has a drying efficiency that is 3 to 8 times higher than that of hot air drying (3 times for anode / 8 times for cathode).
2. Non-contact processing:
Zero mechanical stress: Avoids deformation caused by traditional forging and cutting, and the processing accuracy reaches ± 0.01mm.
The surface temperature of the laser is low (30-40℃) and it is isolated from flammable and explosive gases, making it suitable for environments with flammable and explosive positive electrodes.
3. Green and efficient
Energy-saving model: The energy consumption of the laser heating electrode is only half that of the air-heat drying, and the CO2 emission reduction is reduced by 50%.
Zero-pollution process: Replacing high-pollution technologies such as chemical carburizing and electroplating, the waste generation is reduced by 90%.
Precision manufacturing: In Micro-LED welding, laser technology significantly improves the yield rate with high precision and high speed. Meanwhile, it enhances product reliability by more than 40% by reducing thermal stress. The PCB drying process has achieved a dual improvement in efficiency and quality, with the deformation rate reduced by 35%.
In the new energy industry, in the production of photovoltaic cells, laser rapid scanning technology has increased the heating efficiency of perovskite coatings by 50%, effectively reducing the carbon footprint. The ink drying is precisely controlled at ±1℃, solving the problem of discoloration and peeling in traditional processes, and reducing the drying time by 40%.
Upgrading of traditional industries: In the papermaking drying process, laser energy is precisely zonal controlled, reducing energy consumption by 28% and the paper product damage rate by 30%. This technology also demonstrates breakthrough potential in fields such as medical health and electronic information, and is comprehensively promoting industrial upgrading from micro welding to macro material processing.
Laser heating technology, with its precise, efficient and clean characteristics, is reshaping the underlying logic of industrial manufacturing, medical health and electronic information. Whether it is the pursuit of zero-defect intelligent manufacturing or the exploration of the microscopic boundaries of life sciences, laser heating will become the core engine to break through the limits.
