Automotive : How YAG-based converters enhance Adaptive Driving Beam technology ?

Adaptive Driving Beam (ADB) is a smart system that can automatically adjust the light distribution of the headlights according to the traffic conditions, such as the presence of oncoming vehicles or pedestrians. By creating a glare-free area around vehicles, ADB can provide optimal illumination at long distances for the driver without dazzling other road users, enhancing both safety and comfort at night.

ADB technology rely on perception systems that gather data, software controls that trigger an appropriate response, and advanced headlamp optics incorporating YAG converters to carry out the command.

Light conversion phosphors role in the solid-state lighting and ADB technology?

High power LED chip made with fine YAG powderThe light source is a key component for ABD, which is usually based on LED (light-emitting diode) technology and light changes are mainly controlled with a LED matrix design.

If LED have efficiency, long lifetime, low power consumption and fast response advantages over conventional halogen or xenon lamps, they also have color light rendering and thermal stability challenges. For high-power applications such as ADB, thermal stability and luminescent efficiency of phosphors can overcome these drawbacks.

Indeed, light conversion phosphors are materials that can absorb light of a certain wavelength (usually blue or near-ultraviolet) and re-emit light of a different wavelength (usually yellow or red). By combining the original and the converted light, white light with a desired color temperature and color rendering index can be obtained. The ideal color temperature for headlight should be close to the sunlight (around 5000K-6000K) in order to provide optimal visibility for human eyes.

One of the most widely used light conversion phosphors for white LEDs is YAG:Ce3+ (yttrium aluminum garnet doped with cerium ions) that efficiently convert blue into yellow light, resulting in a warm white light with a high luminous efficacy. By producing a high brightness and contrast ratio, it helps to create a clear and sharp image on the road.

Baikowski® high crystallinity, phasic and chemical purity submicronic YAG:Ce powder offers optimized particle size and distribution that allows the production of YAG-based converters with outstanding performances such as:

 🌟 High efficiency with minimal energy wasted as heat and high light-performance from the input source

🌟 A quick and accurate response to the input signal for precise adjustments.

🌟 Exceptional stability in both light color and brightness

Fully compatible with nanostructured blue diodes and various LED chip designs, our YAG nanophosphors enable device miniaturization.

Baikowski® submicronic YAG powders

Custom YAG-based converters for high-performance ADB lighting

By doping, enhanced performance of YAG:Ce3+ can be achieved. Here are some examples that could comply with your ADB lighting specification needs:

🌟 Color rendering: Doping YAG:Ce3+ with Tb3+ (terbium ions) allows a broader emission spectrum that improves the color rendering index of the white light.

🌟 Emissive properties and stability: the addition of gadolinium (Gd3+) ions as a codopant ensures consistent color and brightness

🌟 Quantum efficiency: Europium codoping can boost the quantum efficiency of the YAG:Ce phosphor, resulting in enhanced light output

Do not hesitate to contact our commercial and R&D teams for tailored YAG design.

 

The aerospace industry reshaped by oxide CMCs’ performance and sustainability

The exploration of combining ceramic matrices with reinforcing fibers has started in the 1980s with the aim of creating advanced material composites with high temperature resistance and lightweight properties.

It was primarily driven by the aerospace industry’s need to enhance the performance of vital components like turbine blades, thermal protection systems (TPS), structural elements, brakes and more, as well as to decrease fuel consumption.

High purity alumina (HPA) powderAs the aviation industry continues to shape the future and work towards decarbonization, Ceramic Matrix Composites (CMCs) play a crucial role and are experiencing fast growth.

Baikowski®, at the forefront of  high-performance Ox/Ox CMC material development, has actively contributed to this paradigm shift. These CMCs offer temperature stability, low density, hardness, wear resistance and above all, they are not sensitive to oxidation compare to other CMCs.

Moreover, thanks to constant innovation in decarbonizing our manufacturing processes, Baikowski® oxide solutions benefit from a comprehensive Life Cycle Assessment. This involves assessing the environmental impact at each stage of the material’s life cycle to promote the implementation of sustainable practices and a more eco-friendly supply chain.

See our 4N alumina & mullite solutions for CMCs

Ready-to-use and ready-to-press oxides

Ox/Ox CMC benefits for aero-engine applications

Combining oxide matrix with oxide fiber, such as alumina or mullite, results in better overall mechanical, physical and thermal properties. These CMCs offer reliable performance at temperatures up to 1,300°C, and no need for cooling air requirements, allowing the end products to be used in different aero-engine applications, such as combustion liners of gas turbine engines, heat shields and exhaust cones for example.

They have spurred innovation and efficiency in particular thanks to their :

CMC ceramic matrix composite on jet bladesMechanical strength

Ox/Ox CMCs’ mechanical strength proves advantageous in engine components subjected to mechanical stresses, such as combustion liners. Their robust nature ensures liners to withstand the intense forces and rapid temperature fluctuations associated with the combustion process.

Corrosion Resistance

Corrosion resistance is also a cornerstone in fortifying the structural integrity of critical parts and significantly extend the lifespan and reliability of aerospace components exposed to harsh atmospheric conditions.

Over the years, CMCs in general and Ox/Ox CMCs have found applications beyond the aerospace industry, demonstrating their versatility and performance advantages in various fields, including the automotive, energy, electronics, defense and medical sectors.

Baikowski® advanced 4N alumina & mullite solutions for Ox/Ox CMCs

Developing high quality Ox/Ox CMCs with superior performance properties for critical components required precise control over the characteristics of high purity alumina-based powders and slurries such as :

oxide polishing solutions🌟 A well-dispersed and stable slurry, which is crucial for achieving the desired microstructure and mechanical properties of the final CMC, requires a fine and uniform particle distribution powder (< 1μm).

🌟 An optimal viscosity guarantees the desired structural integrity of the component

🌟 A high sintering reactivity allows for control over porosity and ensures rapid and efficient densification. These factors, in turn, impact CMC’s mechanical strength and thermal properties.

🌟 A densification temperature kept as low as possible is determinant to preserve the structural and mechanical properties of the fibers and to ensure the overall stability of the CMC.

💡 Moreover, dopants can be added to improve specific characteristics, do not hesitate to contact us for tailor design. 💡

Among Baikowski® CMC offering, our SM8 powder and ready-to-use BA15-PSS slurry stand out. Additionally, we have innovatively created a mullite solution for a better compatibility with mullite fibers.

For a deeper dive into our advanced materials for oxide CMCs and insights into what is an outstanding matrix and how is a slurry formulated for an Ox/Ox CMC of high quality, explore our dedicated white paper 👇

Advanced Materials for oxide CMCs
white paper

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Advanced Materials for oxide CMC

How fine oxides & phosphors impact LED performance

LED technology: a sustainable lighting & display solution

LED chips

Light Emitting Diodes (LEDs) have revolutionized various industries, by providing energy-efficient solutions with less environmental impact than traditional lighting for a wide range of applications, including display screens, car displays and lightings, electronics and smart devices.

Thanks to to the direct conversion of electrical current into light (optical radiation) within the semiconductor material, LEDs exhibit this remarkable level of efficiency. However, a significant portion of the electrical power is also transformed into heat during the process.

High Purity Alumina, YAG & nanomaterials role in advanced LED technology

High purity alumina powder

High Purity Alumina (HPA) plays an essential role in producing the substrate, which serves as a foundation for the LED chip, affecting its overall performance, thermal management, and efficiency. Thanks to its exceptional ability to resist high temperatures, conduct heat efficiently, and insulate against electrical conductivity, LED lights can operate at their maximum potential.

As a highly efficient heat-dissipating component, High Purity Alumina (HPA) has contributed to the LED technology sustainability. Indeed, by maintaining LEDs at optimal temperatures, they maximize their performance and extends their operational lifespan, about 30,000 hours, equivalent to 6 hours of daily illumination for 12 years.

HPA has also influences the optical performance of LED lights, particularly in applications demanding color purity and accuracy. Its uniform crystal structure enhance light diffraction and color consistency in applications like display screens and specialized lighting.

Beyond HPA, Baikowski® also manufactures phosphors, used among other things for generating a broader spectrum of colors, such as its submicronic YAG product that offers a natural-looking white light. For instance, it is used in white LEDs and plasma display panels, as well as adaptive headlights to create different colors and intensities of light depending on the driving situation and the environment.

💡 As technology continues to evolve, Baikowski® finely-tuned oxides solutions and Mathym® advanced nanomaterials, that offer high crystallinity and controlled specific surface area, will have a role to play in the progress of emerging optics applications like mini-LED and micro-LED displays.💡

Integrating the superior performances of Mathym® nanoparticles, such as zilight®  into nanoscale structures or coatings, not only enables the miniaturization of optical devices, but also facilitates integration with other technologies, paving the way for the development of compact and multifunctional  LED lighting solutions.

🌟 Whether it’s LED lighting or cutting-edge displays, Baikowski® group is here to cater to your specific needs.🌟

View optics and photonics related products

Ceramic nanofillers

What is the purpose of ceramic nanofillers?

Nanofillers are nanoparticles of oxides embedded into a matrix of diverse materials (polymers, resins, metal…). The “classical” nanofillers are meant to lower the cost of a material by replacing a higher value material. Furthermore, ceramic nanofillers have the benefit of strengthen the physical properties of the matrix, namely its mechanical, optical or thermal properties.

Moreover, we’ll show here a new type of nanofillers, designed for high performance applications. We are talking about the agglomerate-free nanomaterial dispersions.

Properties of innovative ceramic nanofillers

The agglomerate-free nanomaterials dispersed in various media are bringing outstanding properties:

  • High solid loading
  • High transmittance
  • Low viscosity.

Mathym® and Baikowski® are producing several nanoparticles, which can be used as nanofillers. Here are some examples including high purity alumina (Al2O3) nano-dispersions, ceria (CeO2) and zirconia (ZrO2), as known as zilight® for Mathym:

Mathym Nanoparticles dispersed Al2O3, TiO2, CeO2, ZrO2

The nanoparticles are agglomerate-free and delivered as a suspension. They are also known as nano-dispersions. Well dispersed, these nanoparticles used as nanofillers are solving some paradoxes:

filyxio®, YbF3 nanoparticles Mathym

  • Radio-opacity / High transmittance, especially for the product YbF3 of Mathym, filyxio®
  • Low sintering temperature / High density of the ceramic
  • High refractive index / Low light scattering

Hence, the upper properties find their applications in several markets such as medical, technical ceramics, electronics, optronics…

Do you want to know more about our innovative ceramic nanofillers?

Discover Mathym® nanodispersions

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