August 03, 2021

Yttrium aluminum garnet series LED fluorescent materials have achieved important results

Recently, it was learned from Hefei University of Technology that the research team of the school has made important achievements in the yttrium aluminum garnet series LED fluorescent materials and their light color control mechanism, which provides an important means for further improving the performance of LED fluorescent materials.

High-power LED devices are widely used in home and outdoor public lighting. However, when LED lighting sources are used for a long time, brightness will appear and color drift will occur. Associate Professor Chen Lei and Professor Jiang Yang from the School of Materials Science and Engineering, Hefei University of Technology launched research on this issue. Through a series of experimental methods, combined with theoretical calculations, they gave a new explanation for the eigen mechanism of spectral red shift, intensity reduction and thermal stability deterioration caused by Gd ion substitution. Due to the large radius of Gd ions, the electron cloud extrusion deformation occurs in the rigid structure of yttrium aluminum garnet, which causes crystal field enhancement, electron effective mass reduction, electronic spreading level range expansion and band gap reduction, which leads to a decrease in luminous efficiency. Reduced with thermal stability. Recently, the research results were published in the journal Science Report of the British magazine Nature.

According to reports, this theory not only scientifically explains the luminescence phenomenon of yttrium aluminum garnet phosphor after Gd substitution, but also has important guiding significance for the development of new rigid structure fluorescent materials. “In the future, we can guide the development of artificial gemstone crystals with specific color, giving more colorful colors, such as various synthetic diamonds, sapphires and rubies. It not only exhibits high light transmittance and light reflectivity, but also can be customized to make it light. Eye-catching." Associate Professor Chen Lei introduced.

Micro Coreless Motor product introduction:

Micro Coreless Motor in structure broke through the traditional motor rotor structure, USES is no rotor, also called the hollow rotor cup type.Hollow cup motor with brush and brushless divides into two kinds, brush with hollow cup motor rotor iron core, without brush hollow cup motor stator iron core.Winding adopts delta connection.


Coreless Motor


Function:  fast speed, suitable for aircraft model, electric toothbrush,USB fan and other products.
Coreless Motor

Characteristic: the volume is 6MM 7MM fast.
Features: small size, fast speed, dc high speed motor starting voltage 0.6v is not possible for other motors.Wear shaking head, strong vibration feeling.

Coreless Motor


Operating temperature range:

Micro Coreless Motor should be used at a temperature of -10~60℃.

The figures stated in the catalog specifications are based on use at  ordinary room temperature catalog specifications re based on use at ordinary room temperature  (approximately20~25℃.

If a Micro Coreless Motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.


Storage temperature range:

Hollow cup motor should be stored ta a temperature of -15~65℃.

In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.


Service life:

The longevity of hollow cup motor is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.

●Use with a load that exceeds the rated torque

●Frequent starting

●Momentary reversals of turning direction

●Impact loads

●Long-term continuous operation

●Forced turning using the output shaft

●Use in which the permitted overhang load or the permitted thrust load is exceeded

●A pulse drive ,e.g.,a short break,counter electromotive force,PWM control

●Use of a voltage that is nonstandard as regards the rated voltage

●Use outside the prescribed temperature or relative-humidity range,or in a special environment.

●Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.


when it come to volume production,we're a major player as well .each month,we rurn out  600000 units,all of which are compliant  with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department  to service to you Looking forward to your inquiry. Welcome to our factory.

Coreless Motor

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