Beijing Yuji Science and Technology Co. Ltd

Institute of Geographic Sciences and Natural Resources Research, Cas

Xiaoling Zhang

Bing Zhang

Haisong Wang

Jun Wan

Peng Bao

Jun Xia

Chundong Gao

Xiangyang Lin

Beili Fan

Shengli Zhen

Chuanglin Fang

The present disclosure relates to a networked ecological conservation water-saving system for urban mass green land, comprising 5-9 ecological conservation water-saving devices which are orderly arranged in the urban green land per square meter. The ecological conservation water-saving devices are arranged in a central symmetry manner. Each ecological conservation water-saving device comprises a columnar housing and an infiltrating irrigation unit. A first water storage unit is provided at the center of each infiltrating irrigation unit, and a second water storage unit is provided at the lower part of each first water storage unit. The networked ecological conservation water-saving system further comprises a first water delivery pipe network, a second water delivery pipe network, and a third water delivery pipe network.

Networked ecological conservation water-saving system for urban mass green land

The present invention relates to semiconductor field, especially relates to an oxynitride luminescent material, preparation method and its application. The oxynitride has a chemical formula of ABON:R, wherein A is one or more elements selected from the group consisting of Be, Mg, Ca, Sr, Ba, and Zn; B is one or more elements selected from the group consisting of Si, Ge, Zr, Ti, B, Al, Ga, In, Li, and Na, and at least contains Si. The oxynitride luminescent material according to the invention is excellent in chemical stability and luminescence property, and act as cyan to red luminescent material applicable to white light LED that excited by ultraviolet or blue light LED. Its excited wavelength is between 300-500 nm, while the emission wavelength at 470-700 nm. With blue or ultraviolet or near-ultraviolet LED, this type of material can be used to produce white light illumination or display light source.

Oxynitride luminescent material, preparation method and its applications

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Beijing, China

Xiaoling Zhang