High-performance double-silver low-radiation energy-saving glass

Abstract

The invention discloses high-performance double-silver low-radiation energy-saving glass, which belongs to the field of an eco-friendly energy-saving building material. The structure of an energy-saving glass membrane layer comprises, in sequence, a glass substrate, a first base layer which is a silicon nitride layer, a second seed layer which is a zinc oxide layer, a third functional layer which is silver layer, a fourth protective layer which is a nickel cadmium layer, a fifth dielectric layer which is a silicon nitride layer, a sixth dielectric layer which is a tin zinc oxide layer, a seventh seed layer which is a zinc oxide layer, an eighth functional layer which is a silver layer, a ninth protective layer which is a nickel cadmium layer, a tenth dielectric layer which is an aluminum zinc oxide layer, an eleventh layer which is a silicon nitride layer, and a twelfth protective layer which is a graphite layer. Through arrangement of a coating membrane layer material on the glass substrate and arrangement of a membrane layer thickness, the energy-saving glass reflects gray and blue colors outdoors, and has visible light transmittance between 42-60%. The energy-saving glass is excellent in performance, has a shading coefficient less than 0.3 and selectivity coefficient more than 1.4, and is quite suitable for hot areas that have high environment temperature all the year round and intense average sunshine.

Description

technical field [0001] The invention relates to the field of environment-friendly and energy-saving building materials, in particular to a high-performance double-silver low-radiation energy-saving glass. Background technique [0002] Low-emissivity coated glass ("Low-E" glass) is a kind of coated glass with a high reflectance to infrared rays with a wavelength of 4.5-25um. This kind of coated glass has high light transmittance to visible light, which ensures indoor lighting, and has high reflectivity to far-infrared light, so as to prevent the glass from absorbing outdoor heat and then generating thermal radiation, which transmits heat into the room and indoor objects. The heat generated is reflected back to achieve the purpose of reducing the heat radiation passing through the glass. This reduces energy consumption for heating and cooling the building. [0003] The performance of Low-E glass is mainly measured by visible light transmittance, shading coefficient and selec...

AI Technical Summary

Problems solved by technology

[0004] The existing double-silver low-emissivity energy-saving glass, because it cannot be used after tempering, can not be used in the curved part of some buildings, which limits the use of the product to a certain extent; in addition, the double-silver low-emission energy-saving glass , can only cut and grind steel first and then coat it. Due to the different sizes of different engineering products, it is impossible to maximize the loading rate of the coating equipment during production, resulting in high energy consumption of the equipment; moreover, double silver that cannot be tempered Low-emissivity energy-saving glass can only be transported to the installation site after the original factory has completed the hollowing process, and the transportation cost is relatively high

[0005] Chinese patent applications CN202344955U and CN202671425U respectively disclose two kinds of toughened double-silver low-emissivity coated glass. Although both can meet the requirements of off-site processing and use, both belong to high-transparency toughened double-silver technology, and the visible light transmittance of the product is greater than 60%. , high-transparency products are generally suitable for northern cold regions, but not suitable for hot climate regions

In the published technical solutions, there is no temperable double-silver product with low transmittance and high-performance sunshade, and the outdoor reflection color is gray or blue-gray.

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