Glass with high efficiency of transmitting 290-305 nm ultraviolet rays and visible light and blocking other wavelengths of sunlight and application thereof

Abstract

The present application provides a kind of glass that efficiently transmits 290-305nm ultraviolet and visible light and blocks other wavelengths of sunlight, which is respectively a multi-component glass consisting of SiO2, B2O3, Na2O, ZnO, BaO, K2O, CaO and O3Sb2 doped with the rare earth element dysprosium, and a glass substrate made of SiO2, B2O3, Na2O, ZnO, BaO, K2O, CaO and O3Sb2 with a 0.2-0.5 μm dysprosium film layer. The glass prepared by the two methods has a light transmittance of 75-85% for 290-305nm ultraviolet light that promotes human vitamin D synthesis when the thickness is 1mm, and efficiently transmits visible light that has a nourishing effect on human skin and spirit, and largely blocks ultraviolet light that is harmful to the human body and infrared light that causes a sunburn, making it a glass that can be used for health care and well-being of the human body without the risk of sunburn and sunburn.

Description

Technical Field

[0001] The present invention belongs to the field of glass material preparation, and in particular relates to glass that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks sunlight of other wavelengths, and applications thereof. Background Art

[0002] Sunbathing promotes metabolism, enhances calcium and phosphorus absorption, stimulates vasodilation, increases blood flow, improves the nutritional status of skin and tissues, and enhances immunity, all of which contribute to health and slow aging. However, sunlight is composed of visible light (400-780nm), infrared (>780nm) with wavelengths longer than visible light, and ultraviolet (<400nm) with wavelengths shorter than visible light. Of all solar radiation, visible light accounts for approximately 50%, infrared for about 43%, and ultraviolet radiation for only about 7%. Ultraviolet radiation is further divided into far-ultraviolet (UVC) (wavelength 100-280nm), medium-wave ultraviolet (UVB) (wavelength 280-315nm), and long-wave ultraviolet (UVA) (wavelength 315-400nm).

[0003] Far-UVC is largely absorbed by the Earth's atmosphere, and the amount that reaches the ground is very weak, so it has no direct effect on the human body. However, medium-wave UVB and long-wave UVA, which reach the Earth's surface and reach the human body, have strong physiological and biochemical effects on the body. The 290-305nm band of medium-wave UVB plays a vital role in maintaining human health and supporting growth and development. Bone growth, vitamin D synthesis, and the prevention of anemia and tuberculosis all rely primarily on this wavelength. Less than 10% of the vitamin D in the human body comes from food; the majority comes from exposure to UV rays in this wavelength band. Therefore, this wavelength band is called the "health ray." Other wavelengths of medium-wave UVB and long-wave UVA, on the other hand, primarily cause harmful effects on the human body, including skin burns, sagging, aging, oxidative stress dermatitis, and even tumors and cancer. They can also cause vitreous opacities and cataracts, and weaken the immune system. This wavelength band is also known as the tanning band.

[0004] Because the visible light component of sunlight has less energy, aside from the blue light component that can cause skin pigmentation and influence the brain's circadian rhythm through the visual pathway, it has few adverse effects on the human body and primarily has beneficial effects, particularly on the skin. The infrared portion of sunlight primarily produces a warming effect on the human body. While far-infrared light (wavelength 4-14μm) is beneficial, high levels of near-infrared light (wavelength 780nm-1.5μm) and mid-infrared light (wavelength 1.5-4μm) can directly adversely affect the skin by increasing skin temperature, dilating capillaries, causing congestion, and increasing epidermal water evaporation. These effects primarily manifest as red papules, premature skin aging, and pigmentation disorders. Furthermore, these effects can lead to decreased vision and corneal ulcers.

[0005] Therefore, sunbathing directly in the sun is generally not recommended. Instead, it's best to use glass that blocks and attenuates the ultraviolet and infrared rays in sunlight. However, ordinary glass is largely impermeable to UVB and medium-wave ultraviolet rays, and only transmits long-wave ultraviolet rays (UVA) with a wavelength of 315 to 400 nm. As mentioned above, long-wave UVA affects melanin in the epidermis and is therefore also known as the tanning zone. Therefore, glass rooms constructed of ordinary glass not only fail to provide health benefits but can also have adverse effects. To this end, attempts have been made to develop glass that is translucent to UVB and medium-wave ultraviolet rays, such as invention patent CN202110160462.X, "Glass Transmitting Medium-Wave Ultraviolet Rays, Its Preparation Method, and Application," and the "High Refractive Index Ultraviolet-Transmitting Glass" reported in China Laser, Vol. A22, No. 9, 1995. However, while these glasses can transmit UVB, they indiscriminately transmit all UVB wavelengths, including the 280-290nm and 305-315nm UVB bands, which can cause skin burns, sagging, aging, tumors, and cancer. Furthermore, they offer little protection against UVA, the "tanning zone." Therefore, while such glasses can provide some beneficial UV radiation, the effects of other harmful UV rays are too strong, resulting in an effect comparable to sun exposure. To date, there have been no reports of glasses that selectively transmit only the beneficial 290-305nm ultraviolet and visible light at high rates, while largely blocking other harmful UVB and UVA wavelengths. Summary of the Invention

[0006] To overcome the shortcomings of the above-mentioned existing technologies, the purpose of the present invention is to provide a glass that efficiently transmits 290-305nm ultraviolet and visible light while largely blocking sunlight of other wavelengths. It can largely block harmful ultraviolet light bands and near- and mid-infrared rays, and convert harmful ultraviolet rays into beneficial visible light through the down-conversion effect.

[0007] The present invention also discloses an application of glass that can efficiently transmit 290-305nm ultraviolet rays and visible light and mostly block sunlight of other wavelengths.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] Solution 1: A glass that efficiently transmits 290-305nm ultraviolet and visible light and blocks sunlight of other wavelengths, wherein the composition of the glass comprises, by weight percentage:

[0010]

[0011] 以及掺杂0.5 -5mol%的稀土元素镝。

[0012] Furthermore, the glass blocks light with a wavelength shorter than 280 nm, has a transmittance of 20-30% for light with a wavelength of 280-290 nm, 80-90% for light with a wavelength of 290-305 nm, 25-35% for light with a wavelength of 305-400 nm, 80-90% for visible light with a wavelength of 400-780 nm, and 30-40% for infrared light with a wavelength of 790-2000 nm.

[0013] Solution 2: A glass that efficiently transmits 290-305nm ultraviolet and visible light and blocks sunlight of other wavelengths, comprising a glass substrate and a dysprosium film layer, and comprising the following steps:

[0014] (1) Prepare the glass substrate, wherein the composition of the glass substrate comprises, by weight percentage:

[0015]

[0016] (2) A dysprosium film layer is plated on the surface of the glass substrate prepared above.

[0017] Furthermore, the thickness of the dysprosium film layer is 0.2-0.5 μm.

[0018] Furthermore, the glass substrate plus the dysprosium film layer with a thickness of 0.2-0.5 μm basically blocks light with a wavelength shorter than 280 nm, has a transmittance of 20-30% for light with a wavelength of 280-290 nm, a transmittance of 75-85% for light with a wavelength of 290-305 nm, a transmittance of 20-30% for light with a wavelength of 305-400 nm, a transmittance of 85-93% for visible light with a wavelength of 400-780 nm, and a transmittance of 30-40% for infrared light with a wavelength of 790-2000 nm.

[0019] The invention relates to an application of glass that efficiently transmits 290-305nm ultraviolet rays and visible light and blocks sunlight of other wavelengths. The application can be applied to home glass windows, glass ceilings, outdoor swimming pool glass covers, sunbathing glass rooms, optical instruments and equipment, light-emitting devices, and medical devices that require ultraviolet treatment, which need to selectively transmit beneficial ultraviolet rays and visible light that can help the human body synthesize vitamin D and have health-care effects.

[0020] The present invention has the following advantages and beneficial effects compared to the prior art:

[0021] The health-preserving glass disclosed in this invention selectively transmits UVB (290-305nm), which plays a vital role in vitamin D synthesis in the human body, and visible light, which has a nourishing and healthy effect on both the mind and the skin. It largely blocks other harmful or adverse UVB and UVA rays, as well as near- and mid-wave infrared rays that can cause heat-induced skin dehydration, cracking, aging, and burns. Glass made with components such as boron trioxide, barium oxide, and silicon dioxide, according to the present invention, transmits UVB and UVA wavelengths greater than 285nm. Zinc oxide strongly absorbs UVB wavelengths between 300-400nm, while the rare earth element dysprosium converts UVB wavelengths between 330-460nm into visible light through a down-conversion effect. The combined action of zinc oxide and dysprosium largely blocks harmful UVB and UVA wavelengths between 305-400nm.

[0022] The rare earth element dysprosium has a down-conversion effect, which can convert harmful ultraviolet rays into visible light beneficial to human body, so that the visible light beneficial to human body from spirit to skin can be enhanced. The sunbathing with the health-care glass can produce good photobiological effect on human body. The selected 290-305 nm middle wave ultraviolet rays can promote vitamin D synthesis in human body, bone growth, prevention of anemia, tuberculosis, osteoporosis and softening, promote child development and growth, and prevent child rickets. The enhanced long wave visible light can promote blood circulation, strengthen the generation of immunoglobulin, stabilize and relax nerves, increase skin elasticity, and delay skin aging. Because harmful UVA and other ultraviolet rays are blocked, there is no tanning, and there is no need to worry about the carcinogenic effect of harmful ultraviolet rays. Moreover, because the near-infrared and middle-infrared rays are also greatly weakened, there is no dry heat caused by infrared heat, and there are no problems such as skin dryness, red papules, premature skin aging and pigment disorder caused by the infrared warm effect. The health-care glass can be widely used to prepare various sunbathing glass houses and be laid on the balcony, floor window and the like of a house, so that it becomes a powerful help for people, especially the old, pregnant women and children, to sunbathe, so that they can conveniently enjoy the sunbathing with beneficial ultraviolet rays to synthesize vitamin D, promote physical health, and at the same time, there is no need to worry about the harmful effects of the usual naked sunbathing, such as tanning, tanning, and tanning.

[0023] The health-care glass has the advantages of simple preparation method, easy operation, good chemical stability, not easy to oxidize and age, strong mechanical strength, simple structure, good stability, not easy to oxidize and age, and the like. It can be widely used in building sunbathing glass houses, home glass windows, glass ceilings, outdoor swimming pool glass covers (houses), and the like, and can also be used in related optical instruments and equipment requiring selective transmission of beneficial ultraviolet rays and visible light, medical devices requiring treatment with related specific ultraviolet rays, and light emitting devices emitting light of related specific wavelengths, and has a very good market development prospect. DETAILED DESCRIPTION

[0024] The invention purpose of the present application will be further described in detail in combination with specific embodiments. The embodiments cannot be described one by one here, but the implementation manner of the present application is not limited to the following embodiments.

[0025] Example 1

[0026] A glass doped with the rare earth element dysprosium effectively transmits 290-305nm ultraviolet and visible light while blocking sunlight of other wavelengths. The raw materials are weighed in the following weight percentages: SiO2 60.6%, B2O3 12.8%, Na2O 11.2%, ZnO 5%, BaO 5.6%, K2O 4%, CaO 0.6%, O3Sb2 0.4%, and then doped with 3 mol% of the rare earth element Dy via powder doping. 3+ .

[0027] After the raw material powders are fully mixed, the mixture is melted in a crucible at a temperature of 1200°C. The melt is then pressed into sheets or poured into a preheated copper mold to form glass products of various shapes.

[0028] The prepared dysprosium-doped multi-component glass, with a thickness of 1 mm, basically blocks light with a wavelength shorter than 280 nm, has a transmittance of 20-30% for light with a wavelength of 280-290 nm, 80-90% for light with a wavelength of 290-305 nm, 25-35% for light with a wavelength of 305-400 nm, 80-90% for visible light with a wavelength of 400-780 nm, and 30-40% for infrared light with a wavelength of 790-2000 nm. It is ideal for use in various sunbathing glass houses and installations on balconies, French windows, and other areas. Sunbathing allows users to receive an appropriate amount of 290-305nm ultraviolet light, which promotes vitamin D synthesis in the human body, as well as visible light, which is beneficial for both the skin and the mind. Without the worry of harmful UVB and UVA rays that can cause tanning or even skin cancer, it also significantly reduces the transmission of near- and mid-infrared radiation, minimizing sunburn. This allows for comfortable sunbathing and provides excellent bone and skin health benefits. It also helps prevent anemia, tuberculosis, osteoporosis, and softening, promotes growth and development in children, prevents rickets, helps boost immunity in pregnant women and the bone development of their fetuses, and provides a calming and relaxing effect. This glass, which allows sunlight to pass through it, offers health and wellness benefits.

[0029] Example 2

[0030] Adding Dy to the surface of multi-component glass substrate 3+ This glass, composed of a film layer, efficiently transmits 290-305nm ultraviolet and visible light while blocking sunlight of other wavelengths. The raw materials were weighed according to the following weight percentages: SiO2 61.6%, B2O3 12.8%, Na2O 10.2%, ZnO 5.4%, BaO 5.8%, K2O 3.2%, CaO 0.6%, and O3Sb2 0.4%.

[0031] The raw material powders are mixed thoroughly, preheated at 300°C for 20 minutes, then melted at 1200°C, and the melt is poured into a preheated copper mold and annealed at 400°C for 3 hours to form the glass substrate. Then, the glass substrate is coated with a layer of dysprosium powder by vacuum evaporation or oxygen partial pressure of 3x10 -2 Pa~6x10 -2 Pa, and annealed in air. The thickness of the film layer is 0.3 μm. The glass coated with the dysprosium film layer on the surface of the glass substrate has the following properties: the light with wavelength shorter than 280 nm is substantially blocked, the light with wavelength of 280-290 nm has a transmittance of 20-30%, the light with wavelength of 290-305 nm has a transmittance of 75-85%, the light with wavelength of 305-400 nm has a transmittance of 20-30%, the visible light with wavelength of 400-780 nm has a transmittance of 85-93%, and the infrared light with wavelength of 790-2000 nm has a transmittance of 30-40%. The glass can transmit the 290-305 nm ultraviolet light which is important for the synthesis of vitamin D in human body at a high transmittance, and absorb most of the 280-290 nm and 305-400 nm ultraviolet light in the UVB which is harmful to human body, and convert them into visible light such as red light and yellow light which are beneficial to human body, thereby enhancing the health care effect of the visible light on human body. The sunbathing glass made of the glass can provide good health care and health protection effects on human body.

[0032] The above detailed description is a preferred embodiment of the present application, and cannot limit the present application. Any changes or other equivalent replacement methods without departing from the technical scheme of the present application are included in the protection scope of the present application.

Claims

1. A glass that efficiently transmits 290-305 nm ultraviolet and visible light and blocks sunlight of other wavelengths, characterized in that: The composition of the glass is as follows by weight: SiO2 50-70%; B2O3 10-20%; Na2O 10-20%; ZnO 3-20%; BaO 5-10%; K2O 1-5%; CaO 0.1%-1%; O3Sb2 0.1%-1%; and doped with 0.5-5 mol% of the rare earth element dysprosium; The glass blocks light with a wavelength shorter than 280 nm, has a transmittance of 20-30% for light with a wavelength of 280-290 nm, 80-90% for light with a wavelength of 290-305 nm, 25-35% for light with a wavelength of 305-400 nm, 80-90% for visible light with a wavelength of 400-780 nm, and 30-40% for infrared light with a wavelength of 790-2000 nm.

2. A glass that efficiently transmits 290-305 nm ultraviolet and visible light and blocks sunlight of other wavelengths, characterized in that: The process consists of a glass substrate and a dysprosium film layer, and includes the following steps: (1) Prepare the glass substrate, the composition of the glass substrate is as follows by weight percentage: SiO2 50-70%; B2O3 10-20%; Na2O 10-20%; ZnO 3-20%; BaO 5-10%; K2O 1-5%; CaO 0.1%-1%; O3Sb2 0.1%-1%; (2) A dysprosium film layer is plated on the surface of the glass substrate prepared above, and the thickness of the dysprosium film layer is ; The glass blocks light with a wavelength shorter than 280 nm, has a transmittance of 20-30% for light with a wavelength of 280-290 nm, a transmittance of 75-85% for light with a wavelength of 290-305 nm, a transmittance of 20-30% for light with a wavelength of 305-400 nm, a transmittance of 85-93% for visible light with a wavelength of 400-780 nm, and a transmittance of 30-40% for infrared light with a wavelength of 790-2000 nm.

3. Use of the glass according to claim 1 or 2 that efficiently transmits 290-305 nm ultraviolet rays and visible light and blocks sunlight of other wavelengths, characterized in that: It can be applied to home glass windows, glass ceilings, outdoor swimming pool glass covers, sunbathing glass rooms, optical instruments and equipment, light-emitting devices, and medical devices that require ultraviolet light treatment, which need to selectively transmit beneficial ultraviolet rays and visible light that can help the human body synthesize vitamin D and have a health-care effect.

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