Black medium-wave ultraviolet ray transparent platinum group silicate glass and glass product

Abstract

The invention provides black platinum group silicate glass capable of transmitting medium-wave ultraviolet rays and a glass product. The platinum group silicate glass comprises the following components in percentage by weight: 65%-75% of SiO2, 1%-8% of B2O3, 2%-10% of CaO, 1%-5% of ZnO, 5%-13% of Na2O, 1%-10% of K2O, 0.1%-1% of TiO2, 0.1%-5% of NiO and 0.1%-2% of CoO. When the thickness of the prepared glass is 1mm, the transmittance of 300nm is 30%-60%; and the expansion coefficient at 20 DEG C to 200 DEG C is 80 * 10 <-7 > to 99 * 10 <-7 >. The black medium-wave ultraviolet ray-transmitting platinum group silicate glass has the advantages that UVB light can penetrate through the glass, and visible light cannot penetrate through the glass; the surface of the glass is free of air lines, the glass can be well sealed with Dumet wires or other platinum group glass in a fusion mode, and the medium-wave ultraviolet lamp is high in energy efficiency, good in sealing performance, long in service life and suitable for being used for manufacturing a moonlight lamp.

Description

Technical Field

[0001] The invention relates to the field of materials, and in particular to a black platinum group silicate glass transparent to medium-wave ultraviolet rays and a glass product. Background Art

[0002] Medium-wave ultraviolet rays with a wavelength of 280-320nm can promote mineral metabolism and the formation of vitamin D in humans and animals, enhance calcium absorption, and promote animal growth. For some nocturnal animals and plants, it is not desirable to allow visible light to pass through while supplementing medium-wave ultraviolet rays. Therefore, it is necessary to invent a glass that can pass medium-wave ultraviolet rays but not visible light. Summary of the invention

[0003] The purpose of the present invention is to provide a black medium-wave ultraviolet transparent platinum group silicate glass and glass products. The platinum group silicate glass of the present invention belongs to the platinum group glass in the electronic glass group. It can be well sealed with Dumet wire or other platinum group glasses, and there is no air line on the glass surface. The medium-wave ultraviolet lamp made of it has good energy efficiency, tight sealing, no slow air leakage, and extremely small attenuation. The platinum group silicate glass includes the following components in weight percentage:

[0004] SiO2 65%-75%,

[0005] B2O3 1%-8%,

[0006] CaO 2%-10%,

[0007] ZnO 1%-5%,

[0008] Na2O 5%-13%,

[0009] K2O 1%-10%,

[0010] TiO2 0.1%-1%.

[0011] NiO 0.1%-5%,

[0012] CoO 0.1%-2%.

[0013] Furthermore, the weight percentage of SiO2 in the platinum group silicate glass is 65%-71%.

[0014] Furthermore, the weight percentage of B2O3 in the platinum group silicate glass is 1%-7%.

[0015] Furthermore, the weight percentage of CaO in the platinum group silicate glass is 2%-8%.

[0016] Furthermore, the weight percentage of ZnO in the platinum group silicate glass is 2%-5%.

[0017] Furthermore, the weight percentage of Na2O in the platinum group silicate glass is 6%-13%.

[0018] Furthermore, the weight percentage of K2O in the platinum group silicate glass is 2%-9%.

[0019] Furthermore, the weight percentage of TiO2 in the platinum group silicate glass is 0.1%-0.8%.

[0020] Furthermore, the weight percentage of NiO+CoO in the platinum group silicate glass is 0.2%-5%.

[0021] The present invention also provides a glass product made of the black medium-wave ultraviolet-transmitting platinum group silicate glass, which includes but is not limited to at least any one of the following:

[0022] - Medium wave ultraviolet transparent glass tube;

[0023] - Medium wave UV-transmitting glass shell;

[0024] - Medium wave UV-transparent glass;

[0025] - Medium wave ultraviolet lamp;

[0026] - Medium wave ultraviolet light bulb;

[0027] - Medium wave ultraviolet lamp beads;

[0028] -Transmitted by medium wave ultraviolet light.

[0029] The beneficial effects of the present invention are: when the glass thickness is 1mm, the transmittance at 300nm is 30%-60%; the expansion coefficient at 20℃-200℃ is 80*10 -7 Up to 99*10 -7 ; At the same time, it does not transmit visible light. The glass surface has no air lines and can be well sealed with Dumet wire or other platinum group glasses. The produced medium-wave ultraviolet lamp (UVB lamp) has high energy efficiency, good sealing and long service life. In addition, the black medium-wave ultraviolet transparent platinum group silicate glass of the present invention can be used to make moonlight lamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a schematic diagram showing the relationship between the wavelength of medium-wave ultraviolet light and the transmittance of the 1 mm thick platinum group silicate glass of the present invention. DETAILED DESCRIPTION

[0031] The black medium-wave ultraviolet transparent platinum group silicate glass of the present invention is composed of the following components in weight percentage: SiO2 65%-75%, B2O3 1%-8%, CaO 2%-10%, ZnO 1%-5%, Na2O5%-13%, K2O 1%-10%, TiO2 0.1%-1%, NiO 0.1%-5%, and CoO 0.1%-2%.

[0032] The weight percentage of SiO2 in the black medium-wave ultraviolet transparent platinum silicate glass of the present invention is 65%-75%, preferably 65%-71%. SiO2 is the main body of silicate glass, and forms the skeleton of glass in the form of a network of silicon-oxygen tetrahedrons. When the content of SiO2 exceeds 75%, the glass is difficult to melt, and the melting temperature and melting time need to be increased, resulting in excessive energy consumption and reduced production efficiency, while also increasing the annealing temperature and softening temperature of the glass and reducing the expansion coefficient. Too little SiO2 will result in poor chemical stability of the glass.

[0033] Here, it should be noted that the glass in the present invention belongs to the platinum group glass in the electronic glass group and is mainly composed of silicate, so it is called platinum group silicate glass.

[0034] The black medium-wave ultraviolet transparent platinum silicate glass of the present invention contains B2O3, the weight percentage of which is 1%-8%, preferably 1%-7%. B2O3 fluxing reduces the viscosity of the glass and accelerates the clarification process. Too little B2O3 content will not work, while too much B2O3 will reduce the chemical stability of the glass.

[0035] The black medium-wave ultraviolet transparent platinum silicate glass of the present invention contains CaO, and its weight percentage is 2%-10%, preferably 2%-8%. CaO and other alkaline earth metal oxides can reduce the viscosity of the glass, promote melting, and improve the chemical stability of the glass. Too little CaO content will not work, and too much CaO will cause glass phase separation.

[0036] The black medium-wave ultraviolet transparent platinum silicate glass of the present invention contains ZnO, and its weight percentage is 1-5%, preferably 2%-5%. ZnO can significantly improve the chemical stability of glass, and can reduce the viscosity of glass and promote melting and clarification when used in combination with other alkaline earth metal oxides. Too little ZnO content will not work, and too much ZnO content will cause phase separation, devitrification and opacification of glass.

[0037] The black medium-wave ultraviolet transparent platinum group silicate glass of the present invention contains (Na2O+K2O), and its weight percentage is 6%-23%, preferably 8%-22%. The medium-wave ultraviolet transparent glass of the present invention includes Na2O 5%-13% and K2O 1%-10%. Na2O and K2O can significantly reduce the viscosity of the glass, promote glass melting, and are good fluxing agents. At the same time, they also determine the expansion coefficient of the glass to a large extent. Too little of their content will not work, and the expansion coefficient is too low. Too much of their content will reduce the chemical stability of the glass. The simultaneous introduction of Na2O and K2O has a double alkali effect, which can improve the chemical stability of the glass.

[0038] The black medium-wave ultraviolet transparent platinum silicate glass of the present invention contains TiO2, the weight percentage of which is 0.1%-1%, preferably 0.1%-0.8%. TiO2 in the present invention mainly plays the role of shielding short-wave ultraviolet rays and adjusting the peak value of medium waves.

[0039] The black medium-wave ultraviolet transparent platinum silicate glass of the present invention contains NiO+CoO, and the weight percentage thereof is 0.2%-7%, preferably 0.2%-5%. NiO+CoO mainly plays the role of shielding visible light.

[0040] A small amount of reducing agent and clarifying agent commonly used in glass production are used in the batch material of the platinum group silicate glass of the present invention.

[0041] Figure 1 The schematic diagram shows the relationship between the wavelength and transmittance of the medium-wave ultraviolet light of the 1 mm thick platinum group silicate glass of the present invention. When the glass is 1 mm thick, the transmittance at a wavelength of 300 nm is 30%-60%, and the expansion coefficient at 20°C-200°C is 80*10 -7 Up to 99*10 -7 ,from Figure 1 It can be seen that the platinum group silicate glass of the present invention has a very good transmittance to medium-wave ultraviolet rays and a very good suppression of visible light, that is, it is not transparent to visible light.

[0042] Table 1 below shows the expansion coefficient and transmittance of each component contained in the platinum group silicate glass of the present invention at different contents, wherein the transmittance is the transmittance at a glass thickness of 1 mm and a wavelength of 300 nm:

[0043] Table 1

[0044]

[0045]

[0046] It can be seen from the data of the embodiment shown in Table 1 that the platinum group silicate glass of the present invention does not contain elements such as lead, mercury, chromium, and cadmium, and complies with the EU RoHS standard. At the same time, the changes in the components contained in the platinum group silicate glass of the present invention will affect the changes in the expansion coefficient and transmittance of the glass.

[0047] It should be noted here that those skilled in the art should understand that the above embodiments are merely exemplary, and that various changes, substitutions and modifications may be made without departing from the spirit and scope of the present application to achieve the black medium-wave ultraviolet-transparent platinum group silicate glass required for making moonlight lamps.

Claims

1. A black platinum group silicate glass transparent to medium-wave ultraviolet light, characterized in that: Its composition by weight percentage includes: SiO2 65%-75%, B2O3 1%-8%, CaO 2%-10%, ZnO 1%-5%, Na2O 5%-13%, K2O 1%-10%, TiO2 0.1%-1%. NiO 0.1%-5%, CoO 0.1%-2%.

2. The platinum group silicate glass transparent to medium-wave ultraviolet rays according to claim 1, characterized in that: The weight percentage of SiO2 in the glass is 65%-71%.

3. The platinum group silicate glass transparent to medium-wave ultraviolet rays according to claim 1, characterized in that: The weight percentage of B2O3 in the glass is 1%-7%.

4. The platinum group silicate glass transparent to medium-wave ultraviolet rays according to claim 1, characterized in that: The weight percentage of CaO in the glass is 2%-8%.

5. The platinum group silicate glass transparent to medium-wave ultraviolet light according to claim 1, characterized in that: The weight percentage of ZnO in the glass is 2%-5%.

6. The platinum group silicate glass transparent to medium-wave ultraviolet light according to claim 1, characterized in that: The weight percentage of Na2O in the glass is 6%-13%.

7. The platinum group silicate glass transparent to medium-wave ultraviolet rays according to claim 1, characterized in that: The weight percentage of K2O in the glass is 2%-9%.

8. The platinum group silicate glass transparent to medium-wave ultraviolet light according to claim 1, characterized in that: The weight percentage of TiO2 in the glass is 0.1%-0.8%.

9. The platinum group silicate glass transparent to medium-wave ultraviolet rays according to claim 1, characterized in that: The weight percentage of NiO+CoO in the glass is 0.2%-5%.

10. A glass product made of the black medium-wave ultraviolet transparent platinum group silicate glass according to any one of claims 1 to 9, characterized in that: The glass product comprises at least one of the following: - Medium wave ultraviolet transparent glass tube; - Medium wave UV-transmitting glass shell; - Medium wave UV-transparent glass; - Medium wave ultraviolet lamp; - Medium wave ultraviolet light bulb; - Medium wave ultraviolet lamp beads; -Transmitted by medium wave ultraviolet light.

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