CN105548087A - Method for determining transmittance of plate glass - Google Patents
Method for determining transmittance of plate glass Download PDFInfo
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- CN105548087A CN105548087A CN201510980838.6A CN201510980838A CN105548087A CN 105548087 A CN105548087 A CN 105548087A CN 201510980838 A CN201510980838 A CN 201510980838A CN 105548087 A CN105548087 A CN 105548087A
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- glass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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Abstract
The invention discloses a method for determining the transmittance of plate glass and solves the problem of determining inaccuracy on the transmittance of the plate glass. The method for determining the transmittance of the plate glass comprises the following steps: thermally treating the plate glass to be determined for eliminating internal residual stress in the plate glass; cleaning the surface of the plate glass; determining the transmittance of the plate glass by adopting a glass transmittance tester to obtain the transmittance of the plate glass. The method has the advantages of simple operation, rapidness in determining and accurate determining result when determining the transmittance of the plate glass.
Description
Technical field
The present invention relates to glass properties and measure field, particularly relate to a kind of method of assay plate glass transmitance.
Background technology
In sheet glass industry, transmitance performance be the transparency of glass, it directly affects the display quality of downstream product.Wherein, the alkali-free glass substrate that press over system is produced, its surface is the Free Surface of glass, and defect is few, and transmitance is high, and be the best base plate material being applied to the display products such as LCD, the transmitance of this display product to alkali-free glass substrate has more strict requirement.
When transmitance generally refers to light by glass, because part luminous energy is by glass absorber, therefore the luminous energy through glass decreases, and the Beer-Lambert law that absorbs of material to light quantitatively illustrates, namely represents with formula T=I/I0, wherein T is transmitance, I0 is incident light total intensity, and I is through the light intensity after glass, and this law is applicable to visible ray, ultraviolet and infrared ray, also be applicable to solution, gas and homogeneous solid, but be only applicable to monochromatic light.After the principle of transmitance refers to glass absorber luminous energy, electronics in composition in some atom is excited, higher energy level (E2) is transitted to from lower energy level (E1), if when the energy difference of two energy levels (E2-E1) equals the energy of visible ray (wavelength is about 400-760nm), glass just presents color.If when the energy difference of two energy levels (E2-E1) is greater than the energy of visible ray, glass is generally colourless, and the light of different wave length has different colors, and the energy of its light quantum is not identical yet.
Existing method often carrys out the transmittance of assay plate glass according to above-mentioned law and principle, the production technology of this sheet glass is, glass metal is obtained through high-temperature fusion again by after each frit mixing, this glass metal obtains sheet glass semi-manufacture by certain forming method, these sheet glass semi-manufacture annealed technique obtain the sheet glass of finished product after sanding and polishing again.In the transmitance of the sheet glass measuring finished product, existing method occurs that the transmitance difference between glass sample is comparatively large often, the inaccurate problem of the transmitance recorded; Especially for the alkali-free glass substrate adopting press over system to produce, it is the basic material that preparation LCD shows product, measure the transmitance of this alkali-free glass substrate according to existing method, due to the transmitance out of true measured, production operation and the product quality of downstream product will be affected.
Summary of the invention
In view of this, embodiments provide a kind of method of assay plate glass transmitance, fundamental purpose be to provide a kind of can fast and the method for Accurate Determining sheet glass transmitance.
For achieving the above object, invention broadly provides following technical scheme:
On the one hand, embodiments provide a kind of method of assay plate glass transmitance, comprise the following steps:
Sheet glass to be measured is heat-treated, for eliminating the internal residual stress of described sheet glass;
Surface cleaning is carried out to described sheet glass;
Adopt the transmitance of glass transmission measurement instrument to described sheet glass to measure, obtain the transmitance of described sheet glass.
As preferably, described sheet glass is the alkali-free glass substrate adopting press over system to produce, and described alkali-free glass substrate is without calculus, bubble-free and without striped.
As preferably, the thickness of described alkali-free glass substrate is 0.5mm.
As preferably, described thermal treatment is: rise to 730 DEG C-750 DEG C and after being incubated 30min with the programming rate of 8 DEG C/min from room temperature, 550 DEG C are down to the cooling rate of 3 DEG C/min, 300 DEG C are down to from 550 DEG C again with the cooling rate of 4 DEG C/min, be down to 200 DEG C with the cooling rate of 5 DEG C/min from 300 DEG C again, finally naturally cool to room temperature from 200 DEG C.
As preferably, described glass transmission measurement instrument is ultraviolet-visible spectrophotometer.
Compared with prior art, the invention has the beneficial effects as follows:
There is inaccurate technical matters in the method that the present invention is directed to assay plate glass transmission rate, adopt and first sheet glass is heat-treated, after eliminating the internal residual stress of sheet glass and the inner structure of stable sheet glass, the technological means of sheet glass transmitance described in recycling glass transmission measurement Instrument measuring, simple to operate when reaching assay plate glass transmitance, measure fast, measurement result is accurate, meets actual requirement and can the technical purpose of Instructing manufacture operation.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with preferred embodiment, to according to the embodiment of the present patent application, technical scheme, feature and effect thereof, be described in detail as follows.Special characteristic, structure or feature in multiple embodiments in following explanation can be combined by any suitable form.
Embodiment
The production line producing alkali-free glass substrate from press over system is selected without calculus, bubble-free and the alkali-free glass substrate without defects such as stripeds;
Above-mentioned alkali-free glass substrate is sheared, obtains the alkali-free glass sample that 5 chip sizes are 45mm × 25mm × 0.5mm;
Above-mentioned alkali-free glass sample is heat-treated, 740 DEG C are risen to from room temperature with the programming rate of 8 DEG C/min, after insulation 30min, 550 DEG C are down to the cooling rate of 3 DEG C/min, be down to 300 DEG C with the cooling rate of 4 DEG C/min from 550 DEG C again, then be down to 200 DEG C with the cooling rate of 5 DEG C/min from 300 DEG C, finally naturally cool to room temperature from 200 DEG C, obtain 5 through heat treated alkali-free glass sample, respectively label 1#, 2#, 3#, 4# and 5#;
Take out alkali-free glass sample, dry for subsequent use with alcohol wipe glass surface;
Glass transmission measurement instrument selection Japan's Shimadzu ultraviolet-visible spectrophotometer (UV-2550), adopts above-mentioned testing tool to measure the transmitance of above-mentioned alkali-free glass sample;
First by above-mentioned testing tool start also preheating more than one hour, above-mentioned testing tool enters self-inspection state, and the complete bright rear testing tool process of self-test of its green light terminates; Testing tool carries out automatic zero set (AZS) process again and calibrates; After testing tool calibration, 5 alkali-free glass sample clean-cloth wiped clean are tested one by one;
First 1# alkali-free glass sample is put into the specimen holder of testing tool sample chamber, sample chamber is closed after mixing up position, the transmitance of operation instructions to 1# alkali-free glass sample according to ultraviolet-visible spectrophotometer testing tool is tested, and obtains the transmitance of 1# alkali-free glass sample and record;
Repeat above-mentioned steps, measure the transmitance of 2#, 3#, 4# and 5# alkali-free glass sample, finally get the mean value of measurement result, determination data is as shown in table 1.
Comparative example
The production line producing alkali-free glass substrate from press over system is selected without calculus, bubble-free and the alkali-free glass substrate without defects such as stripeds; Above-mentioned alkali-free glass substrate is sheared, obtains the alkali-free glass sample that 5 chip sizes are 45mm × 25mm × 0.5mm, respectively label 6#, 7#, 8#, 9# and 10#;
Dry for subsequent use with alcohol wipe alkali-free glass sample surfaces;
Adopt Japanese Shimadzu ultraviolet-visible spectrophotometer (UV-2550) to measure the transmitance of alkali-free glass sample, concrete steps are identical with embodiment method of operating;
Repeat above-mentioned steps, measure the transmitance of 6#, 7#, 8#, 9# and 10# alkali-free glass sample, finally get the mean value of measurement result, determination data is as shown in table 2.
Table 1
Table 2
Known by the measurement result of table 1 and table 2, the 1# measured in the embodiment of the present invention, 2#, 3#, the transmitance of 4# and 5# alkali-free glass sample is respectively 92.21%, 92.20%, 92.18, 92.22% and 92.24%, the transmitance of above-mentioned five alkali-free glass samples is substantially close, difference is less, and without heat treated 6# in comparative example, 7#, 8#, the transmitance of 9# and 10# alkali-free glass sample is respectively 92.29%, 91.90%, 92.11, 92.27% and 90.16%, the transmitance data differences of five alkali-free glass samples of comparative example is larger relative to the data differences of embodiment, the mean transmissivity of the alkali-free glass sample of the embodiment of the present invention is 92.21%, and the mean transmissivity of the alkali-free glass sample of comparative example is 91.75%, the relative standard deviation of the alkali-free glass sample of the embodiment of the present invention is 0.024%, and the relative standard deviation of the alkali-free glass sample of comparative example is 0.981%, as seen from the above comparison, the relative standard deviation of the relative standard deviation relative contrast example of the transmitance that the method adopting the embodiment of the present invention to provide records is less, five groups of transmitances that the embodiment of the present invention records are in same level substantially, and five groups of transmitance value fluctuations that comparative example records are larger.
As known from the above, the transmitance that the method that the embodiment of the present invention provides measures alkali-free glass compares true and accurate, precision is higher, meet actual needs, this alkali-free glass is the basic material that preparation LCD shows product, and its transmitance measures accurately, has obtained the certification of downstream LCD producer, there is certain confidence level, and be conducive to production operation and the production quality control of downstream product.
The embodiment of the present invention determines the transmitance of alkali-free glass according to Beer-Lambert law and test philosophy, first alkali-free glass substrate is heat-treated, wherein, according to component and the inner structure thereof of alkali-free glass substrate, devise rational heat treatment cycle curve, by slow cooling, strict control cooling rate and temperature fall time, effectively eliminate the unrelieved stress of alkali-free glass substrate inside, stabilize the inner structure of alkali-free glass substrate further; Because before heat-treating, the internal microstructure of alkali-free glass substrate is in metastable condition, atom is in excited state, strong absorption can be there is to the light of incidence in light by interior atoms during alkali-free glass substrate, or show the degree of absorption of light uneven, measure transmitance result and just there will be the phenomenon showing instability fluctuated; And when alkali-free glass substrate is after bakingout process, the atom of alkali-free glass substrate inside is in ground state, the absorption intensity of the atom pair incident light in alkali-free glass substrate reduces, Stability Analysis of Structures; Therefore, the alkali-free glass substrate after bakingout process is even to the degree of absorption of incident light, and show transmitance measured value and stablize, deviation is little; So, adopt purple light-visible spectrophotometer to measure the transmitance comparatively science of this alkali-free glass substrate, measured result true and accurate in this case again.
The method that the embodiment of the present invention provides can be used for the mensuration of sheet glass transmitance, measuring principle and operation identical with the determination of light transmittance of alkali-free glass substrate.The embodiment of the present invention can expand to sheet glass for the determination object of transmittance, the production technology of the sheet glass of embodiment of the present invention indication is, glass metal is obtained through high-temperature fusion again by after each frit mixing, this glass metal obtains sheet glass semi-manufacture by certain forming method, these sheet glass semi-manufacture annealed technique obtain flat product glass after sanding and polishing again, namely the sheet glass of embodiment of the present invention indication is through the annealing operation of above-mentioned production technology.The present invention is only illustrated the inventive method for the transmitance measuring alkali-free glass substrate.The transmitance assay method of sheet glass of the present invention focuses on, and the sheet glass of mensuration needs first through bakingout process, and namely sheet glass is after its production technology melting-shaping-annealing, before assay plate glass transmitance, carried out again a thermal treatment; Wherein, process of thermal treatment curve can carry out respective design according to sheet glass kind, component and structure, to reach the object eliminated sheet glass internal residual stress and stablize its inner structure, recycling glass transmission measurement instrument carries out the mensuration of transmittance to the sheet glass that inner structure is comparatively stable.The inventive method have simple to operate, the test duration is short, the advantage that measurement result degree of accuracy is high, has important directive significance to the quality control of downstream product.
Do not use up part in the embodiment of the present invention, those skilled in the art all can select from prior art.
The specific embodiment of the present invention is only above; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of the claims.
Claims (5)
1. a method for assay plate glass transmitance, is characterized in that, comprises the following steps:
Sheet glass to be measured is heat-treated, for eliminating the internal residual stress of described sheet glass;
Surface cleaning is carried out to described sheet glass;
Adopt the transmitance of glass transmission measurement instrument to described sheet glass to measure, obtain the transmitance of described sheet glass.
2. the method for a kind of assay plate glass transmitance according to claim 1, is characterized in that, described sheet glass is the alkali-free glass substrate adopting press over system to produce, and described alkali-free glass substrate is without calculus, bubble-free and without striped.
3. the method for a kind of assay plate glass transmitance according to claim 2, is characterized in that, the thickness of described alkali-free glass substrate is 0.5mm.
4. the method for a kind of assay plate glass transmitance according to claim 1, it is characterized in that, described thermal treatment is: rise to 730 DEG C-750 DEG C and after being incubated 30min with the programming rate of 8 DEG C/min from room temperature, 550 DEG C are down to the cooling rate of 3 DEG C/min, 300 DEG C are down to from 550 DEG C again with the cooling rate of 4 DEG C/min, be down to 200 DEG C with the cooling rate of 5 DEG C/min from 300 DEG C again, finally naturally cool to room temperature from 200 DEG C.
5. the method for a kind of assay plate glass transmitance according to claim 1, is characterized in that, described glass transmission measurement instrument is ultraviolet-visible spectrophotometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510980838.6A CN105548087A (en) | 2015-12-23 | 2015-12-23 | Method for determining transmittance of plate glass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510980838.6A CN105548087A (en) | 2015-12-23 | 2015-12-23 | Method for determining transmittance of plate glass |
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| CN105548087A true CN105548087A (en) | 2016-05-04 |
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| CN201510980838.6A Pending CN105548087A (en) | 2015-12-23 | 2015-12-23 | Method for determining transmittance of plate glass |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117782823A (en) * | 2024-02-23 | 2024-03-29 | 易事特智能化系统集成有限公司 | Photovoltaic material detection equipment |
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| CN2525510Y (en) * | 2002-02-15 | 2002-12-11 | 燕山大学 | On-line monitor for visible light reflectivity and transmitivity of building glass |
| CN101186439A (en) * | 2007-12-05 | 2008-05-28 | 成都光明光电股份有限公司 | High-refraction high-dispersion phosphate optical glass and heat treating method thereof |
| CN102384900A (en) * | 2010-09-06 | 2012-03-21 | 信义超薄玻璃(东莞)有限公司 | Scatter plate and manufacture method thereof |
| CN103528998A (en) * | 2013-09-30 | 2014-01-22 | 湖南普照科技发展有限公司 | Measurement method for light transmittance of film-coated photovoltaic glass |
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2015
- 2015-12-23 CN CN201510980838.6A patent/CN105548087A/en active Pending
Patent Citations (4)
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| CN2525510Y (en) * | 2002-02-15 | 2002-12-11 | 燕山大学 | On-line monitor for visible light reflectivity and transmitivity of building glass |
| CN101186439A (en) * | 2007-12-05 | 2008-05-28 | 成都光明光电股份有限公司 | High-refraction high-dispersion phosphate optical glass and heat treating method thereof |
| CN102384900A (en) * | 2010-09-06 | 2012-03-21 | 信义超薄玻璃(东莞)有限公司 | Scatter plate and manufacture method thereof |
| CN103528998A (en) * | 2013-09-30 | 2014-01-22 | 湖南普照科技发展有限公司 | Measurement method for light transmittance of film-coated photovoltaic glass |
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| CN117782823A (en) * | 2024-02-23 | 2024-03-29 | 易事特智能化系统集成有限公司 | Photovoltaic material detection equipment |
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