CN105293898A - Low-conductivity chromium-containing glass and founding method thereof - Google Patents

Low-conductivity chromium-containing glass and founding method thereof Download PDF

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Publication number
CN105293898A
CN105293898A CN201510618639.0A CN201510618639A CN105293898A CN 105293898 A CN105293898 A CN 105293898A CN 201510618639 A CN201510618639 A CN 201510618639A CN 105293898 A CN105293898 A CN 105293898A
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glass
sio
low conductivity
percent
nano
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白晓华
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Luoyang Institute of Science and Technology
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Luoyang Institute of Science and Technology
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Abstract

The invention relates to low-conductivity chromium-containing glass and a founding method thereof. The formula of the glass is composed of LiO2, SiO2, CaO, NaNO3 and Cr2O3, wherein the weight percent of each component is as follows: 0 to 20 percent of the LiO2, 55 percent to 81 percent of the SiO2, 0 to 33 percent of the CaO, 0.5 percent of the NaNO3 and 0.01 percent to 0.30 percent of the Cr2O3. Glass mixtures are mixed at a ratio and are added into a corundum crucible and the mixtures are uniformly melted at a temperature of 1480 DEG C to 1490 DEG C, and pouring melted glass liquid into a mold at 600 DEG C; putting the mold into a resistance furnace of 600 DEG C and annealing; naturally cooling the product to a room temperature to obtain a glass sample piece. The glass prepared by the formula and the method, provided by the invention, still has the characteristics of small conductivity and high light transmittance at high-temperature and high-humidity conditions; the glass has extremely good chemical stability, can meet the requirements on the glass by special instruments and has extremely great practicability.

Description

A kind of low conductivity is containing chromium glass and melting method thereof
Technical field
The present invention relates to Material Field, particularly glasswork field, especially a kind of low conductivity is containing chromium glass and melting method thereof.
Background technology
Glass used in specific apparatus instrument requires there is higher transmittance near visible light wave range 550nm, and has less specific conductivity under higher levels of humidity and temperature.The present invention is the special glass developed to meet above-mentioned requirements.The present invention passes through repeatedly melten glass and carries out method for measuring again, have developed a kind of artistic glass formula meeting above-mentioned requirements, and has founded out this glass.The maximum transmission rate of this glass, at 525nm-550nm, has less specific conductivity under hot and humid condition, and chemical stability meets this special needs completely.
Summary of the invention
The object of the invention is to, a kind of artistic glass formula is provided, the glass founded out is made to have higher transmittance near visible light wave range 550nm, and less specific conductivity is had under higher levels of humidity and temperature, there is good chemical stability, meet the particular requirement of glass used in specific apparatus instrument.
The object of the invention to solve the technical problems realizes by the following technical solutions.
A kind of low conductivity proposed according to the present invention is containing chromium glass, and wherein, this glass formula is by CaO, SiO 2, Li 2o, Cr 2o 3, NaNO 3composition, the weight percentage of each component is respectively: Li 2o0-20%, SiO 255%-81%, CaO0-33%, NaNO 30.5%, Cr 2o 30.01%-0.30%.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid a kind of low conductivity is containing chromium glass, and wherein, in this glass formula, the weight percentage of each component is respectively Li 2o9%, SiO 278.25%, CaO12%, NaNO 30.5%, Cr 2o 30.25%.
Aforesaid a kind of low conductivity is containing chromium glass, and wherein, in this glass formula, the weight percentage of each component is respectively Li 2o13.5%, SiO 273.75%, CaO12%, NaNO 30.5%, Cr 2o 30.25%.
Aforesaid a kind of low conductivity is containing chromium glass, and wherein, in this glass formula, the weight percentage of each component is respectively Li 2o13.5%, SiO 273.85%, CaO12%, NaNO 30.5%, Cr 2o 30.15%.
Aforesaid a kind of low conductivity contains chromium glass, wherein, and SiO 2introduce with silica sand, CaO Wingdale is introduced, Li 2o analytical pure Li 2cO 3introduce, Cr 2o 3use analytical pure K 2cr 2o 7introduce.
Above-mentioned a kind of low conductivity comprises the following steps containing the melting method of chromium glass:
(1) by the ratio of components of design, calculate the consumption of each component, take the Li of different mass 2cO 3, silica sand, Wingdale, NaNO 3, K 2cr 2o 7, make glass batch, mix;
(2) above-mentioned compound is put into corundum crucible, and the corundum crucible being placed with compound is put into SGM3816C chamber type electric resistance furnace found, glass melting temperature is 1480 DEG C-1490 DEG C, and melting time is 2 hours, makes the abundant melting of glass batch even;
(3) corundum crucible filling glass metal is taken out, rapidly glass metal is poured in the mould being preheated to 600 DEG C, mould is put into together with glass metal the resistance furnace that another temperature is 600 DEG C, annealing, closed furnace door, powered-down, makes glass metal naturally cool to room temperature, obtains various glass print.
Wherein, as Li in preparing glass charge 2when the weight percentage of O is less than 10%, in step (2), the glass melting temperature of resistance furnace is 1515 DEG C-1525 DEG C.
By technique scheme, a kind of low conductivity of the present invention can reach suitable technical progress and practicality containing chromium glass and melting method thereof, and the extensive utility value had in industry, compared with prior art have obvious advantage and beneficial effect, it at least has following advantages:
(1) method of the present invention is simply effective, with the glass sample that method of the present invention is founded, not only meet the demands completely in conductance, printing opacity, and (1485 DEG C) soaking time is longer under ultrahigh-temperature, make the chemical stability of glass fabulous, meet the working conditions under high-temperature high-humidity condition.
(2) with the glass sample that method of the present invention is founded, colour stable, can ensure there is larger transmittance near 550nm.
(3) glass of the present invention can reach effect in practical use really, more can meet the demand of user, can significantly promote its overall efficiency, thus more be suitable for practicality.
In sum, a kind of low conductivity of the present invention has significant progress technically containing chromium glass and melting method thereof, and has obvious positively effect, is really a new and innovative, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technique means of the present invention can be better understood, and can be implemented according to the content of specification sheets, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, be described in detail as follows.
Accompanying drawing explanation
Fig. 1. the transmittance of glass sample.
Embodiment
For further setting forth the present invention for the technique means reaching predetermined goal of the invention and take and effect, below in conjunction with preferred embodiment, to a kind of low conductivity proposed according to the present invention containing chromium glass and melting method thereof, its embodiment, structure, feature and effect thereof, be described in detail as follows.
The present invention devises rational technical recipe, then again by repeating to found test, the glass sample melted is carried out to the mensuration of transmittance and vitreous electricity conductance.
A kind of low conductivity of the present invention is as follows containing the specific embodiment of chromium glass and melting method thereof:
(1) first, the formula of design technology glass: preparing glass charge of the present invention is by CaO, SiO 2, Li 2o, Cr 2o 3, NaNO 3composition.The total mass of each component keeps 100g constant, and the mass conservation of maintenance total mass and wherein three components, changes the quality of all the other two components, and numbering represents with formulate glass sample.Such as, during following table 1 is tested, keep total mass to be that 100g is constant, only change Li 2o and SiO 2consumption, the mass conservation of all the other components.During following table 2 is tested, keep total mass to be that 100g is constant, only change Cr 2o 3and SiO 2consumption, the mass conservation of all the other components.Concrete mix designs is as table 1 and table 2.
Table 1. changes Li 2o and SiO 2consumption design proportion scheme
Table 2. changes Cr 2o 3and SiO 2consumption design proportion scheme
In above-mentioned batching, take total mass as 100g, SiO 2consumption can between 55g-81g; CaO consumption can between 0-33g; Li 2o consumption can between 0-20g; Cr 2o 3consumption can between 0.01g-0.30g; NaNO 3in 100g batching, keep 0.5g constant.
In actual mix designs, SiO 2introduce with silica sand, containing SiO in silica sand 298.25%; CaO introduces with Wingdale form, and wherein in Wingdale, the content of CaO is 53.72%; Li 2the pure Li of O 2cO 3introduce, Cr 2o 3use K 2cr 2o 7introduce.According to the proportion scheme of table 1 and table 2, by calculating, actual weigh batching scheme is as table 3.
The actual proportion scheme of table 3.
(2) secondly, fusion cast glass sample: by the proportion scheme in table 3, calculating composition, takes the silica sand of different mass, Li 2cO 3, Wingdale, NaNO 3, K 2cr 2o 7, make glass batch, putting into specification after mixing is that the corundum crucible of 200ml is founded.Carry out founding test with SGM3816C chamber type electric resistance furnace, glass melting temperature controls (to work as Li at 1485 ± 5 DEG C 2when O content is less than 10%, glass melting temperature need be increased to 1520 ± 5 DEG C), be incubated 2 hours at this temperature, make the abundant melting of glass batch even.Take out the corundum crucible filling glass metal to pour into rapidly in the circular die being preheated to 600 DEG C.Mould is put into together with glass sample the resistance furnace that another temperature is 600 DEG C, annealing.Closed furnace door, powered-down, makes glass sample naturally cool to room temperature, obtains various glass print.
(3) then, effect measuring is carried out to glass sample:
First conductance measurement is carried out to glass sample: the glass sample melted is cut, sample topography is made to be 5mm × 10mm × 10mm, the sample of well cutting is placed on watch-glass, instill two distilled water, lie in 100 DEG C of water-baths, be incubated 30 minutes at 100 DEG C after, measure glass sample under 1000 volts of voltage with DMG2670 numerical megger, measurement result is as shown in table 4.
Table 4. glass sample conductance measurement result
Temperature is 100 DEG C, humidity is under the condition of 100%, and the take off data as above table 4 of each glass sample specific conductivity, as can be seen from #1,2#, 3# data that sample is surveyed, the specific conductivity of glass is along with Li 2o content increases and increases.Li in glass 2o content is fewer, is more conducive to the specific conductivity reducing glass, but reduces Li in glass 2o content, the difficulty forming glass strengthens.As can be seen from 2#, 4#, 5# sample determination data, the Cr of trace 2o 3on the specific conductivity of glass without impact.
Secondly determination of light transmittance is carried out to glass sample: the mensuration of glass sample SP-1920 spectrophotometer being carried out to the curve of spectrum, result as shown in Figure 1.
As can be seen from Figure 1, in 2#, 4#, 5# sample, the position of maximum absorption band is near 550nm.Along with the increase of chromium content in glass, the transmittance of glass reduces successively, but the position of the position of absorption peak near 550nm does not change substantially.Clearly Cr 2o 3content can not be too high, and the transmittance that in Fig. 1,5# sample goes out at 550nm only has 20%, so require Cr in the present invention 2o 3content can not be greater than 0.30%.
A kind of low conductivity of the invention described above contains the technological innovation of chromium glass and melting method thereof, for technician of the same trade now, all have many saving graces, and the progressive that really possesses skills.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims (7)

1. low conductivity is containing a chromium glass, it is characterized in that this glass formula is by Li 2o, SiO 2, CaO, NaNO 3, Cr 2o 3composition, the weight percentage of each component is respectively: Li 2o0-20%, SiO 255%-81%, CaO0-33%, NaNO 30.5%, Cr 2o 30.01%-0.30%.
2. a kind of low conductivity according to claim 1 is containing chromium glass, it is characterized in that the weight percentage of each component in this glass formula is respectively Li 2o9%, SiO 278.25%, CaO12%, NaNO 30.5%, Cr 2o 30.25%.
3. a kind of low conductivity according to claim 1 is containing chromium glass, it is characterized in that the weight percentage of each component in this glass formula is respectively Li 2o13.5%, SiO 273.75%, CaO12%, NaNO 30.5%, Cr 2o 30.25%.
4. a kind of low conductivity according to claim 1 is containing chromium glass, it is characterized in that the weight percentage of each component in this glass formula is respectively Li 2o13.5%, SiO 273.85%, CaO12%, NaNO 30.5%, Cr 2o 30.15%.
5. a kind of low conductivity according to claim 1 is containing chromium glass, it is characterized in that SiO in the formula of this glass 2introduce with silica sand, CaO Wingdale is introduced, Li 2o analytical pure Li 2cO 3introduce, Cr 2o 3use analytical pure K 2cr 2o 7introduce.
6. low conductivity as claimed in claim 1 is containing a melting method for chromium glass, it is characterized in that it comprises the following steps:
(1) by the ratio of components of design, calculate the consumption of each component, take the Li of different mass 2cO 3, silica sand, Wingdale, NaNO 3, K 2cr 2o 7, make glass batch, mix;
(2) above-mentioned compound is put into corundum crucible, and the corundum crucible being placed with compound is put into resistance furnace found, glass melting temperature is 1480 DEG C-1490 DEG C, and melting time is 2 hours, makes the abundant melting of glass batch even;
(3) take out the corundum crucible filling glass metal, rapidly glass metal is poured in the mould being preheated to 600 DEG C, mould is put into together with glass metal the resistance furnace that another temperature is 600 DEG C, annealing, closed furnace door, powered-down, make glass metal be cooled to room temperature, obtain glass print.
7. a kind of low conductivity according to claim 6 is containing the melting method of chromium glass, it is characterized in that as Li in preparing glass charge 2when the weight percentage of O is less than 10%, in step (2), the glass melting temperature of resistance furnace is 1515 DEG C-1525 DEG C.
CN201510618639.0A 2015-09-24 2015-09-24 Low-conductivity chromium-containing glass and founding method thereof Pending CN105293898A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4687750A (en) * 1986-09-08 1987-08-18 Corning Glass Works Transparent glass-ceramics containing gahnite
JPH10330153A (en) * 1997-05-28 1998-12-15 Kyocera Corp Colored glass ceramic sintered compact
CN103395986A (en) * 2013-07-26 2013-11-20 洛阳理工学院 Manufacturing process of high-brightness chromium-containing glass
CN104108876A (en) * 2014-07-01 2014-10-22 洛阳理工学院 Lithium-toning manganese-containing colored glass and sintering method thereof
CN104936914A (en) * 2012-11-22 2015-09-23 欧罗克拉公司 Beta-quartz glass-ceramics with a controlled transmission curve and a high content of iron oxide and of tin oxide; articles in said glass-ceramics, precursor glasses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4687750A (en) * 1986-09-08 1987-08-18 Corning Glass Works Transparent glass-ceramics containing gahnite
JPH10330153A (en) * 1997-05-28 1998-12-15 Kyocera Corp Colored glass ceramic sintered compact
CN104936914A (en) * 2012-11-22 2015-09-23 欧罗克拉公司 Beta-quartz glass-ceramics with a controlled transmission curve and a high content of iron oxide and of tin oxide; articles in said glass-ceramics, precursor glasses
CN103395986A (en) * 2013-07-26 2013-11-20 洛阳理工学院 Manufacturing process of high-brightness chromium-containing glass
CN104108876A (en) * 2014-07-01 2014-10-22 洛阳理工学院 Lithium-toning manganese-containing colored glass and sintering method thereof

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