CN1020889C - Method for making low-expansion nucleated glass using low-grade kaolin as main raw material - Google Patents
Method for making low-expansion nucleated glass using low-grade kaolin as main raw material Download PDFInfo
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- CN1020889C CN1020889C CN 90107409 CN90107409A CN1020889C CN 1020889 C CN1020889 C CN 1020889C CN 90107409 CN90107409 CN 90107409 CN 90107409 A CN90107409 A CN 90107409A CN 1020889 C CN1020889 C CN 1020889C
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- 239000011521 glass Substances 0.000 title claims abstract description 43
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 title claims description 27
- 239000005995 Aluminium silicate Substances 0.000 title claims description 23
- 235000012211 aluminium silicate Nutrition 0.000 title claims description 23
- 238000000034 method Methods 0.000 title claims description 15
- 239000002994 raw material Substances 0.000 title description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000002241 glass-ceramic Substances 0.000 claims abstract description 24
- 239000011787 zinc oxide Substances 0.000 claims abstract description 18
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 13
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 13
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 13
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 13
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 12
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims abstract description 12
- 229910052808 lithium carbonate Inorganic materials 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000006004 Quartz sand Substances 0.000 claims abstract description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 32
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 17
- 238000002425 crystallisation Methods 0.000 claims description 14
- 230000008025 crystallization Effects 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 abstract description 7
- 230000008018 melting Effects 0.000 abstract description 7
- 239000004615 ingredient Substances 0.000 abstract description 4
- 235000019738 Limestone Nutrition 0.000 abstract 2
- 239000006028 limestone Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract 2
- -1 sodium fluorosilicate Chemical compound 0.000 abstract 2
- 238000005452 bending Methods 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 235000010755 mineral Nutrition 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 229910008556 Li2O—Al2O3—SiO2 Inorganic materials 0.000 description 4
- 229910052622 kaolinite Inorganic materials 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000006121 base glass Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910000174 eucryptite Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N Al2O Inorganic materials [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Glass Compositions (AREA)
Abstract
The present invention discloses low-expansion glass ceramic with lower grade kaoline as main material. The glass ceramic comprises the ingredients of the following proportion: 75 to 80 wt% of third class kaoline of Songyang in Zhejiang, 3 to 6 wt% of magnesite, 2 to 6 wt% of limestone, 0 to 5 wt% of quartz sand, 7 to 10 wt% of industrial lithium carbonate, 4 to 7 wt% of zinc oxide, 0.2 to 1.2 wt% of sodium fluorosilicate and 3 to 6 wt% of the total amount of titanium oxide and zirconium dioxide; otherwise, 65 to 71 wt% of third class kaoline of Songyang in Zhejiang, 10 to 20 wt% of magnesite, 2 to 6 wt% of limestone, 0 to 5 wt% of quartz sand, 7 to 10 wt% of industrial lithium carbonate, 1 to 3 wt% of zinc oxide, 0 to 0.5 wt% of sodium fluorosilicate and 3 to 6 wt% of the total amount of titanium oxide and zirconium dioxide. By adopting the glass ceramic of the present invention, glass melting temperature can be lowered, with energy saved; the lower grade kaoline with sufficient sources and low price can be used as the main material for reducing the cost.
Description
The present invention relates to the manufacture method of low-expansion glass-ceramic, especially relating to low-grade kaolin is the low-expansion glass-ceramic manufacture method of main raw material, and the low-expansion glass-ceramic thermal expansivity of being produced is low, and resistance to sudden heating is strong, the physical strength height.
Low-expansion glass-ceramic adopts Li usually
2O-Al
2O
3-SiO
2Or MgO-Al
2O
3-SiO
2System forms.1959 and nineteen sixty, U.S. Stookey S.D. has successively invented this two kinds of glass.Wherein, Li
2O-Al
2O
3-SiO
2System forms (wt%): Li
2O2-15, Al
2O
312-36, SiO
253-75, TiO
23-7, (Australia Patent NO.46230); Principal crystalline phase after the crystallization is: beta-eucryptite (Li
2OAl
2O
32SiO
2) or β-triphane (Li
2OAl
2O
34SiO
2).Admixtion is founded in about 1600 ℃ melting furnaces, mold temperature 1300-1500 ℃, handles through 700 ℃-800 ℃ or 1000-1100 ℃ of crystallization after the cooling again.MgO-Al
2O
3-SiO
2System forms (wt%): MgO8-32, Al
2O
39-35, SiO
240-70, TiO
27-15.Principal crystalline phase is violet cyanines stone (2MgO2Al
2O
35SiO
2), its glass melting temperature is higher than 1600 ℃, about 1200 ℃ of crystallization temperature.℃。Though these two kinds of low-expansion glass-ceramic can obtain low bulk, heat shock resistance and higher mechanical strength, and existing commodity, as the Prolyceram of the U.S., the ネ オ セ Off system-15 of Japan etc.But its common main drawback is, glass smelting temperature too high (〉=1600 ℃), energy consumption height and because of high temperature melting has aggravated the erosion of kiln refractory materials greatly, thus influenced kiln work-ing life and glass quality.Secondly, they all adopt purifying worker raw material, cost an arm and a leg.Simultaneously, the mold temperature of glass is narrow enclose narrow, thereby technological operation poor-performing, to forming and technology controlling and process requires harshness, otherwise, or devitrification in moulding process easily, or cause crystallization slow, heat treatment cycle lengthening etc.This is to have limited this class to have three main technique technical problems of the low-expansion glass-ceramic widespread use of excellent technical feature.
It is main raw material with the natural kaolin mineral that the object of the invention provides a kind of, and glass melting temperature is low, better technological operation performance is arranged, the manufacture method of low-expansion glass-ceramic with low cost
High grade kaolinite is a kind of clay mineral that important economic worth is arranged.At present, during world's kaolin industry utilized, about 80% was used for paper industry; 15% is used for ceramic industry; 5% is used for other department.There is abundant kaolin resource and widely distributed in China, and Jiangsu, Zhejiang, Fujian, Guangdong and Sichuan, Hunan etc. are economized outstanding many.But because during above-mentioned major industry uses, to kaolin grade and purity requirement height, paper industry more so, its Al
2O
3Content requirement generally needs through ore dressing, purifies and can meet the demands greater than 35%.Therefore, among the overwhelming majority, low-grade mineral or purification mine tailing, its Al
2O
3Content is lower than 25%, and except that part is made for the conventional ceramic raw material, directly industrial utilization and economic worth are low, demand urgently effectively fully utilizing and deep processing development.
The present invention is that the low-grade kaolin mineral of employing is a main raw material.Its chemical constitution (wt%) is: SiO
265-70, Al
2O
322-25, (Fe
2O
3+ TiO
2) 0.3-0.5, (K
2O+Na
2O+CaO+MgO)＜1.0, burning decrement 6-9.In general kaolin ore, this grade grade often accounts for significant proportion.As Songyang, Zhejiang kaolin, the average composition (wt%) of its three grades of soil is as follows: SiO
268.30, Al
2O
323.51, (Fl
2O
3+ TiO
2) 0.4, burning decrement 7.2.
The appropriate design glass ingredient, make it and directly to quote, low-grade kaolin (introducing amount 60-80%) also substitutes with a small amount of magnesite, Wingdale etc. and to produce corresponding purified feed stock that institute requires use at present both at home and abroad as main raw material, can need not or seldom quote quartz sand fully.Can effectively reduce glass glass melting temperature, improve technological operation performance, with low cost, also be simultaneously the adding increment deeply and effectively utilize of low-grade kaolin mineral to open up new approach.
Low-expansion glass-ceramic provided by the invention comprises two kinds: i.e. (I), and with beta-eucryptite (Li
2OAl
2O
32SiO
2) and β-triphane (Li
2OAl
2O
34SiO
2) be principal crystalline phase; (II) is with β-triphane and μ-violet cyanines stone (2MgO2Al
2O
35SiO
2) be low bulk, the high strength micro-crystalline glass of principal crystalline phase.
(weight %) formed in the batching expressivity of glass (I): the three grades of kaolin 75-80 in Songyang, magnesite 3-6, Wingdale 2-6, quartz sand 0-5, industrial lithium carbonate 7-10, zinc oxide 4-7, Sodium Silicofluoride 0.2-1.2, titanium oxide and zirconium white total amount 3-6.It consists of glass (I) accordingly: (SiO
2+ Al
2O
3) 80-85%, SiO
2/ Al
2O
3Than 2.5-3.0, Li
2O/Al
2O
3Than 0.15-0.30, Li
2O/MgO is than 1.0-3.0, F0.2-0.6%, among CaO, BaO, the ZnO at least two kinds, total amount 5-10%, (TiO
2+ ZrO
2)＞4.5%.Wherein, the batching expressivity is formed, with the three grades of kaolin 75-76 in Songyang, and magnesite 3-4, Wingdale 2.5-3.5, industrial lithium carbonate 8-9, zinc oxide 4-4.5, Sodium Silicofluoride 0.5-0.7, titanium oxide and zirconium white total amount 4.0-4.5 are good; Glass is formed, with (SiO
2+ Al
2O
3) 80-81%, SiO
2/ Al
2O
3Than 2.8-2.9, Li
2O/Al
2O
3Than 0.19-0.20, Li
2O/MgO is than 2.0-2.1, CaO1.9-2.0%, ZnO4.5-5.0%, F0.4-0.5%, ZrO
23.5-3.8%, TiO
21.8-2.0% is good.
Glass (I) can be founded at 1560 °-1570 ℃, general Li
2O-Al
2O
3-SiO
2Or MgO-Al
2O
3-SiO
2Be that low-expansion glass-ceramic has reduced by 30 °-40 ℃, save hear rate 15-20%, because adopting cheap low-grade kaolin is main raw material, cost reduces 15-20% base glass to be handled 1-2 hour through 630 ° of-650 ℃ of coring, handled 1-2 hour through 800 ° of-900 ℃ of crystallization again, it is brilliant promptly to obtain evenly whole folding, and its thermal expansivity change is in 8-15 * 10
-7/ ℃, bending strength is 120-180MPa, can suitably adjust glass ingredient, particularly ZrO
2/ TiO
2Ratio and nucleus crystallization are handled system and are regulated and control.
(weight %) formed in the batching expressivity of glass (II): the three grades of kaolin 65-71 in Songyang, magnesite 10-20, Wingdale 2-6, quartz sand 0-5, industrial lithium carbonate 7-10, zinc oxide 1-3, Sodium Silicofluoride 0-0.5, titanium oxide and zirconium white total amount 3-6.Its corresponding composition of glass (II) is: (SiO
2+ Al
2O
3) 75-80%, SiO
2/ Al
2O
3Than 2.5-3.5, Li
2O/Al
2O
3Than 0.2-0.3, Li
2O/MgO is than 0.4-1.0, and F0-0.2% has two kinds at least, total amount 2-5%, (TiO among CaO, BaO, the ZnO
2+ ZrO
2)＞4.5%.Wherein, the batching expressivity is formed, with the three grades of kaolin 70-71 in Songyang, and magnesite 11-12, Wingdale 2.5-3.5, industrial lithium carbonate 9-9.5, zinc oxide 1.5-2, titanium oxide and zirconium white total amount 4.5-5.0 are good; Glass is formed, with (SiO
2+ Al
2O
3) 79-80%, SiO
2/ Al
2O
3Than 2.9-3.0, Li
2O/Al
2O
3Than 0.2-0.25, Li
2O/MgO0.6-0.7, among CaO, BaO, the ZnO at least two kinds, total amount 3.5-4%, (ZrO
2+ TiO
2) 5.5-5.8% is good.
Glass (II) glass melting temperature is 1500-1520 ℃, more existing Li
2O-Al
2O
3-SiO
2Or MgO-Al
2O
3-SiO
2Be that low-expansion glass-ceramic has reduced by 80 °-100 ℃, can save hear rate 25-30%, owing to adopt cheap low-grade kaolin mineral as main raw material, cost reduces 15-20%.Base glass carries out coring in 2-4 hour at 620 °-630 ℃ to be handled, and handles 2-4 hour in 680 ° of-720 ℃ of crystallization subsequently, promptly obtains the brilliant devitrified glass of evenly whole folding, and its thermal expansivity change is in 8-20 * 10
-7/ ℃, bending strength is 120-170MPa.Li during heat treating regime and glass are formed
2O/MgO, Li
2O/Al
2O
3And TiO
2/ ZrO
2Ratio has the weight influence to the devitrified glass coefficient of expansion, obtains higher mechanical strength and then mainly relies in accurate selection and control nucleation temperature and crystallization and thermal treatment program.
Embodiment (I):
Consisting of of devitrified glass: (SiO
2+ Al
2O
3) 81%, SiO
2/ Al
2O
3Than 2.90, Li
2O/Al
2O
3Than 0.19, Li
2O/MgO is than 2.1, CaO1.9%, ZnO4.8%, F0.6%, ZrO
23.7%, TiO
21.9%.Form introducing (weight %) respectively, the three grades of kaolin 75.3 in Songyang, magnesite 3.6, Wingdale 3.0, industrial lithium carbonate 8.5, zinc oxide 4, Sodium Silicofluoride 1, zirconium white 3.0%, titanium oxide 1.7 by this.Admixtion mixes, and with corundum matter or quartz crucible, founds 10 hours in 1560 °-1570 ℃, can add in case of necessity to stir or shrend remelting 4-6 hour.Cast or compression moulding at 1350 °-1500 ℃ on demand.Through 550 ℃ of annealing 1-1.5 hour, annealing back glass was handled 1 hour in 645 ℃ of coring, was warming up to 900 ℃ of crystallization subsequently rapidly and handled 2 hours.Gained devitrified glass thermal expansivity is 8-15 * 10
-7/ ℃, bending strength is 170 ± 10MPa.
Embodiment (II):
Consisting of of devitrified glass: (SiO
2+ Al
2O
3) 79.2%, SiO
2/ Al
2O
3Than 2.90, Li
2O/Al
2O
3Than 0.23, Li
2O/MgO is than 0.69, CaO1.9%, ZnO1.9%, TiO
22.9%, ZrO
22.7%.Form three grades of kaolin 70.1 in introducing (weight %) Songyang respectively, magnesite 11.6, Wingdale 2.8, industrial lithium carbonate 9.3, zinc oxide 1.5, titanium oxide 2.4, zirconium white 2.2 by this.Admixtion mixes, and places corundum matter or quartz crucible, founds 8 hours in 1500 °-1510 ℃, can add in case of necessity to stir or shrend remelting 4 hours; Cast or compression moulding at 1300 °-1420 ℃, through 480 °-500 ℃ annealing 1 hour.Annealing back glass was handled 3-4 hour through 625 ° of-630 ℃ of coring, was warmed up to 710 ° of-720 ℃ of crystallization immediately rapidly and handled 2-3 hour, and thermal expansion coefficient of glass is 8-12 * 10 after the micritization
-7/ ℃, bending strength is 150-170MPa.
The present invention and existing Li2O-Al
2O
3-SiO
2Or MgO-Al2O
3-SiO
2Be that low-expansion glass-ceramic compares, have the following advantages:
1. the glass smelting temperature has reduced by 30 °-40 ℃ (glass (I)) and 90 °-100 ℃ (glass (II)) greatly reduces energy consumption, reduces the kiln refractory corrosion that Yin Gaowen causes.
2. can directly adopt the low-grade kaolinite ore thing is primary raw material, and the source is sufficient, and is cheap, reduced cost, opened up again the new application approach of low-grade kaolinite ore thing.
3. have better technological operation performance, forming process is not rolled over crystalline substance, and the crystallization and thermal treatment time is shorter, and can obtain uniformly whole folding crystalline substance.
4. have low bulk, high-intensity performance, its coefficient of expansion is 8-20 * 10-7/ ℃, bending strength is 150-180MPa. Can be by adjusting in addition regulation and control of glass coring, crystallization treatment conditions or glass ingredient.
Claims (6)
1, a kind of manufacture method of low-expansion glass-ceramic, it comprises preparing glass charge, founds, annealing, crystallization is handled, and it is characterized in that said preparing glass charge expressivity composition (weight %) is: the three grades of kaolin 75～80 in Songyang, magnesite 3～6, Wingdale 2～6, quartz sand 0～5, industrial lithium carbonate 7～10, zinc oxide 4～7, Sodium Silicofluoride 0.2～1.2, titanium oxide and zirconium white total amount 3～6, low-grade kaolinic Chemical Composition (wt%) is: SiO
265～70, Al
2O
322～25, (Fe
2O
3+ TiO
2) 0.3～0.5, (K
2O+Na
2O+CaO+MgO)＜1.0, burning decrement 6～9.
2, a kind of manufacture method of low-expansion glass-ceramic, it comprises preparing glass charge, founds moulding, annealing, crystallization is handled, and it is characterized in that said preparing glass charge expressivity composition (weight %) is: the three grades of kaolin 65～71 in Songyang, magnesite 10～20, Wingdale 2～6, quartz sand 0～5, industrial lithium carbonate 7～10, zinc oxide 1～3, Sodium Silicofluoride 0～0.5, titanium oxide and zirconium white total amount 3～6, low-grade kaolinic Chemical Composition (wt%) is: SiO
265～70, Al
2O
322～25, (Fe
2O
3+ TiO
2) 0.3～0.5, (K
2O+Na
2O+CaO+MgO)＜1.0, burning decrement 6～9.
3, the manufacture method of a kind of low-expansion glass-ceramic according to claim 1 is characterized in that low-expansion glass-ceramic consists of: (SiO
2+ Al
2O
3) 80～85%, SiO
2/ Al
2O
3Than 2.5～3.0, Li
2O/Al
2O
3Than 0.15～0.30, Li
2O/MgO is than 1.0～3.0, F0.2～0.6%, CaO, BaO, among the ZnO at least two kinds, total amount 5～10%, (TiO
2+ ZrO
2)＞4.5%.
4, the manufacture method of a kind of low-expansion glass-ceramic according to claim 2 is characterized in that low-expansion glass-ceramic consists of: (SiO
2+ Al
2O
3) 75～80%, SiO
2/ Al
2O
3Than 2.3～2.5, Li
2O/Al
2O
3Than 0.2～0.3, Li
2O/MgO is than 0.4～1.0, F0～0.2%, CaO, BaO, among the ZnO at least two kinds, total amount 2～5%, (TiO
2+ ZrO
2)＞4.5%.
5, according to the manufacture method of claim 1 or 3 described a kind of low-expansion glass-ceramic, it is characterized in that said preparing glass charge expressivity composition (weight %) is: the three grades of kaolin 75～76 in Songyang, magnesite 3～4, Wingdale 2.5～3.5, industrial lithium carbonate 8～9, zinc oxide 4～4.5, Sodium Silicofluoride 0.5～0.7, titanium oxide and zirconium white total amount 4.0～4.5, said low-expansion glass-ceramic consists of (SiO
2+ Al
2O
3) 80～81%, SiO
2/ Al
2O
3Than 2.8～2.9, Li
2O/Al
2O
3Than 0.19～0.20, Li
2O/MgO is than 2.0～2.1, CaO1.9～2.0%, ZnO4.5～5.0%, F0.4～0.5%, ZrO
23.5～3.7%, TiO
21.8～2.0%.
6, according to the manufacture method of claim 2 or 4 described a kind of low-expansion glass-ceramic, it is characterized in that said preparing glass charge expressivity composition (weight %) is: the three grades of kaolin 70～71 in Songyang, magnesite 11～12, Wingdale 2.5～3.5, industrial lithium carbonate 9～9.5, zinc oxide 1.5～2.0, titanium oxide and zirconium white total amount 4.5～5.0, said low-expansion glass-ceramic consists of (SiO
2+ Al
2O
3) 79～80%, SiO
2/ Al
2O
3Than 2.9～3.0, Li
2O/Al
2O
3Than 0.2～0.25, Li
2O/MgO is than 0.6～0.7, CaO, BaO, among the ZnO at least two kinds, total amount 3.5～4.0%, (ZrO
2+ TiO
2) 5.5～5.8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107409 CN1020889C (en) | 1990-08-30 | 1990-08-30 | Method for making low-expansion nucleated glass using low-grade kaolin as main raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107409 CN1020889C (en) | 1990-08-30 | 1990-08-30 | Method for making low-expansion nucleated glass using low-grade kaolin as main raw material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1049836A CN1049836A (en) | 1991-03-13 |
| CN1020889C true CN1020889C (en) | 1993-05-26 |
Family
ID=4880526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90107409 Expired - Fee Related CN1020889C (en) | 1990-08-30 | 1990-08-30 | Method for making low-expansion nucleated glass using low-grade kaolin as main raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020889C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103030289B (en) * | 2012-12-05 | 2016-04-20 | 毛庆云 | A kind of take kaolinite as devitrified glass of major ingredient and preparation method thereof |
| CN108249759A (en) * | 2018-04-19 | 2018-07-06 | 合肥钢骨玻璃制品有限公司 | A kind of resistance to compression foaming microcrystal glass plate and preparation method thereof |
| CN113336534B (en) * | 2021-06-28 | 2023-06-02 | 武汉理工大学 | Low-thermal expansion domestic ceramic without lithium mineral and preparation method thereof |
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1990
- 1990-08-30 CN CN 90107409 patent/CN1020889C/en not_active Expired - Fee Related
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