CN105060862A - Hollow spheres for high-temperature oxide crystal growth thermal field and preparation method of hollow sphere - Google Patents
Hollow spheres for high-temperature oxide crystal growth thermal field and preparation method of hollow sphere Download PDFInfo
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- CN105060862A CN105060862A CN201510495056.3A CN201510495056A CN105060862A CN 105060862 A CN105060862 A CN 105060862A CN 201510495056 A CN201510495056 A CN 201510495056A CN 105060862 A CN105060862 A CN 105060862A
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- crystal growth
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- oxide crystal
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Abstract
The invention discloses hollow spheres for a high-temperature oxide crystal growth thermal field and a preparation method of the hollow spheres. The hollow spheres comprise components in parts by weight as follows: 70-99.4 parts of Al2O3 or ZrO2, 0.1-10 parts of SiO2 or TiO2, 0.5-20 parts of one of or a mixture of two or more of CaO, MgO and Cr2O3. The preparation method comprises steps of melting, gas blowing, cooling and screening. Composite component raw materials are prepared by introducing and mixing oxides with low melting points and high melting points according to requirements of the crystal growth thermal field; through matched introduction of the two oxides, the hollow spheres prepared through blowing have better strength and rigidity, can completely meet the requirements of the crystal growth thermal field and is long in service life and low in cost; argon serves as blowing gas and enables the hollow spheres to be filled with inert gas which cannot cause any influence on the crystal growth environment, the problem of melt pollution caused by introduction of air into the crystal growth environment due to breaking of the hollow spheres is solved fundamentally, and the quality of crystals can be effectively improved.
Description
Technical field
The invention discloses a kind of hollow ball growing warm field for high-temp oxide crystal, the invention also discloses a kind of hollow ball preparation method growing warm field for high-temp oxide crystal, the invention belongs to technical field of fire resistant material production.
Background technology
In high-temp oxide crystal growth, lagging material plays a part control temperature Gradient distribution, the temperature difference between isolation heating element and body of heater, and the selection of lagging material plays critical effect to crystal growth.Meanwhile, the handle control of environment of crystal growth is also particularly important, and each the tiny link in crystal growing process needs strict control, to reduce growing environment to the pollution of melt as far as possible.
In existing lagging material, hollow ball pottery has become a mark of lagging material technical progress, the advantage such as compare traditional tungsten, zirconia material has lightweight, thermal conductivity is low, warm field structured material is grown as high-temp oxide crystal, more stable, uniform crystal growth temperature-field can be formed, be easy to the crystalline material growing high-quality, more and more become the first-selected lagging material of high-temp oxide crystal growth at present.In actual applications, the alumina hollow ball matter prepared because adopting pure commercial alumina is crisp, and heat-shock resistance is poor, and in use hollow ball easily breakage occurs simultaneously, cause alumina hollow ball inner air to enter environment of crystal growth to pollute melt, directly affect crystal growth.
Summary of the invention
An object of the present invention overcomes the deficiencies in the prior art, provides a kind of a kind of hollow ball growing warm field for high-temp oxide crystal with better strength and toughness.
Another object of the present invention is to provide a kind of preparation method growing the hollow ball of warm field for high-temp oxide crystal.
According to technical scheme provided by the invention, described a kind of hollow ball growing warm field for high-temp oxide crystal comprises following component: the Al of 70 ~ 99.4 weight parts
2o
3or ZrO
2, the SiO of 0.1 ~ 10 weight part
2or TiO
2, CaO, MgO or Cr
2o
3middle a kind of, two kinds or two or more mixtures amount to 0.5 ~ 20 weight part.
A kind of preparation method growing the hollow ball of warm field for high-temp oxide crystal comprises the following steps:
A, by the Al of 70 ~ 99.4 weight parts
2o
3or ZrO
2, 0.1 ~ 10 weight part SiO
2or TiO
2with CaO, MgO or Cr
2o
3middle a kind of, two kinds or two or more mixtures amount to 0.5 ~ 20 weight part and join in smelting furnace;
B, by smelting furnace heating temperatures to 2500 ~ 3200 DEG C, mixture is melted;
After the fusing of c, mixture, smelting furnace being tilted, liquation is flowed out from converter nose, then open and be contained in the air pressure valve of smelting furnace blowing up ball nozzle, make to blow ball nozzle ejection argon gas and liquation is dispelled, after cooling, point obtaining the hollow ball that diameter is 0.2 ~ 5mm through sieving.
The described ball nozzle that blows is flat or round steel pipe, and this diameter of steel tube is 30 ~ 60mm.
The described ball nozzle that blows is arranged on 50 ~ 80mm place below converter nose, and blows ball nozzle and converter nose angle is 60 ~ 90 °.
The stream pressure of described argon gas is 6 ~ 12kg/c ㎡.
The present invention is directed to crystal growth temperature-field requirement introducing low melting point and mix obtained plural components raw material with refractory oxide, low melting point oxide can adjust liquation component and viscosity well in fusion process, and refractory oxide has better temperature tolerance, shock resistance, the hollow ball that both coordinate introducing that winding-up can be made to obtain has better strength and toughness, can meet crystal growth temperature-field requirement completely, simultaneously long service life, cost are low; Using argon gas as blast pass, hollow ball inside is made to wrap up the rare gas element that can not have any impact to environment of crystal growth, fundamentally solve the problem because damaged introducing air to the environment of crystal growth of hollow ball makes melt pollute, effectively can improve crystal mass.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
A kind of preparation method growing the hollow ball of warm field for high-temp oxide crystal of the present invention comprises the following steps:
A, by the Al of 70 weight parts
2o
3, 10 weight parts SiO
2join in smelting furnace with the MgO of 20 weight parts;
B, by smelting furnace heating temperatures to 3200 DEG C, mixture is melted;
After the fusing of c, mixture, smelting furnace is tilted, liquation is flowed out from converter nose, then open the air pressure valve being contained in smelting furnace blowing up ball nozzle, the diameter blowing ball nozzle is 30 ~ 60mm, and blowing ball nozzle is flat steel pipe, blow ball nozzle and be arranged on 50 ~ 80mm place below converter nose, and blow ball nozzle and converter nose angle is 60 ~ 90, make to blow ball nozzle ejection high speed argon gas and dispelled by liquation, argon stream pressure is 6 ~ 12kg/cm
2, after cooling, point obtain the hollow ball that diameter is 0.2 ~ 5mm through sieving.The tap density of this hollow ball is 0.88g/cm
3, 1500 DEG C of water-cooleds, three compressive strength retention are 88%, and fracture toughness property is 6.3MPa.m
1/2, this hollow ball comprises the Al of 70 weight parts
2o
3, 10 weight parts SiO
2with the MgO of 20 weight parts.
Embodiment 2
A kind of preparation method growing the hollow ball of warm field for high-temp oxide crystal of the present invention comprises the following steps:
A, by the ZrO of 99.4 weight parts
2, 0.1 weight part TiO
2, 0.2 weight part Cr
2o
3join in smelting furnace with the CaO of 0.3 weight part;
B, by smelting furnace heating temperatures to 2700 DEG C, mixture is melted;
After the fusing of c, mixture, smelting furnace is tilted, liquation is flowed out from converter nose, then open the air pressure valve being contained in smelting furnace blowing up ball nozzle, the diameter blowing ball nozzle is 30 ~ 60mm, and blowing ball nozzle is round steel pipe, blow ball nozzle and be arranged on 50 ~ 80mm place below converter nose, and blow ball nozzle and converter nose angle is 60 ~ 90, make to blow ball nozzle ejection high speed argon gas and dispelled by liquation, the stream pressure of argon gas is 6 ~ 12kg/cm
2, after cooling, point obtain the hollow ball that diameter is 0.2 ~ 5mm through sieving.The tap density of this hollow ball is 1.80g/cm
3, 1500 DEG C of water-cooleds, three compressive strength retention are 78%, and fracture toughness property is 5.7MPa.m
1/2, this hollow ball comprises the ZrO of 99.4 weight parts
2, 0.1 weight part TiO
2, 0.2 weight part Cr
2o
3with the CaO of 0.3 weight part.
Embodiment 3
A kind of preparation method growing the hollow ball of warm field for high-temp oxide crystal of the present invention comprises the following steps:
A, by the Al of 80 weight parts
2o
3, 5 weight parts TiO
2, the CaO of 5 weight parts, the Cr of 5 weight parts
2o
3join in smelting furnace with the MgO of 5 weight parts;
B, by smelting furnace heating temperatures to 2800 DEG C, mixture is melted;
After the fusing of c, mixture, smelting furnace is tilted, liquation is flowed out from converter nose, then open the air pressure valve being contained in smelting furnace blowing up ball nozzle, the diameter blowing ball nozzle is 30 ~ 60mm, and blowing ball nozzle is round steel pipe, blow ball nozzle and be arranged on 50 ~ 80mm place below converter nose, and blow ball nozzle and converter nose angle is 60 ~ 90, make to blow ball nozzle ejection high speed argon gas and dispelled by liquation, the stream pressure of argon gas is 6 ~ 12kg/cm
2, after cooling, point obtain the hollow ball that diameter is 0.2 ~ 5mm through sieving.The tap density of this hollow ball is 0.90g/cm
3, 1500 DEG C of water-cooleds, three compressive strength retention are 84%, and fracture toughness property is 5.8MPa.m
1/2, this hollow ball comprises the Al of 80 weight parts
2o
3, 5 weight parts TiO
2, the CaO of 5 weight parts, the Cr of 5 weight parts
2o
3with the MgO of 5 weight parts.
Embodiment 4
A kind of preparation method growing the hollow ball of warm field for high-temp oxide crystal of the present invention comprises the following steps:
A, by the Al of 75 weight parts
2o
3, 10 weight parts SiO
2with the Cr of 15 weight parts
2o
3join in smelting furnace;
B, by smelting furnace heating temperatures to 2500 DEG C, mixture is melted;
After the fusing of c, mixture, smelting furnace is tilted, liquation is flowed out from converter nose, then open the air pressure valve being contained in smelting furnace blowing up ball nozzle, the diameter blowing ball nozzle is 30 ~ 60mm, and blowing ball nozzle is round steel pipe, blow ball nozzle and be arranged on 50 ~ 80mm place below converter nose, and blow ball nozzle and converter nose angle is 60 ~ 90, make to blow ball nozzle ejection high speed argon gas and dispelled by liquation, the stream pressure of argon gas is 6 ~ 12kg/cm
2, after cooling, point obtain the hollow ball that diameter is 0.2 ~ 5mm through sieving.The tap density of this hollow ball is 0.95g/cm
3, 1500 DEG C of water-cooleds, three compressive strength retention are 76%, and fracture toughness property is 6.2MPa.m
1/2, this hollow ball comprises the Al of 75 weight parts
2o
3, 10 weight parts SiO
2with the Cr of 15 weight parts
2o
3.
Claims (5)
1. grow a hollow ball for warm field for high-temp oxide crystal, it is characterized in that it comprises following component: the Al of 70 ~ 99.4 weight parts
2o
3or ZrO
2, the SiO of 0.1 ~ 10 weight part
2or TiO
2, CaO, MgO or Cr
2o
3middle a kind of, two kinds or two or more mixtures amount to 0.5 ~ 20 weight part.
2. grow a preparation method for the hollow ball of warm field for high-temp oxide crystal, it is characterized in that the method comprises the following steps:
A, by the Al of 70 ~ 99.4 weight parts
2o
3or ZrO
2, 0.1 ~ 10 weight part SiO
2or TiO
2with CaO, MgO or Cr
2o
3middle a kind of, two kinds or two or more mixtures amount to 0.5 ~ 20 weight part and join in smelting furnace;
B, by smelting furnace heating temperatures to 2500 ~ 3200 DEG C, mixture is melted;
After the fusing of c, mixture, smelting furnace being tilted, liquation is flowed out from converter nose, then open and be contained in the air pressure valve of smelting furnace blowing up ball nozzle, make to blow ball nozzle ejection argon gas and liquation is dispelled, after cooling, point obtaining the hollow ball that diameter is 0.2 ~ 5mm through sieving.
3. a kind of preparation method growing the hollow ball of warm field for high-temp oxide crystal according to claim 2, is characterized in that: described in blow ball nozzle be flat or round steel pipe, this diameter of steel tube is 30 ~ 60mm.
4. a kind of preparation method growing the hollow ball of warm field for high-temp oxide crystal according to claim 2, is characterized in that: described in blow ball nozzle and be arranged on 50 ~ 80mm place below converter nose, and blow ball nozzle and converter nose angle is 60 ~ 90 °.
5. a kind of preparation method growing the hollow ball of warm field for high-temp oxide crystal according to claim 2, is characterized in that: the stream pressure of described argon gas is 6 ~ 12kg/cm
2.
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|---|---|---|---|
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|---|---|---|---|
| CN201510495056.3A CN105060862A (en) | 2015-08-13 | 2015-08-13 | Hollow spheres for high-temperature oxide crystal growth thermal field and preparation method of hollow sphere |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204352A (en) * | 2019-07-20 | 2019-09-06 | 兰州理工大学 | A kind of method that copper ashes tailing prepares magnetic hollow ceramic microsphere |
Citations (5)
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|---|---|---|---|---|
| CN101792317A (en) * | 2010-03-09 | 2010-08-04 | 浙江大学 | Method for producing high-strength alumina hollow spheres |
| CN102180686A (en) * | 2011-03-11 | 2011-09-14 | 浙江大学 | Alumina-based calcium aluminum hollow ball and preparation method thereof |
| CN102249715A (en) * | 2011-05-31 | 2011-11-23 | 浙江大学 | Hollow chrome corundum spheres and preparation method thereof |
| CN102249717A (en) * | 2011-05-31 | 2011-11-23 | 浙江大学 | Magnesium-aluminum-calcium hollow sphere and preparation method thereof |
| CN104387030A (en) * | 2014-10-20 | 2015-03-04 | 元亮科技有限公司 | Preparation method of alumina hollow sphere brick for crystal growth furnace thermal field |
-
2015
- 2015-08-13 CN CN201510495056.3A patent/CN105060862A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792317A (en) * | 2010-03-09 | 2010-08-04 | 浙江大学 | Method for producing high-strength alumina hollow spheres |
| CN102180686A (en) * | 2011-03-11 | 2011-09-14 | 浙江大学 | Alumina-based calcium aluminum hollow ball and preparation method thereof |
| CN102249715A (en) * | 2011-05-31 | 2011-11-23 | 浙江大学 | Hollow chrome corundum spheres and preparation method thereof |
| CN102249717A (en) * | 2011-05-31 | 2011-11-23 | 浙江大学 | Magnesium-aluminum-calcium hollow sphere and preparation method thereof |
| CN104387030A (en) * | 2014-10-20 | 2015-03-04 | 元亮科技有限公司 | Preparation method of alumina hollow sphere brick for crystal growth furnace thermal field |
Non-Patent Citations (2)
| Title |
|---|
| 宋希文等: "《耐火制品》", 31 January 2010 * |
| 谈国强等: "《硅酸盐工业产品性能及测试分析》", 31 August 2004 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204352A (en) * | 2019-07-20 | 2019-09-06 | 兰州理工大学 | A kind of method that copper ashes tailing prepares magnetic hollow ceramic microsphere |
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Application publication date: 20151118 |
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