CN101481252A - Rare earth perovskite type fire-resistant material - Google Patents
Rare earth perovskite type fire-resistant material Download PDFInfo
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- CN101481252A CN101481252A CNA2009100136922A CN200910013692A CN101481252A CN 101481252 A CN101481252 A CN 101481252A CN A2009100136922 A CNA2009100136922 A CN A2009100136922A CN 200910013692 A CN200910013692 A CN 200910013692A CN 101481252 A CN101481252 A CN 101481252A
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Abstract
The invention relates to a rear-earth perovskite refractory material. The refractory material comprises the following components by weight percentages: 75-97% of LaCrO3 and 3-25% of ZrO2. In the refractory material, microstructure is optimized and thermal shock resistance property is improved by grain composition; and ZrO2 phase transformation toughening is applied to the rear-earth perovskite material to strengthen and toughen the material. High temperature property and slag corrosion resistance of the material are improved by improving the structure. Furthermore, the invention provides a novel refractory material for solving the urgent needs of Chinese iron and steel industry and expands the application space of the rear-earth perovskite material, thus fully utilizing Chinese rich rear-earth resources (the use amount of lanthana in the LaMO3 accounts for more than 65%) and producing huge economic benefit and social benefit.
Description
Technical field
The present invention relates to a kind of refractory materials, especially a kind of rare earth perovskite type fire-resistant material.
Background technology
Refractory materials is the indispensable base mateiral of high-temperature technology, and its development is closely related with hot industry, especially with Iron And Steel Industry interdependence, common development.In recent years, fast development along with smelting technology and Iron And Steel Industry, refractory materials has also been realized a series of great technological changes, just progressively by the original goods group who depends on natural matter, production in enormous quantities to being that the precision of principle, senior product series change with many kinds, short run, artificial raw material, exploitation and design etc., promptly change to diversified novel refractory by classic refractory materials.Famous refractory materials expert professor Zhong Xiangchong of China thinks that the development of refractories emphasis remains the Iron And Steel Industry refractory materials, and the most important thing is the continuous casting material.The development of continuous casting technology had both simultaneously also proposed more harsh requirement to properties of refractories and kind for China's refractory industry brings unprecedented development opportunity.
The total strategy one of refractory materials development is to improve and improve the over-all properties of existing refractory materials, and another is to explore novel refractory, promptly opens up and excavate new refractory material system.Fusing point more than 2000 ℃, the oxide compound that can be used as high grade refractory is a lot.But except high-melting-point, also must possess the manufacturing process of multiple high-temperature behavior and comparative maturity, so up to the present, have only partial oxide to can be used as refractory materials and produce and use, wherein a large amount of use Al arranged
2O
3, MgO, ZrO
2, CaO etc.The perovskite type rare earth complex oxide material is because its outstanding physics, chemical property, becomes ferrous metallurgy with refractory materials alternate product preferably.
RE perovskite type (ABO
3) stupalith (LaMO
3, M=Mn, Cr, Ga etc.) and have fusing point height, specific conductivity than characteristics such as height, have good chemical stability and mechanical property under the high temperature, and have moderate mechanical property, have a wide range of applications in field of functional materials.Table 1 is the salient features comparison of RE perovskite material with traditional refractory materials.Al
2O
3And ZrO
2Be the main component of present refractory materials, LaGaO
3, LaMnO
3And LaCrO
3All are ceramic materials of RE perovskite structure.The domestic and international LaMO of the result of contrast table 1 and analysis-by-synthesis
3Research and this breadboard previous work can find partial L aMO
3High-temperature behavior and thermal expansivity suitable with refractory materials.RE perovskite type materials chemistry performance is stable, is better than most of existing refractory materials.The cold crushing strength of regulation refractory product (sees Table 2), LaMO in the existing relevant criterion more than 20MPa
3The cold crushing strength of material meets the requirements fully.The working temperature of continuous casting refractory materials is generally below 1600 ℃, and chromic acid lanthanum high temperature Heating element maximum service temperature can reach 1900 ℃ at present, also can satisfy this temperature requirement.But pure LaMO
3The stupalith thermal expansivity is big and thermal conductivity is lower, and thermal shock resistance is relatively poor, and mechanical behavior under high temperature is also not really clear, can't directly be used as refractory materials.If be applied to fire resisting material field, must strengthen its high-temperature bending strength and creep-resistant property, improve the anti-thermal shock fracture energy.
Summary of the invention
The objective of the invention is provides a kind of not carbon containing, silicon, the rare earth perovskite type fire-resistant material of pyrochemistry stable performance for overcoming above-mentioned the deficiencies in the prior art.
For achieving the above object, the present invention adopts following technical proposals: a kind of rare earth perovskite type fire-resistant material comprises following component in percentage by weight, LaCrO
375～97%, ZrO
23～25%.
The further composition of the present invention (weight percent) is LaCrO
385～95%, ZrO
25～15%.
Described LaCrO
3Atomic structure be perovskite typed.
The present invention is with high-temperature oxide ZrO
2As second phase, it is joined in the rare earth oxide chromic acid lanthanum matrix by certain mass percent be prepared into matrix material, by the admixture sintering, the performance of refractory materials is improved significantly.Specific targets are shown in subordinate list 1.
At high temperature sintering after X-ray diffraction detects ZrO
2With matrix chromic acid lanthanum any reaction not taking place, do not generate cenotype, does not change La
1-xCa
xCrO
3Structure form, as shown in Figure 1.
Advantage of the present invention is as follows: 1, ZrO2 is used for the toughened and reinforced of complex rare-earth oxidate containing valuable metal stupalith; Optimize microstructure by grain composition, improve thermal shock resistance, slag corrosion resistance energy and the mechanical behavior under high temperature of material, make it to satisfy the performance requriements of continuous casting refractory materials, expand the range of application of performance function pottery.
2, not carbon containing, silicon of Yan Zhi material, the pyrochemistry stable performance can overcome current material and cause molten steel recarburization, increases silicon and be easy to dross, phenomenon of blocking.
3, the present invention not only provides novel refractory materials, has solved the urgent need of China's steel industry, has also expanded the application space of RE perovskite type material, makes the rare earth resources of the China's abundant (LaMO that is fully utilized
3Middle lanthanum trioxide consumption accounts for more than 65%), produce huge economic and social benefit.
Description of drawings
Fig. 1 is the sample X ray diffracting spectrum of the different zirconia contents of the present invention;
Among the figure, a represents 0% ZrO
2, b represents 2% ZrO
2, c represents 5% ZrO
2, d represents 10% ZrO
2, e represents 20% ZrO
2, wherein, percent values represent percent by weight.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment 1: comprise following component in percentage by weight, LaCrO
375%, ZrO
225%.
LaCrO
3Atomic structure be perovskite typed.
The present invention is with high-temperature oxide ZrO
2As second phase, it is joined in the rare earth oxide chromic acid lanthanum matrix by certain mass percent be prepared into matrix material, by the admixture sintering, the performance of refractory materials is improved significantly.Specific targets are as shown in table 1.
The present invention at high temperature sintering after X-ray diffraction detects ZrO
2With matrix chromic acid lanthanum any reaction not taking place, do not generate cenotype, does not change La
1-xCa
xCrO
3Structure form.As shown in Figure 1.
Embodiment 2: embodiment 1: comprise following component in percentage by weight, LaCrO
385%, ZrO
215%.
LaCrO
3Atomic structure be perovskite typed.
The present invention is with high-temperature oxide ZrO
2As second phase, it is joined in the rare earth oxide chromic acid lanthanum matrix by certain mass percent be prepared into matrix material, by the admixture sintering, the performance of refractory materials is improved significantly.Specific targets are as shown in table 1.
The present invention at high temperature sintering after X-ray diffraction detects ZrO
2With matrix chromic acid lanthanum any reaction not taking place, do not generate cenotype, does not change La
1-xCa
xCrO
3Structure form.As shown in Figure 1.
Embodiment 3: comprise following component in percentage by weight, LaCrO
390%, ZrO
210%.
LaCrO
3Atomic structure be perovskite typed.
The present invention is with high-temperature oxide ZrO
2As second phase, it is joined in the rare earth oxide chromic acid lanthanum matrix by certain mass percent be prepared into matrix material, by the admixture sintering, the performance of refractory materials is improved significantly.Specific targets are as shown in table 1.
The present invention at high temperature sintering after X-ray diffraction detects ZrO
2With matrix chromic acid lanthanum any reaction not taking place, do not generate cenotype, does not change La
1-xCa
xCrO
3Structure form.As shown in Figure 1.
Embodiment 4: comprise following component in percentage by weight, LaCrO
395%, ZrO
25%.
LaCrO
3Atomic structure be perovskite typed.
The present invention is with high-temperature oxide ZrO
2As second phase, it is joined in the rare earth oxide chromic acid lanthanum matrix by certain mass percent be prepared into matrix material, by the admixture sintering, the performance of refractory materials is improved significantly.Specific targets are as shown in table 1.
The present invention at high temperature sintering after X-ray diffraction detects ZrO
2With matrix chromic acid lanthanum any reaction not taking place, do not generate cenotype, does not change La
1-xCa
xCrO
3Structure form.As shown in Figure 1.
Embodiment 5: comprise following component in percentage by weight, LaCrO
397%, ZrO
23%.
LaCrO
3Atomic structure be perovskite typed.
The present invention is with high-temperature oxide ZrO
2As second phase, it is joined in the rare earth oxide chromic acid lanthanum matrix by certain mass percent be prepared into matrix material, by the admixture sintering, the performance of refractory materials is improved significantly.Specific targets are as shown in table 1.
The present invention at high temperature sintering after X-ray diffraction detects ZrO
2With matrix chromic acid lanthanum any reaction not taking place, do not generate cenotype, does not change La
1-xCa
xCrO
3Structure form.As shown in Figure 1.
Table 2
Claims (3)
1. rare earth perovskite type fire-resistant material, it is characterized in that: it comprises following component in percentage by weight, LaCrO
375～97%, ZrO
23～25%.
2. rare earth perovskite type fire-resistant material according to claim 1 is characterized in that: it comprises following component in percentage by weight, LaCrO
385～95%, ZrO
25～15%.
3. rare earth perovskite type fire-resistant material according to claim 1 and 2 is characterized in that: described LaCrO
3Atomic structure be perovskite typed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100136922A CN101481252A (en) | 2009-02-10 | 2009-02-10 | Rare earth perovskite type fire-resistant material |
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|---|---|---|---|
| CNA2009100136922A CN101481252A (en) | 2009-02-10 | 2009-02-10 | Rare earth perovskite type fire-resistant material |
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|---|---|
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Family
ID=40878568
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| CNA2009100136922A Pending CN101481252A (en) | 2009-02-10 | 2009-02-10 | Rare earth perovskite type fire-resistant material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070132A (en) * | 2013-03-26 | 2014-10-01 | 通用电气公司 | Foam pattern coated with castable refractory and used for casting evanescent mode as well as production and application methods thereof |
| CN105693244A (en) * | 2016-01-27 | 2016-06-22 | 西南科技大学 | Preparation method of lanthanum chromite powder |
| CN106187187A (en) * | 2016-06-30 | 2016-12-07 | 曹柏青 | Ceramic preparation, pottery and basalt bushing |
| CN106810239A (en) * | 2015-11-30 | 2017-06-09 | 比亚迪股份有限公司 | Zirconium base composite ceramic material (coffee color) and preparation method thereof and shell or ornament |
| CN113637241A (en) * | 2021-09-07 | 2021-11-12 | 赛轮集团股份有限公司 | Rubber composition for tire steel wire belt and preparation method thereof |
| CN113800923A (en) * | 2021-08-30 | 2021-12-17 | 中国科学院金属研究所 | Anti-caking material, submerged nozzle lining, submerged nozzle and preparation method thereof |
-
2009
- 2009-02-10 CN CNA2009100136922A patent/CN101481252A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070132A (en) * | 2013-03-26 | 2014-10-01 | 通用电气公司 | Foam pattern coated with castable refractory and used for casting evanescent mode as well as production and application methods thereof |
| CN106810239A (en) * | 2015-11-30 | 2017-06-09 | 比亚迪股份有限公司 | Zirconium base composite ceramic material (coffee color) and preparation method thereof and shell or ornament |
| CN105693244A (en) * | 2016-01-27 | 2016-06-22 | 西南科技大学 | Preparation method of lanthanum chromite powder |
| CN105693244B (en) * | 2016-01-27 | 2018-08-31 | 西南科技大学 | A kind of preparation method of Lanthanum Chromite Powders |
| CN106187187A (en) * | 2016-06-30 | 2016-12-07 | 曹柏青 | Ceramic preparation, pottery and basalt bushing |
| CN106187187B (en) * | 2016-06-30 | 2020-04-24 | 四川航天拓鑫玄武岩实业有限公司 | Ceramic preparation method, ceramic and basalt wire drawing bushing plate |
| CN113800923A (en) * | 2021-08-30 | 2021-12-17 | 中国科学院金属研究所 | Anti-caking material, submerged nozzle lining, submerged nozzle and preparation method thereof |
| CN113637241A (en) * | 2021-09-07 | 2021-11-12 | 赛轮集团股份有限公司 | Rubber composition for tire steel wire belt and preparation method thereof |
| CN113637241B (en) * | 2021-09-07 | 2023-02-28 | 赛轮集团股份有限公司 | Rubber composition for tire steel wire belt and preparation method thereof |
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Open date: 20090715 |