CN102503418B - Low-temperature liquid-phase sintered La2Zr2O7 ceramics and sintering method thereof - Google Patents
Low-temperature liquid-phase sintered La2Zr2O7 ceramics and sintering method thereof Download PDFInfo
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- CN102503418B CN102503418B CN201110328256.1A CN201110328256A CN102503418B CN 102503418 B CN102503418 B CN 102503418B CN 201110328256 A CN201110328256 A CN 201110328256A CN 102503418 B CN102503418 B CN 102503418B
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- 238000005245 sintering Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000007791 liquid phase Substances 0.000 title claims abstract description 26
- 239000000919 ceramic Substances 0.000 title abstract description 34
- 229910002230 La2Zr2O7 Inorganic materials 0.000 title abstract 17
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 22
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 19
- 238000000498 ball milling Methods 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- 239000011812 mixed powder Substances 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 13
- 239000012720 thermal barrier coating Substances 0.000 abstract description 12
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 6
- 239000013078 crystal Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007790 solid phase Substances 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 4
- 239000002671 adjuvant Substances 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 12
- 238000005452 bending Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 238000000280 densification Methods 0.000 description 5
- 238000007542 hardness measurement Methods 0.000 description 5
- 238000001272 pressureless sintering Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001652 electrophoretic deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention relates to low-temperature liquid-phase sintered La2Zr2O7 ceramics comprising 97 to 99.5 percent of La2Zr2O7 and 0.5 to 3 percent of CuO-TiO2 by percent weight. A preparation method of the low-temperature liquid-phase sintered La2Zr2O7 ceramics comprises three steps of proportioning/mixing, pressing and sintering. According to the low-temperature liquid-phase sintered La2Zr2O7 ceramics and the preparation method of the low-temperature liquid-phase sintered La2Zr2O7 ceramics, La2Zr2O7 ceramics is obtained by using common normal-pressure sintering through introducing a binary sintering adjuvant of the CuO-TiO2 into the La2Zr2O7; a liquid phase is formed at low temperature by utilizing the CuO-TiO2 through regulating the content of the CuO-TiO2 and controlling a sintering process, so that an La2Zr2O7 sintering mechanism is converted from solid-phase sintering to liquid-phase sintering; therefore, the sintering temperature is greatly lowered; and a compact La2Zr2O7 ceramic block body is obtained at about 1100 DEG C, the prepared ceramics has smaller crystal grains, the mechanical property is good, and the energy consumption is low. According to the low-temperature liquid-phase sintered La2Zr2O7 ceramics and the preparation method of the low-temperature liquid-phase sintered La2Zr2O7 ceramics, the components are reasonable, the preparation process is simple, the sintering temperature is low, and the La2Zr2O7 crystal grains prepared by sintering are fine and compact; and the preparation of a ceramic material of an La2Zr2O7 thermal barrier coating or an La2Zr2O7 block body at low temperature can be realized. The low-temperature liquid-phase sintered La2Zr2O7 ceramics and the preparation method of the low-temperature liquid-phase sintered La2Zr2O7 ceramics are suitable for industrialized application.
Description
Technical field:
That the present invention relates to is a kind of low-temp liquid-phase sintering La
2zr
2o
7pottery and sintering method, specifically refer to the binary sintering aid CuO-TiO that adds different content
2realize La
2zr
2o
7low-temperature sintering.Belong to structural ceramic material preparing technical field.
Background technology:
Thermal barrier coating is a kind of thermal protection coating being comprised of ceramic insulation top layer and anti-oxidant bond coating.For traditional ceramics insulating surface material 8YSZ (8wt.%Y
2o
3-ZrO
2) the poor problem of high high-temp stability, people have developed the zirconium white that a series of different stabilizers is stable, and research shows that these materials compare with 8YSZ, and its over-all properties is not all significantly improved.In recent years, there is the zinconate ceramics of pyrochlore constitution with its good high high-temp stability and heat-proof quality, become one of focus of thermal barrier coating ceramic insulation skin-material research.Wherein, La
2zr
2o
7there is excellent high high-temp stability, in ℃ temperature range of normal temperature～1300, do not undergo phase transition, and there is the thermal conductivity lower compared with 8YSZ, become a kind of extremely promising novel thermal barrier coating ceramic material that temperature surpasses 1200 ℃ that is applicable to.
Thermal barrier coating adopts plasma spraying or electro beam physics vapour deposition preparation conventionally, but the facility investment of these two kinds of methods is large, and production cost is high, and is not all suitable for the matrix of complicated shape.For this reason, developed multiple method for preparing heat barrier coating, such as slip spraying, electrophoretic deposition, sol-gel etc., wherein slip spraying method is except having the restriction that is not subject to metallic matrix shape, be applicable to the matrix of different shape, outside the feature that required equipment is simple, cheap, cost is low, also there is film forming area large simultaneously, uniform film thickness, fast and the thickness of rate of film build is easy to the advantages such as control, thereby this method is applied widely, be applicable to producing in enormous quantities, be a kind of method for preparing heat barrier coating that has very much application prospect that development in recent years is got up.At present, the key factor that slip spraying method fails to obtain widespread use in the preparation of thermal barrier coating is because the fusing point of thermal barrier coating ceramic material (8YSZ) is higher, need under more than 1400 ℃ sintering temperatures, just can make coating reach certain density, obtain the coating of energy practical application, and the life-time service temperature of matrix Ni alloy is 1100 ℃ of left and right, adopt conventional sintering method, metallic matrix will at high temperature be out of shape even and melt, and preparation process is difficult to carry out.
La
2zr
2o
7although have the fusing point low compared with 8YSZ, its sintering temperature is also 1400 ℃ of left and right, must reduce its sintering temperature, could adopt slip spraying method on Ni alloy substrate, obtain can densification La
2zr
2o
7thermal barrier coating.Conventionally the sintering temperature that reduces stupalith mainly contains two kinds of methods: the one, reduce the particle size of powder, and adopt superfine powder to make raw material. but this method complex process, cost is high.Another kind method is by adding suitable additive, these additives can produce liquid phase in sintering process, form liquid phase sintering, or additive and ceramic matrix form substitutional solid solution, thereby make abnormalization of lattice activation lattice, form hole or migration atom, and make lattice produce distortion, play activated sintering effect, thereby promoted densification process, made material energy densified sintering product at lower temperature.Up to now, there is not yet relevant La
2zr
2o
7the document of ceramic low-temp sintering or the report of patent.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art and provide that a kind of component is reasonable, sintering process is simple, easy and simple to handle, sintering temperature is low, the low-temp liquid-phase sintering La that sintered article crystal grain is tiny, fine and close
2zr
2o
7pottery and sintering side.
A kind of low-temp liquid-phase sintering La of the present invention
2zr
2o
7pottery, by weight percentage, is comprised of following component:
La
2Zr
2O
7 97％～99.5％，
CuO-TiO
20.5%～3%, wherein: CuO and TiO
2mass ratio be 5: 1.
A kind of low-temp liquid-phase sintering La of the present invention
2zr
2o
7in pottery, described La
2zr
2o
7the granularity of powder is≤1 μ m, and purity > 99.5%; Described CuO-TiO
2powder is analytical pure.
A kind of low-temp liquid-phase sintering La of the present invention
2zr
2o
7the sintering method of pottery, comprises the steps:
The first step: batching, batch mixing
Percentage composition takes 97%～99.5% La by weight
2zr
2o
7with 0.5%～3% CuO-TiO
2wet ball-milling is carried out in powder mixing; By the slip obtaining after ball milling dry 20h at 80 ℃, after drying, cross 100 mesh standard sieves, obtain mixed powder; Wherein, CuO and TiO
2mass ratio be 5: 1;
Second step: die mould
In mixed powder, add 1%～3% polyvinyl alcohol as binding agent, after mixing, under 35Mpa, after compression moulding, with the temperature rise rates of 3～8 ℃, be warming up to 300 ℃～400 ℃, insulation 0.5～1.5h, sloughs the binding agent of interpolation; Obtain pressed compact;
The 3rd step: sintering
Pressed compact is warming up to 1100 ℃～1400 ℃ with the temperature rise rate of 3～8 ℃/min, and insulation 3～5h carries out normal pressure-sintered, obtains La after furnace cooling
2zr
2o
7stupalith.
In the present invention, in the zirconia ball grinding jar of described wet ball-milling on planetary ball mill, carry out ratio of grinding media to material: (4～6): 1, abrading-ball: zirconium oxide balls, ball-milling medium: dehydrated alcohol, Ball-milling Time 12～24h.
In the present invention, described normal pressure-sinteredly carry out in high-temperature pressure oxidized still.
The method that the present invention proposes can be used at low temperatures (1100 ℃) prepare La
2zr
2o
7thermal barrier coating, or La
2zr
2o
7block body ceramic material.
The advantage that the present invention has with respect to prior art and beneficial effect:
(1) the present invention is by adding CuO-TiO
2composite powder, as sintering aid, under lower sintering temperature (1100 ℃), can complete La under air atmosphere and condition of normal pressure
2zr
2o
7the sintering densification process of pottery.Therefore, the inventive method can make La
2zr
2o
7the preparation of thermal barrier coating adopts slip spraying-low sintering technique to carry out, and avoids adopting expensive plasma spraying or electro beam physics vapour deposition technique, can significantly reduce La
2zr
2o
7the production cost of thermal barrier coating.
(2) the inventive method is passed through at La
2zr
2o
7middle interpolation sintering aid CuO-TiO
2, in sintering process, there will be liquid phase, thereby greatly reduce sintering temperature, the La of preparation
2zr
2o
7material density is high, and crystal grain is tiny to be evenly distributed, and has good mechanical property, has reduced energy consumption simultaneously.As CuO and TiO
2mass ratio be 5: 1 o'clock, at 919 ℃, there are low eutectic points, in sintering process, there will be liquid phase, the rate of diffusion of zirconic acid lanthanum is accelerated, can be impelled its densification, but when temperature is too low, solid phase diffusion between zirconic acid lanthanum particle is still very slow, does not reach densification.Experimental result shows, when sintering temperature reaches 1100 ℃, can obtain fine and close La
2zr
2o
7block, the sintering temperature while not adding sintering aid reduces more than 300 ℃.
(3) the present invention uses equipment, operational path are simple, and stability, favorable reproducibility, be conducive to suitability for industrialized production, further promotes La
2zr
2o
7the application of material.
In sum, component of the present invention is reasonable, sintering process is simple, easy and simple to handle, and sintering temperature is low, La prepared by sintering
2zr
2o
7crystal grain is tiny, fine and close; Can realize (1100 ℃) under low temperature and prepare La
2zr
2o
7thermal barrier coating or La
2zr
2o
7block body ceramic material.Be suitable for industrial applications.
Accompanying drawing explanation:
Accompanying drawing 1 is the La of the embodiment of the present invention 1 preparation
2zr
2o
7the SEM photo of ceramic block.
The La that accompanying drawing 2 is prepared for comparative example of the present invention
2zr
2o
7the SEM photo of ceramic block.
From the SEM photo of accompanying drawing 1,2, can find out sintering at 1100 ℃, the La that adopts the inventive method to prepare
2zr
2o
7ceramic dense degree is higher, and crystal grain is tiny, almost there is no pore, and un-added La
2zr
2o
7ceramic post sintering block structure is loose, and particle shape does not change substantially, and bonding has just occurred.
Embodiment
The La that the embodiment of the present invention prepares
2zr
2o
7the method that the structure of stupalith and performance are carried out test analysis is:
1, with Archimedes's drainage, measure the density of ceramic block material;
2, with Sirion 200 type field emission scanning electron microscopes (Scanning Electron Microscope, SEM), observe microstructure and the pattern of sample.
3, with electronic universal tester, the bending strength of sample is tested.Use vickers microhardness instrument to test the hardness of sample.
Embodiment 1:
Press La
2zr
2o
7+ 0.5wt% (CuO-16.7wt%TiO
2) ratio raw materials weighing La
2zr
2o
7with CuO-16.7wt%TiO
2: take La
2zr
2o
749.75g, CuO 0.2083g, TiO
20.0417g.Powder is placed in to zirconia ball grinding jar, by 1.5 times of compound gross weight, add dehydrated alcohol as ball-milling medium, by ratio of grinding media to material, add zirconia ball at 4: 1, on planetary ball mill, ball milling obtains slip for 12 hours, by the slurry mixing dry 20h at 80 ℃, excessively after 100 mesh standard sieves, obtain compound; In compound, add the polyvinyl alcohol of 1wt.% as binding agent, then at 35MPa, be pressed into sequin, sequin temperature rise rate with 5 ℃/min in high-temperature pressure oxidized still is risen to 300 ℃, insulation 0.5h, carries out degumming process.After coming unstuck, sample is risen at 1100 ℃ and carries out pressureless sintering 5h with the temperature rise rate of 5 ℃/min, after furnace cooling, obtain fine and close La
2zr
2o
7ceramic block.The La of preparation
2zr
2o
7accompanying drawing 1 is shown in by the SEM photo of ceramic block, ceramic block carried out to density, hardness measurement and bending strength and measure.With this understanding, the density of sample is 96.34%, and its hardness is 1790.96Hv, and bending strength is 354.23MPa.
Embodiment 2:
Press La
2zr
2o
7+ 1.5wt% (CuO-16.7wt%TiO
2) ratio raw materials weighing La
2zr
2o
7with CuO-16.7wt%TiO
2: take La
2zr
2o
749.25g, CuO 0.625g, TiO
20.125g.Powder is placed in to zirconia ball grinding jar, by 1.5 times of compound gross weight, add dehydrated alcohol as ball-milling medium, by ratio of grinding media to material, add zirconia ball at 5: 1, on planetary ball mill, ball milling obtains slip for 18 hours, by the slurry mixing dry 20h at 80 ℃, excessively after 100 mesh standard sieves, obtain compound; In compound, add the polyvinyl alcohol of 2wt.% as binding agent, then at 35MPa, be pressed into sequin, sequin temperature rise rate with 3 ℃/min in high-temperature pressure oxidized still is risen to 350 ℃, insulation 1h, carries out degumming process.After coming unstuck, sample is risen at 1250 ℃ and carries out pressureless sintering 4h with the temperature rise rate of 3 ℃/min, after furnace cooling, obtain fine and close La
2zr
2o
7ceramic block.Ceramic block is carried out to density, hardness measurement and bending strength to be measured.With this understanding, the density of sample is 97.13%, and hardness is 1524.25Hv, and bending strength is 286.52MPa.
Embodiment 3:
Press La
2zr
2o
7+ 3.0wt% (CuO-16.7wt%TiO
2) ratio raw materials weighing La
2zr
2o
7with CuO-16.7wt%TiO
2: take La
2zr
2o
748.5g, CuO 0.1.25g, TiO
20.25g.Powder is placed in to zirconia ball grinding jar, by 1.5 times of compound gross weight, add dehydrated alcohol as ball-milling medium, by ratio of grinding media to material, add zirconia ball at 6: 1, on planetary ball mill, ball milling obtains slip for 24 hours, by the slurry mixing dry 20h at 80 ℃, excessively after 100 mesh standard sieves, obtain compound; In compound, add the polyvinyl alcohol of 3wt.% as binding agent, then at 35MPa, be pressed into sequin, sequin temperature rise rate with 8 ℃/min in high-temperature pressure oxidized still is risen to 400 ℃, insulation 1.5h, carries out degumming process.After coming unstuck, sample is risen at 1400 ℃ and carries out pressureless sintering 5h with the temperature rise rate of 8 ℃/min, after furnace cooling, obtain fine and close La
2zr
2o
7ceramic block.Ceramic block is carried out to density, hardness measurement and bending strength to be measured.With this understanding, the density of sample is that 98.66% hardness is 1859.25Hv, and bending strength is 362.03MPa.
Comparative example;
Take 8YSZ powder 50g, powder is placed in to zirconia ball grinding jar, by 1.5 times of compound gross weight, adds dehydrated alcohol as ball-milling medium, on planetary ball mill, ball milling obtains slip for 12 hours, by the slurry mixing dry 20h at 80 ℃, excessively after 100 mesh standard sieves, obtain compound; In compound, add the polyvinyl alcohol of 1wt.% as binding agent, then at 35MPa, be pressed into sequin, sequin temperature rise rate with 5 ℃/min in high-temperature pressure oxidized still is risen to 300 ℃, insulation 0.5h, carries out degumming process.After coming unstuck, sample is risen at 1100 ℃ and carries out pressureless sintering 5h with the temperature rise rate of 5 ℃/min, after furnace cooling, obtain fine and close La
2zr
2o
7ceramic block.The La of preparation
2zr
2o
7accompanying drawing is shown in by the SEM photo of ceramic block, 2, and ceramic block is carried out to density, hardness measurement and bending strength and measure.Ceramic block is carried out to density, hardness measurement and bending strength to be measured.With this understanding, the density of sample is 62.51%, and hardness is 138.18Hv, and bending strength is 45.32MPa.
From above experimental example, after having added sintering aid, sintering temperature reduces, and the density of sample is greatly enhanced, and mechanical property also improves.
Claims (4)
1. a low-temp liquid-phase sintering La
2zr
2o
7pottery, by weight percentage, is comprised of following component:
La
2Zr
2O
797%～99.5%，
CuO-TiO
20.5%～3%, wherein: CuO and TiO
2mass ratio be 5:1;
Described low-temp liquid-phase sintering La
2zr
2o
7the sintering method of pottery, comprises the steps:
The first step: batching, batch mixing
Percentage composition takes 97%～99.5% La by weight
2zr
2o
7with 0.5%～3% CuO-TiO
2wet ball-milling is carried out in powder mixing; By the slip obtaining after ball milling dry 20h at 80 ℃, after drying, cross 100 mesh standard sieves, obtain mixed powder; Wherein, CuO and TiO
2mass ratio be 5:1;
Second step: die mould
In mixed powder, add 1%～3% polyvinyl alcohol as binding agent, after mixing, under 35Mpa after compression moulding, with the temperature rise rate of 3～8 ℃/min, be warming up to 300 ℃～400 ℃, insulation 0.5～1.5h, sloughs the binding agent of interpolation; Obtain pressed compact;
The 3rd step: sintering
Pressed compact is warming up to 1100 ℃～1400 ℃ with the temperature rise rate of 3～8 ℃/min, and insulation 3～5h carries out normal pressure-sintered, obtains La after furnace cooling
2zr
2o
7stupalith.
2. a kind of low-temp liquid-phase sintering La according to claim 1
2zr
2o
7pottery, is characterized in that: described La
2zr
2o
7the granularity of powder is≤1 μ m, purity >99.5%; Described CuO-TiO
2powder is analytical pure.
3. a kind of low-temp liquid-phase sintering La according to claim 1
2zr
2o
7pottery, is characterized in that: in the zirconia ball grinding jar of described wet ball-milling on planetary ball mill, carry out ratio of grinding media to material: (4～6): 1, and abrading-ball: zirconium oxide balls, ball-milling medium: dehydrated alcohol, Ball-milling Time 12～24h.
4. a kind of low-temp liquid-phase sintering La according to claim 1
2zr
2o
7pottery, is characterized in that: described normal pressure-sinteredly carry out in high-temperature pressure oxidized still.
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|---|---|---|---|
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|---|---|---|---|
| CN201110328256.1A CN102503418B (en) | 2011-10-25 | 2011-10-25 | Low-temperature liquid-phase sintered La2Zr2O7 ceramics and sintering method thereof |
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| CN103803972B (en) * | 2013-12-26 | 2015-01-14 | 浙江大学 | Large-size block La2Zr2O7 ceramic material and hot pressed sintering preparation process thereof |
| CN103803973B (en) * | 2013-12-26 | 2015-09-09 | 浙江大学 | Lower thermal conductivity, high strength dense pure phase zirconic acid lanthanum pottery and preparation method thereof |
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Non-Patent Citations (4)
| Title |
|---|
| 低温烧结8YSZ的微观组织结构及力学性能研究;郭雁军;《中南大学硕士学位论文》;20111017;50-52 * |
| 周宏明等.热障涂层陶瓷材料的研究现状及发展趋势.《材料导报》.2007,第21卷(第1期),1-3. |
| 热障涂层陶瓷材料的研究现状及发展趋势;周宏明等;《材料导报》;20070131;第21卷(第1期);1-3 * |
| 郭雁军.低温烧结8YSZ的微观组织结构及力学性能研究.《中南大学硕士学位论文》.2011,50-52. |
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