CN109081692A - A kind of Yb3+/Ce4+Codope La2Zr2O7High-temperature flame-proof thermal insulation ceramics material and preparation method - Google Patents
A kind of Yb3+/Ce4+Codope La2Zr2O7High-temperature flame-proof thermal insulation ceramics material and preparation method Download PDFInfo
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Abstract
The invention discloses a kind of Yb3+/Ce4+Codope La2Zr2O7High-temperature flame-proof thermal insulation ceramics material and preparation method are coordinated to form water-soluble metal carboxylate chelate, pass through the COO in gel network with metal ion using citric acid as chelating agent in molecular level‑With NO3 ‑In-situ oxidation-reduction reaction occurs, high temperature insulating ceramic material is made, the chemical composition of the ceramic material is La 2‑x Yb x Zr2‑ yCe y O 7 , wherein 0≤x≤0.5,0≤y≤0.5.Yb produced by the present invention3+/Ce4+Codope La2Zr2O7High-temperature flame-proof thermal insulation ceramics material has many advantages, such as that high-melting-point, lower thermal conductivity, high thermal expansion coefficient, low frit rate, low elastic modulus and high temperature phase composition are stablized.
Description
Technical field
The present invention relates to technical field of inorganic nonmetallic materials, especially a kind of Yb3+/Ce4+Codope La2Zr2O7High temperature
Refractory heat-insulating ceramic material and preparation method.
Background technique
With being constantly progressive for industrial high temperature technology, the Service Environment of refractory material is harsher, for refractory material
Performance requirement is higher.While meeting material high refractoriness, refractory material will more have the requirement of high-temperature heat-resistant, i.e. material bodies
System needs to have lower intrinsic thermal conductivity.Current most widely used fire-resistant heat insulating material is 7~8wt% stabilized with yttrium oxide oxygen
Change zirconium (YSZ) ceramic material, but cubic metastable phase (t') occurs when operating temperature is higher than 1200 °C for YSZ material to tetragonal phase
(t) change, occur in cooling procedure tetragonal phase (t) to cubic phase (c), monoclinic phase (m) transformation caused by volume change, cause
Coating cracking failure；In addition YSZ material at high temperature easy-sintering leads to thermal conductivity raising, elasticity modulus increase, fracture toughness reduces etc.
Problem has been unable to meet the requirement that high-temperature technology of new generation is high to refractoriness, heat-proof quality is excellent, service life is long.
Zirconic acid lanthanum belongs to pyrochlore-type crystal structure (as shown in Fig. 1), has high-melting-point, thermal conductivity low and high temperature chemistry
Stability is good, room temperature to fusing point without phase-change, low Young's modulus and the advantages that anti-sintering, be the important time of high temperature insulating refractory material
Material selection.But its thermal expansion coefficient lower (~9.1 × 10-6/ K, T=1073K), it is mismatched with metallic substrates, limits it in high temperature
Heat-insulated field application.By ion doping, especially with the minor radius ion of the big ionic compartmentation lattice position of radius, cause from
The relaxation that sub-key is closed, i.e. the reduction of Cohesive Energy, and then realize the raising of thermal expansion coefficient.The study found that by La3+
Lattice position doping with rare-earth ions can introduce point defect, enhance phon scattering；In Zr4+Adulterate the Ce of big ionic radius in lattice position4+
It can be because of Ce under high temperature3+/Ce4+Between transformation cause significantly improving for thermal expansion coefficient.
Summary of the invention
The invention aims to solve the deficiencies in the prior art, a kind of Yb is provided3+/Ce4+Codope
La2Zr2O7High-temperature flame-proof thermal insulation ceramics material and preparation method, ceramic material obtained can be used at room temperature~1873K,
With high-temperature flame-proof, heat-insulated, lower thermal conductivity, high expansion coefficient.
In order to achieve the above objectives, the present invention is implemented according to following technical scheme:
A kind of Yb3+/Ce4+Codope La2Zr2O7High-temperature flame-proof thermal insulation ceramics material, the chemical composition of the ceramic material are La 2- x Yb x Zr2-yCe y O 7 , wherein 0≤x≤0.5,0≤y≤0.5.
Preferably, the chemical composition of the ceramic material is La 1.9 Yb 0.1 Zr1.8Ce 0.2 O 7 Or La 1.8 Yb 0.2 Zr1.9Ce 0.1 O 7
Or La 1.9 Yb 0.1 Zr1.9Ce 0.1 O 7 Or La 1.8 Yb 0.2 Zr1.8Ce 0.2 O 7 Or La 1.7 Yb 0.3 Zr1.9Ce 0.1 O 7 Or
La 1.9 Yb 0.1 Zr1.7Ce 0.3 O 7 。
Preferably, the chemical composition of the ceramic material is La 2 Zr1.8Ce 0.2 O 7 Or La 1.5 Yb 0.5 Zr2O 7 Or La 2 Zr2O 7 Or
La 1.5 Yb 0.5 Zr1.5Ce 0.5 O 7 Or La 1.6 Yb 0.4 Zr1.7Ce 0.3 O 7 Or La 2 Zr1.5Ce 0.5 O 7 。
In addition, the present invention also provides a kind of Yb3+/Ce4+Codope La2Zr2O7The preparation of high-temperature flame-proof thermal insulation ceramics material
Method, the specific steps are as follows:
(1) according to La 2-x Yb x Zr2-yCe y O 7 Chemical composition, by mol ratio be (2-x): x:(2-y): the La (NO of y3)3·
6H2O、Yb(NO3)3·6H2O、Zr(NO3)4·5H2O, ammonium ceric nitrate (NH4)2Ce(NO3)6It is dissolved in deionized water and obtains metal
Nitrate solution, wherein 0≤x≤0.5,0≤y≤0.5, the amount of deionized water are that metal ion is total in metal-nitrate solutions
3.5 ~ 6.5 times of molal quantity claim according still further to 1.2 ~ 3.6 times of ratio of the metal ion total mole number in metal-nitrate solutions
Monohydrate potassium is taken, and is added it in above-mentioned metal-nitrate solutions, mixed solution is obtained；
(2) mixed solution that step (1) obtains is placed on magnetic stirring apparatus, heating evaporation obtains transparent gel；
(3) gel made from step (3) is placed in 170~200 °C of baking oven and is kept the temperature, obtain loose porous La 2- x Yb x Zr2-yCe y O 7 Xerogel presoma；
(4) by La 2-x Yb x Zr2-yCe y O 7 Xerogel presoma is placed in 850~950 °C of temperature lower calcinations, finally 1100~
It is heat-treated 4~8 hours at a temperature of 1500 °C and obtains La 2-x Yb x Zr2-yCe y O 7 Ceramic powder to get arrive Yb3+/Ce4+Codope
La2Zr2O7High-temperature flame-proof thermal insulation ceramics material.
Further, the heating steaming of mixed solution is heating stirring at a temperature of 75~100 °C in the step (2).
Further, soaking time is 8~16 hours in the step (3).
Further, calcination time is 6~12 hours in the step (4).
The principle of the present invention are as follows: the citric acid in synthesis technology of the present invention is chelating agent, with metal ion in molecular level
Coordination forms water-soluble metal carboxylate chelate；Pass through the COO in gel network-With NO3 -In-situ oxidation-reduction reaction occurs
High temperature insulating ceramic material is made；In the La of Thermal Synthetic excellent physical properties2Zr2O7On the basis of material system, it is respectively adopted dilute
Native ion Yb3+To La3+Lattice position is replaced, quadrivalent ion Ce4+To Zr4+Lattice position is replaced, this twin crystal case ion
The point defect that doping introduces causes the fluctuation of quality and stress field, significantly increases phon scattering, reduces mean free path of phonons, drop
While low material thermal conductivity, La can also be realized2Zr2O7The relaxation of material crystal structure, thus also obtain higher thermal expansion
Coefficient；The promotion of this comprehensive thermophysical property, can be by La2Zr2O7The application field of material is from high-temperature flame-proof, heat-insulated field
Extend to novel heat barrier coat material field.
Compared with prior art, the present invention has following effective:
1. Yb produced by the present invention3+/Ce4+Codope La2Zr2O7There is high-temperature flame-proof thermal insulation ceramics material high-melting-point, low-heat to lead
The advantages that rate, high thermal expansion coefficient, low frit rate, low elastic modulus and high temperature phase composition are stablized.Yb3+、Ce4+Ion difference
Part replaces La3+、Zr3+Position, the biggish Yb of ionic radius3+、Ce4+Cause La2Zr2O7The lattice of pyrochlore crystal structure is abnormal
Become, cell configuration relaxation is conducive to the reduction of material thermal conductivity and the increase of thermal expansion coefficient.The novel height that the present invention designs
Warm fire resisting, thermal resistance ceramic material La 2-x Yb x Zr2-yCe y O 7 For thermal conductivity be only 1.38 ~ 1.55Wm-1·K-1, T=1273K
(intrinsic thermal conductivity deducts the influence of stomata), and thermal expansion coefficient can reach 11.5 ~ 12.8 × 10-6K-1, T=1273K；Room temperature
Without phase-change to melting temperature section；It can be on active service under 2873K hot conditions；The anti-caking power of high temperature is strong；It can be used as industry
Furnace door refractory brick thermal protection reinforcing material, the heat-insulated back boxing of high-temperature flame-proof and thermal barrier coating ceramic material of new generation.
2. preparation process of the present invention is simple, synthesis cycle is short, and phase composition is single pyrochlore constitution, is easy to from molecular level
Not Kong Zhi phase constituent, process equipment is simple, is suitable for a large amount of synthesis, has stronger popularization and industrial application value, can be extensive
Applied to high-temperature refractory field, high temperature insulating field, novel thermal barrier coating ceramic layer material field.
Detailed description of the invention
Fig. 1 is pyrochlore-type La in the prior art2Zr2O7Crystal structure schematic diagram.
Fig. 2 is different Yb3+、Ce4+The La of ions dosage 2-x Yb x Zr2-yCe y O 7 Polycrystal powder XRD spectrum.
Fig. 3 is the La of one embodiment of the invention 1.7 Yb 0.3 Zr1.5Ce 0.5 O 7 The SEM image of ceramic material.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, below in conjunction with drawings and examples, to this
Invention is described in further detail.Described herein the specific embodiments are only for explaining the present invention, is not used to limit
Invention.
Embodiment 1
La (the NO for being 1.9:0.1:1.6:0.4 by mol ratio3)3·6H2O、Yb(NO3)3·6H2O、Zr(NO3)4·5H2O, nitre
Sour cerium ammonium (NH4)2Ce(NO3)6It is dissolved in deionized water and obtains metal-nitrate solutions, the amount of deionized water is metal nitrate
3.5 times of metal ion total mole number in salting liquid, according still further to 1.5 times of metal ion total mole number in metal-nitrate solutions
Ratio weigh monohydrate potassium (C6H8O7·H2O), and add it in above-mentioned metal-nitrate solutions, mixed
Mixed solution is placed on heating magnetic stirring apparatus by solution, and evaporation obtains transparent gel under 85 °C of heating stirrings, then will
Above-mentioned gel is placed in 185 °C of baking oven and keeps the temperature 10 hours, obtains loose porous La 1.9 Yb 0.1 Zr1.6Ce 0.4 O 7 Before xerogel
Body is driven, is then calcined 8 hours under 850 °C, metal carboxylate chelate and NO in gel network3 -Situ oxygen occurs
Change-reduction reaction most obtains La through being heat-treated 6 hours under 1350 °C afterwards 1.9 Yb 0.1 Zr1.6Ce 0.4 O 7 Ceramic powder is denoted as sample
S1。
By La obtained above 1.9 Yb 0.1 Zr1.6Ce 0.4 O 7 Ceramic powder material uses Germany Bruker-D8 Advance
Da Vinci x-ray diffractometer measures the XRD spectrum of sample, and obtained crystal structure is pyrochlore constitution (JCPDS No:#
73-0444), as shown in sample S1 in Fig. 2；Through discharge plasma sintering (pressure 45Mpa, 1400 °C keep the temperature 10 minutes)
Sample (Φ=12.7mm, d=1.24mm) uses laser flash method to measure material thermal conductivity as 1.41Wm-1·K-1, T=
1273K；German Netzsch DIL 402E type high temperature dilatometer is used to measure thermal expansion coefficient as 12.7 × 10-6K-1, T=
1273K。
Embodiment 2
La (the NO for being 1.8:0.2:1.7:0.3 by mol ratio3)3·6H2O、Yb(NO3)3·6H2O、Zr(NO3)4·5H2O, nitre
Sour cerium ammonium (NH4)2Ce(NO3)6It is dissolved in deionized water and obtains metal-nitrate solutions, the amount of deionized water is metal nitrate
6.5 times of metal ion total mole number in salting liquid, according still further to 1.2 times of metal ion total mole number in metal-nitrate solutions
Ratio weigh monohydrate potassium (C6H8O7·H2O), and add it in above-mentioned metal-nitrate solutions, mixed
Mixed solution is placed on heating magnetic stirring apparatus by solution, and evaporation obtains transparent gel under 90 °C of heating stirrings, then will
Above-mentioned gel is placed in 180 °C of baking oven and keeps the temperature 12 hours, obtains loose porous La 1.8 Yb 0.2 Zr1.7Ce 0.3 O 7 Before xerogel
Body is driven, is then calcined 10 hours under 900 °C, metal carboxylate chelate and NO in gel network3 -Situ oxygen occurs
Change-reduction reaction most obtains La through being heat-treated 4 hours under 1400 °C afterwards 1.8 Yb 0.2 Zr1.7Ce 0.3 O 7 Ceramic powder is denoted as sample
S2。
By La obtained above 1.8 Yb 0.2 Zr1.7Ce 0.3 O 7 Ceramic powder material uses Germany Bruker-D8 Advance
Da Vinci x-ray diffractometer measures the XRD spectrum of sample, and obtained crystal structure is pyrochlore constitution (JCPDS No:#
73-0444), as shown in sample S2 in Fig. 2；Through discharge plasma sintering (pressure 45Mpa, 1400 °C keep the temperature 10 minutes)
Sample (Φ=12.7mm, d=1.24mm) uses laser flash method to measure material thermal conductivity as 1.43Wm-1·K-1, T=
1273K；German Netzsch DIL 402E type high temperature dilatometer is used to measure thermal expansion coefficient as 12.1 × 10-6K-1, T=
1273K。
Embodiment 3
La (the NO for being 1.6:0.4:1.9:0.1 by mol ratio3)3·6H2O、Yb(NO3)3·6H2O、Zr(NO3)4·5H2O, nitre
Sour cerium ammonium (NH4)2Ce(NO3)6It is dissolved in deionized water and obtains metal-nitrate solutions, the amount of deionized water is metal nitrate
4 times of metal ion total mole number in salting liquid, according still further to 1.6 times of metal ion total mole number in metal-nitrate solutions
Ratio weighs monohydrate potassium (C6H8O7·H2O), and add it in above-mentioned metal-nitrate solutions, obtain mixing molten
Mixed solution is placed on heating magnetic stirring apparatus by liquid, and evaporation obtains transparent gel under 95 °C of heating stirrings, then will be upper
It states gel and is placed in 185 °C of baking oven and keep the temperature 10 hours, obtain loose porous La 1.6 Yb 0.4 Zr1.9Ce 0.1 O 7 Xerogel forerunner
Then body is calcined 8 hours, metal carboxylate chelate and NO in gel network under 950 °C3 -In-situ oxidation-occurs
Reduction reaction most obtains La through being heat-treated 4 hours under 1400 °C afterwards 1.6 Yb 0.4 Zr1.9Ce 0.1 O 7 Ceramic powder is denoted as sample S3.
By La obtained above 1.6 Yb 0.4 Zr1.9Ce 0.1 O 7 Ceramic powder material uses Germany Bruker-D8 Advance
Da Vinci x-ray diffractometer measures the XRD spectrum of sample, and obtained crystal structure is pyrochlore constitution (JCPDS No:#
73-0444), as shown in sample S3 in Fig. 2；Through discharge plasma sintering (pressure 45Mpa, 1400 °C keep the temperature 10 minutes)
Sample (Φ=12.7mm, d=1.24mm) uses laser flash method to measure material thermal conductivity as 1.44Wm-1·K-1, T=
1273K；German Netzsch DIL 402E type high temperature dilatometer is used to measure thermal expansion coefficient as 11.8 × 10-6K-1, T=
1273K。
Embodiment 4
La (the NO for being 1.5:0.5:1.6:0.4 by mol ratio3)3·6H2O、Yb(NO3)3·6H2O、Zr(NO3)4·5H2O, nitre
Sour cerium ammonium (NH4)2Ce(NO3)6It is dissolved in deionized water and obtains metal-nitrate solutions, the amount of deionized water is metal nitrate
5 times of metal ion total mole number in salting liquid, according still further to 2.5 times of metal ion total mole number in metal-nitrate solutions
Ratio weighs monohydrate potassium (C6H8O7·H2O), and add it in above-mentioned metal-nitrate solutions, obtain mixing molten
Mixed solution is placed on heating magnetic stirring apparatus by liquid, and evaporation obtains transparent gel under 90 °C of heating stirrings, then will be upper
It states gel and is placed in 190 °C of baking oven and keep the temperature 9 hours, obtain loose porous La 1.5 Yb 0.5 Zr1.6Ce 0.4 O 7 Xerogel forerunner
Then body is calcined 10 hours, metal carboxylate chelate and NO in gel network under 900 °C3 -In-situ oxidation-occurs
Reduction reaction most obtains La through being heat-treated 4 hours under 1400 °C afterwards 1.5 Yb 0.5 Zr1.6Ce 0.4 O 7 Ceramic powder is denoted as sample S4.
By La obtained above 1.5 Yb 0.5 Zr1.6Ce 0.4 O 7 Ceramic powder material uses Germany Bruker-D8 Advance
Da Vinci x-ray diffractometer measures the XRD spectrum of sample, and obtained crystal structure is pyrochlore constitution (JCPDS No:#
73-0444), as shown in sample S4 in Fig. 2；Through discharge plasma sintering (pressure 45Mpa, 1400 °C keep the temperature 10 minutes)
Sample (Φ=12.7mm, d=1.24mm) uses laser flash method to measure material thermal conductivity as 1.38Wm-1·K-1, T=
1273K；German Netzsch DIL 402E type high temperature dilatometer is used to measure thermal expansion coefficient as 12.3 × 10-6K-1, T=
1273K。
Embodiment 5
It is (2-x): x:(2-y by mol ratio): the La (NO of y3)3·6H2O、Yb(NO3)3·6H2O、Zr(NO3)4·5H2O, nitre
Sour cerium ammonium (NH4)2Ce(NO3)6It is dissolved in deionized water and obtains metal-nitrate solutions, wherein 0≤x≤0.5,0≤y≤
0.5, the amount of deionized water is 3.5 ~ 6.5 times of metal ion total mole number in metal-nitrate solutions, according still further to metal nitrate
2.5 times of metal ion total mole number of ratio in salting liquid weighs monohydrate potassium (C6H8O7·H2O), and it is added into
Into above-mentioned metal-nitrate solutions, mixed solution is obtained, mixed solution is placed on heating magnetic stirring apparatus, is heated at 85 °C
The lower evaporation of stirring obtains transparent gel, is then placed in above-mentioned gel in 185 °C of baking oven and keeps the temperature 10 hours, obtains loose more
The La in hole 1.7 Yb 0.3 Zr1.5Ce 0.5 O 7 Then xerogel presoma is calcined 8 hours, the gold in gel network under 950 °C
Belong to carboxylate chelate and NO3 -In-situ oxidation-reduction reaction occurs, is most obtained afterwards through being heat-treated 4 hours under 1400 °C
La 1.7 Yb 0.3 Zr1.5Ce 0.5 O 7 Ceramic powder is denoted as sample S5.
By La obtained above 1.7 Yb 0.3 Zr1.5Ce 0.5 O 7 Ceramic powder material uses Germany Bruker-D8 Advance
Da Vinci x-ray diffractometer measures the XRD spectrum of sample, and obtained crystal structure is pyrochlore constitution (JCPDS No:#
73-0444), as shown in sample S5 in Fig. 2；Attached drawing 3 is La 1.7 Yb 0.3 Zr1.5Ce 0.5 O 7 The scanning electron microscope of ceramics sample
(SEM) photo, grain size are 200 ~ 350nm and have helical form crystal growth step, this nanoscale crystal growth platform
Rank can fetter part phonon modes, and then reduce mean free path of phonons.Through discharge plasma sintering (pressure 45Mpa,
1400 °C keep the temperature 10 minutes) sample (Φ=12.7mm, d=1.24mm) use laser flash method measure material thermal conductivity for
1.40W·m-1·K-1, T=1273K；Use German Netzsch DIL 402E type high temperature dilatometer measure thermal expansion coefficient for
12.8×10-6K-1, T=1273K.
Carry out actual test to ceramic material made from above-described embodiment: thermal conductivity is only 1.38 ~ 1.55Wm-1·K-1
, the intrinsic thermal conductivity of T=1273K(deducts the influence of stomata), and thermal expansion coefficient can reach 11.5 ~ 12.8 × 10-6K-1, T=
1273K；Room temperature to melting temperature section without phase-change；It can be on active service under 2873K hot conditions；The anti-caking power of high temperature is strong；It can
To make pottery as Industrial Stoves fire door refractory brick thermal protection reinforcing material, the heat-insulated back boxing of high-temperature flame-proof and thermal barrier coating of new generation
Ceramic material.
The limitation that technical solution of the present invention is not limited to the above specific embodiments, it is all to do according to the technique and scheme of the present invention
Technology deformation out, falls within the scope of protection of the present invention.
Claims (7)
1. a kind of Yb3+/Ce4+Codope La2Zr2O7High-temperature flame-proof thermal insulation ceramics material, it is characterised in that: the change of the ceramic material
Group becomes La 2-x Yb x Zr2-yCe y O 7 , wherein 0≤x≤0.5,0≤y≤0.5.
2. Yb according to claim 13+/Ce4+Codope La2Zr2O7High-temperature flame-proof thermal insulation ceramics material, it is characterised in that:
The chemical composition of the ceramic material is La 1.9 Yb 0.1 Zr1.8Ce 0.2 O 7 Or La 1.8 Yb 0.2 Zr1.9Ce 0.1 O 7 Or
La 1.9 Yb 0.1 Zr1.9Ce 0.1 O 7 Or La 1.8 Yb 0.2 Zr1.8Ce 0.2 O 7 Or La 1.7 Yb 0.3 Zr1.9Ce 0.1 O 7 Or
La 1.9 Yb 0.1 Zr1.7Ce 0.3 O 7 。
3. Yb according to claim 13+/Ce4+Codope La2Zr2O7High-temperature flame-proof thermal insulation ceramics material, it is characterised in that:
The chemical composition of the ceramic material is La 2 Zr1.8Ce 0.2 O 7 Or La 1.5 Yb 0.5 Zr2O 7 Or La 2 Zr2O 7 Or
La 1.5 Yb 0.5 Zr1.5Ce 0.5 O 7 Or La 1.6 Yb 0.4 Zr1.7Ce 0.3 O 7 Or La 2 Zr1.5Ce 0.5 O 7 。
4. a kind of Yb as described in claim 13+/Ce4+Codope La2Zr2O7The preparation side of high-temperature flame-proof thermal insulation ceramics material
Method, which comprises the following steps:
(1) according to La 2-x Yb x Zr2-yCe y O 7 Chemical composition, by mol ratio be (2-x): x:(2-y): the La (NO of y3)3·
6H2O、Yb(NO3)3·6H2O、Zr(NO3)4·5H2O, ammonium ceric nitrate (NH4)2Ce(NO3)6It is dissolved in deionized water and obtains metal
Nitrate solution, wherein 0≤x≤0.5,0≤y≤0.5, the amount of deionized water are that metal ion is total in metal-nitrate solutions
3.5 ~ 6.5 times of molal quantity claim according still further to 1.2 ~ 3.6 times of ratio of the metal ion total mole number in metal-nitrate solutions
Monohydrate potassium is taken, and is added it in above-mentioned metal-nitrate solutions, mixed solution is obtained；
(2) mixed solution that step (1) obtains is placed on magnetic stirring apparatus, heating evaporation obtains transparent gel；
(3) gel made from step (3) is placed in 170~200 °C of baking oven and is kept the temperature, obtain loose porous La 2-x Yb x Zr2- yCe y O 7 Xerogel presoma；
(4) by La 2-x Yb x Zr2-yCe y O 7 Xerogel presoma is placed in 850~950 °C of temperature lower calcinations, finally 1100~
It is heat-treated 4~8 hours at a temperature of 1500 °C and obtains La 2-x Yb x Zr2-yCe y O 7 Ceramic powder to get arrive Yb3+/Ce4+Codope
La2Zr2O7High-temperature flame-proof thermal insulation ceramics material.
5. Yb according to claim 43+/Ce4+Codope La2Zr2O7The preparation method of high-temperature flame-proof thermal insulation ceramics material,
It is characterized by: the heating steaming of mixed solution is heating stirring at a temperature of 75~100 °C in the step (2).
6. Yb according to claim 43+/Ce4+Codope La2Zr2O7The preparation method of high-temperature flame-proof thermal insulation ceramics material,
It is characterized by: soaking time is 8~16 hours in the step (3).
7. Yb according to claim 43+/Ce4+Codope La2Zr2O7The preparation method of high-temperature flame-proof thermal insulation ceramics material,
It is characterized by: calcination time is 6~12 hours in the step (4).
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