CN105819851A - Aluminum titanate honeycomb ceramic material and preparation method thereof - Google Patents
Aluminum titanate honeycomb ceramic material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an aluminum titanate honeycomb ceramic material and a preparation method thereof. The method comprises the following steps: weighing alumina and talcum powder in proportion, and uniformly stirring alumina and the talcum powder; adding titanium oxide, a barium-containing compound and silica which are weighed in proportion; adding a shaping agent and a pore forming agent which are weighed in proportion, and fully stirring; adding pure water and an extrusion aid which are weighed in proportion, and fully stirring; pugging the above obtained pug, removing impurities, and carrying out extrusion molding to obtain a honeycomb ceramic body; and drying the honeycomb ceramic body, and sintering the dried honeycomb ceramic body to obtain the final aluminum titanate honeycomb ceramic product. The honeycomb ceramic material has the advantages of simple and controllable preparation flow, economical raw material cost and high finished product strength. The aluminum titanate honeycomb ceramic prepared through the method, having an extremely low (near zero) thermal expansion coefficient and 1450DEG C or above refractoriness, can meet requirements of use of the engine exhaust gas purifiers for heat intensity and the thermal shock property.
Description
Technical field
The present invention relates to ceramic field, particularly relate to a kind of ceramic material and preparation method thereof.
Background technology
Along with modern industry and the fast development of science and technology, to having simultaneously, excellent high temperature resistant and thermal shock resistance ceramic material demand is the most urgent.As a kind of structural ceramic material aluminium titanates (Al that resistance to elevated temperatures in the low thermal expansion material being currently known is best2Ti05, it is called for short AT), because it has high-melting-point (1860 DEG C), low thermal coefficient of expansion [Kα 20～1000 DEG C=(0.5～1.5) × 10-6℃-1], good thermal shock resistance, anti-corrosion, alkaline-resisting excellent properties, and less expensive and receive much attention.Zhejiang University week woods equality people thinks in " material of aluminum titanate summary ", aluminium titanates is pseudobrookite structural group compound, belong to rhombic system, its crystal thermal coefficient of expansion in different directions is dramatically different, therefore after burning till cooling, owing to internal stress is excessive, produce substantial amounts of micro-crack in inside.In aluminium titanates crystal structure, each aluminium ion and titanium ion are formed octahedral six oxygen atoms and are surrounded and be positioned at octahedral center, these TiO6Or AlO6On a axle, b direction of principal axis, being connected with common edge, on C direction of principal axis, 3 octahedral summits are connected to form continuous print chain, and each chain infinitely extends in space, and intersect connection, form space net structure.This space net structure is macroscopically showing relatively low thermal coefficient of expansion, but also makes the intensity of sintered body be substantially reduced simultaneously, hinders the extensive application of alumina titanate ceramics.Aluminium titanates is in 750～1300 DEG C of temperature ranges simultaneously, easily resolves into Rutile Type and corundum phase, causes its local internal stress to concentrate and increases with thermal coefficient of expansion, and loses its excellent thermal shock resistance.This two big shortcoming makes the industrialized production of aluminium titanates and application and development difficulty bigger.
Why alumina titanate ceramics has relatively low thermal coefficient of expansion is because the existence of micro-crack and makes it show thermal hysteresis in thermal histories.Aluminium titanates is in heating process, micro-crack is there is in the starting stage due to intra-die, on a, b direction of principal axis, the thermal expansion caused by lattice particle vibration is offset by micro-crack, thus the highly expanded on a, b direction is not exhibited by, the expansion of material macroscopically shows as the low bulk on c-axis direction, and this stage is making up the stage of micro-crack, and material does not show obvious thermal expansion.Along with the rising of temperature, when all of micro-crack of material internal all makes up (about 700 DEG C), high thermal expansion functions to；But now due in material active force between crystal grain and crystal grain strengthen, material internal crystal grain generation particle re-arrangement (850 950 DEG C), make intercrystalline combination tend to tight.The superposition being expanded to both effects of material, its result shows as material has a unusual negative expansion in this temperature range.Temperature continue raise, when the particle re-arrangement of material completes, highly expanded plays a leading role, the expansion of material show as on three axles expand meansigma methods: (αa+αb+αc)/3=9.5 × 10-6℃-1.In the starting stage of cooling procedure, owing to material is still in hot stage, material has certain deformability, and the thermal stress produced in cooling procedure is also not enough makes the micro-crack made up ftracture, thus, now material list reveals the biggest contraction；Along with the decline of temperature, the deformability of material declines, and meanwhile, thermal stress increases accordingly.Time to a certain extent, the effect of thermal stress makes material internal start again micro-crack occur, and these micro-cracks make crystal show volumetric expansion, thus show on thermal dilatometry and reduce with temperature, and material starts the trend expanded.
Along with the development of powder technology of preparing, AT powder synthesis process is a lot, is summed up and can be divided into 3 classes: solid phase method, metal or the liquid phase method of metal alkoxide hydrolysate and chemical gas-phase method.But the preparation majority researcher for aluminum titanate honeycomb pottery is all to add titanium oxide with aluminium oxide, sinters in the case of adding certain stabilizer and obtain.
Patent WO2005/018776 discloses a kind of alkali feldspar, oxide containing Mg spinel structure type or MgO by adding 1～10wt% or changes into the raw material containing Mg compound of MgO by sintering and mix the sintered body being sintered and formed.
United States Patent (USP) US2010/0230870A1 discloses a kind of method stablizing aluminium titanates by interpolation anorthite and strontium Anhydrite, can obtain the aluminum titanate honeycomb pottery with low thermal coefficient of expansion after mixed sintering；
Above patent is all to be solved al titanate sintering body heat decomposed and the problem of low mechanical strength by the adjustment kind of additive, ratio, but above patent comes with some shortcomings: the alkali feldspars of use can reduce the softening temperature of aluminium titanates, increasing its thermal coefficient of expansion, sintering temperature is high, and energy consumption is high.
Summary of the invention
Present invention aim at providing a kind of aluminum titanate honeycomb ceramic material and preparation method thereof, it is possible to prepare the al titanate sintering body with alveolate texture, low thermal coefficient of expansion, preferable mechanical strength and suitable porosity.
For achieving the above object, the aluminum titanate honeycomb ceramic material that the present invention provides, including, aluminium oxide, titanium oxide, metatitanic acid aluminium powder, stabilizer, dispersant, extrusion aid, plastic agent, pore creating material, Yi Jishui；
Described stabilizer farther includes, Talcum, silicon dioxide and containing barium compound；
Count with the primary raw material in addition to water, plastic agent, dispersant, pore creating material, extrusion aid for 100wt%, described aluminium oxide is 45-60wt%, described titanium oxide is 35-45wt%, described Talcum 0.5-7.5wt%, described silicon oxide 0.5-4wt%, described containing barium compound 0-7wt%, described metatitanic acid aluminium powder 0-10wt%；
Organic Ingredients percentage ratio is the proportion accounting for all inorganic raw material total amounts, and described dispersant is 0-5wt%, and described extrusion aid is 0-10wt%, and described plastic agent is 0-5wt%, and described pore creating material is 0-65wt%.
Further, described dispersant is oleic acid or/and potassium laurate.
Further, one or more during described extrusion aid is oleic acid, potassium laurate, glycerol, oleum lini and Oleum Brassicae campestris.
Further, described plastic agent be cellulose, Polyethylene Glycol, polyvinyl alcohol, flour one or more.
Further, described pore creating material be graphite, cellulose, mealy potato, starch, wood powder, flour, paraffin, PMMA, carbon dust one or more.
Further, described containing barium compound be brium carbonate, Barium metatitanate. or Barium monoxide one or more.
For achieving the above object, the aluminum titanate honeycomb ceramic material preparation method that the present invention provides, comprise the following steps:
1) proportionally weighing aluminium oxide, Pulvis Talci, dropping dispersant stirs；
2) titanium oxide proportionally weighed, containing barium compound, silicon dioxide are added；
3) addition proportionally weighs plastic agent, pore creating material are sufficiently stirred for；
4) add the pure water proportionally weighed and extrusion aid is sufficiently stirred for；
5) by described pug pugging, remove impurity, extruded ceramic honey comb base substrate is obtained；
6) sinter after described ceramic honey comb base substrate being dried, obtain aluminum titanate honeycomb pottery end article.
Further, described dispersant is oleic acid or/and potassium laurate；Described extrusion aid is one or more in oleic acid, potassium laurate, glycerol, oleum lini and Oleum Brassicae campestris；Described plastic agent be cellulose, Polyethylene Glycol, polyvinyl alcohol, flour one or more；Described pore creating material be graphite, cellulose, mealy potato, starch, wood powder, flour, paraffin, PMMA, carbon dust one or more.
Further, step 6) described in sintering further include steps of and be raised to 100～180 DEG C with the speed less than 1 DEG C/min from room temperature；With the ramp less than 1.5 DEG C/min to 600～1000 DEG C, it is incubated 1～10h；With the ramp less than 1.5 DEG C/min to 1300～1550 DEG C, it is incubated 2～12h；It is cooled to 600～1200 DEG C with the speed less than 3.5 DEG C/min, stops heating, furnace cooling.
For achieving the above object, aluminum titanate honeycomb pottery prepared by the preparation method described in employing any one of claim 7-9 that the present invention provides, its thermal coefficient of expansion: room temperature to 800 DEG C is-0.5 × 10-6℃-1～2 × 10-8℃-1；Room temperature to 1000 DEG C is-0.9 × 10-6℃-1～0.5 × 10-6℃-1；A diameter of 1～30 μm in its hole, pore wall thickness is 50～300 μm, and porosity is 20～75%, and direction, duct comprcssive strength is more than 15Mpa, and being perpendicular to direction, duct comprcssive strength is 1.6～8Mpa.
The aluminum titanate honeycomb ceramic material of the present invention, there is the advantages such as cost economy, technique are simple, solve the problem that the aluminum titanate honeycomb ceramic machinery intensity caused due to micro-crack reduces and causes thermal coefficient of expansion to increase owing to 1200 DEG C of aluminium titanates decompose, simultaneously by plastic the optimizing and revising of pug can be squeezed out the thin wall honeycomb ceramic of large scale high mesh number.
The aluminum titanate honeycomb pottery that the present invention is finally prepared, pore wall thickness is 50～300 μm, and the pore diameter distribution of pore creating material pore-forming more than 80% is at 1～30 μ m, and porosity is 20～75%, direction, duct comprcssive strength is more than 15Mpa, and being perpendicular to direction, duct comprcssive strength is 1.6～8Mpa.Its thermal coefficient of expansion: room temperature to 800 DEG C is-0.5～0.5 × 10-6℃-1, in the case of condition controls appropriately ,-2～2 × 10 can be reached-8℃-1.Room temperature to 1000 DEG C is-0.9～0.9 × 10-6℃-1, in the case of condition controls appropriately ,-0.5～0.5 × 10 can be reached-6℃-1.The present invention uses Talcum, silicon dioxide, containing barium compound to stablize aluminium titanates so that it is can reduce thermal decomposition when being cooled to 1200 DEG C while not affecting its low thermal coefficient of expansion.Can be obtained the aluminum titanate honeycomb pottery having room temperature to the near-zero thermal expansion of 800 DEG C by method provided by the present invention, the intensity of prepared aluminum titanate honeycomb pottery disclosure satisfy that the strength demand as engine tail gas purification ceramic honey comb.
Accompanying drawing explanation
Fig. 1 is the aluminum titanate honeycomb ceramic material preparation method flow chart according to the present invention；
Fig. 2 is that the aluminum titanate honeycomb ceramic material room temperature according to the present invention is to thermal dilatometry figure when 800 DEG C；
Fig. 3 is that the aluminum titanate honeycomb ceramic material room temperature according to the present invention is to thermal coefficient of expansion curve chart when 1000 DEG C；
Fig. 4 is the XRD figure spectrum of the aluminum titanate honeycomb ceramic material according to the present invention；
Fig. 5 is the scanning electron microscope (SEM) photograph of the 1500 times of amplifications of aluminum titanate honeycomb ceramic material according to the present invention；
Fig. 6 is the scanning electron microscope (SEM) photograph of 5000 times of amplifications of the aluminum titanate honeycomb ceramic material according to the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are illustrated, it will be appreciated that preferred embodiment described herein is merely to illustrate and explains the present invention, is not intended to limit the present invention.
In an embodiment, percentage ratio is mass percent.
The aluminum titanate honeycomb ceramic material of the present invention, raw material components includes, aluminium oxide, metatitanic acid aluminium powder, titanium oxide, stabilizer, lubricant, extrusion aid, plastic agent, pore creating material, water；The granularity of the solid material used is more than 200 mesh；In raw material, aluminium oxide is technical grade, its purity >=99%, and ratio is 45～60wt%；In raw material, metatitanic acid aluminium powder ratio is less than 10wt%；In raw material, titanium oxide is technical grade, its purity >=99%, and ratio is 35～45wt%；In raw material, stabilizer refers to reduce aluminium titanates high temperature thermal decomposition, increases its mechanical strength, improves the material of its thermal coefficient of expansion.Count with the primary raw material in addition to water, plastic agent, dispersant, pore creating material, extrusion aid for 100wt%, other Material Percentage are the proportion accounting for primary raw material total amount, and dispersant is 0-5wt%, and extrusion aid is 0-10wt%, plastic agent is 0-5wt%, and pore creating material is 0-65wt%.
Stabilizer used by the present invention is mainly Talcum, silicon dioxide, containing barium compound, and wherein Talcum ratio is 0.5～7.5wt%；Silica ratios is 0.5～4wt%；Containing barium compound refers to that brium carbonate, Barium metatitanate. maybe can change into containing barium compound or the Barium monoxide of corresponding oxidation barium content, and corresponding barytic ratio is less than 6wt%；
Dispersant in raw material refers to that the amphipathic compound such as oleic acid, potassium laurate can make stock dispersion mixing material evenly；
Extrusion aid in raw material refers to that oleic acid, potassium laurate, glycerol, oleum lini, Oleum Brassicae campestris etc. can improve the material of pug lubricity；
Plastic agent in raw material refers to that cellulose, Polyethylene Glycol, polyvinyl alcohol, flour etc. improve the plastic material of pug；
Pore creating material in raw material refers to that graphite, cellulose, mealy potato, starch, wood powder, flour, paraffin, PMMA, carbon dust etc. can make pottery produce the material of hole in sintering process；
Water in raw material refers to once above distilled water or the resistivity deionized water more than 15M Ω；
Table 1 be embodiment 1～27 concrete raw material in class and corresponding proportioning (counting with the primary raw material in addition to water, plastic agent, dispersant, pore creating material, extrusion aid for 100wt%, other Material Percentage are the proportion accounting for primary raw material total amount):
The ratio of the concrete raw material of table 1 embodiment 1～27
Fig. 1 is the aluminum titanate honeycomb ceramic material preparation method flow chart according to the present invention, below with reference to Fig. 1, is described in detail the aluminum titanate honeycomb ceramic material preparation method of the present invention.
First, in step 101, proportionally weigh aluminium oxide, Pulvis Talci mixing be sufficiently stirred for；
In step 102, proportionally weigh titanium oxide, containing barium compound, silicon dioxide, and join in the mixture of step 101 gained；
In step 103, proportionally weigh cellulose, and join in the mixture of step 102 gained；
In step 104, step 103 gained mixture adds the pure water stirring proportionally weighed, add the potassium laurate stirring proportionally weighed, add the oleum lini stirring proportionally weighed, obtain that there is preferable plastic pug；
In step 105: after pug step 104 obtained puts in vacuum deairing machine vacuum pugging and remove impurity twice；Carry out extruded with extruder, obtain ceramic honey comb base substrate；
In step 106: use microwave to be dried extruded ceramic body, obtain the ceramic body being dried；
In step 107: dried ceramic honey comb base substrate is put in agglomerating plant and is sintered；
In step 108: come out of the stove and obtain aluminum titanate honeycomb pottery end article.
The preparation method of the aluminum titanate honeycomb pottery of the present invention, the temperature of step 107 sintering process is arranged and heating rate is: be raised to 100～180 DEG C with the speed less than 1 DEG C/min from room temperature；With the ramp less than 1.5 DEG C/min to 600～1000 DEG C, it is incubated 1～10h；With the ramp less than 1.5 DEG C/min to 1300～1550 DEG C, it is incubated 2～12h；It is cooled to 600～1200 DEG C with the speed less than 3.5 DEG C/min, stops heating, furnace cooling.
Preferably, sintering process is: 1, be raised to 150 DEG C with the heating rate of 0.5 DEG C/min from room temperature；2,600 DEG C are risen to the heating rate of 0.6/min；3, rise to 850 DEG C with 0.8 DEG C/min, be incubated 4h；4, rise to 1450 DEG C with 0.6 DEG C/min, be incubated 6h；5,800 DEG C it are cooled to, last furnace cooling.
Alumina titanate ceramics prepared by the present invention is for having cellular porous sintered body, and during room temperature to 800 DEG C, thermal coefficient of expansion is-0.5～0.5 × 10-6℃-1, it is preferable that-2～2 × 10 can be reached-8℃-1；When room temperature is to 1000 DEG C, thermal coefficient of expansion is-0.9～0.9 × 10-6℃-1, it is preferable that-0.5～0.5 × 10 can be reached-6℃-1.(3.8～186) hole/cm2(25～1200CPSI), it is preferable that 62 holes/cm2；Pore wall thickness is about 50～300 μm, it is preferable that pore wall thickness 150 μm；The pore diameter distribution of more than 80% is at 1～30 μ m, and porosity is 20～75%, and preferably porosity is 30%；Direction, duct comprcssive strength is more than 15Mpa, and being perpendicular to direction, duct comprcssive strength is 1.6～8Mpa, preferably position 7MPa.
Fig. 2 be the aluminum titanate honeycomb ceramic material room temperature according to the present invention to thermal dilatometry figure when 800 DEG C, as in figure 2 it is shown, the thermal dilatometry that C1～C7 is room temperature-800 DEG C, corresponding thermal coefficient of expansion is C1:1.0224 × 10-6℃-1, C2:0.1385 × 10-6℃-1, C3:0.0879 × 10-6℃-1, C4:0.0238 × 10-6℃-1, C5:-0.0411 × 10-6℃-1, C6:-0.3046 × 10-6℃-1, C7:-0.6267 × 10-6℃-1。
Fig. 3 be the aluminum titanate honeycomb ceramic material room temperature according to the present invention to thermal coefficient of expansion curve chart when 1000 DEG C, as it is shown on figure 3, A1, A2, B3, B4 room temperature is to 1000 DEG C of thermal dilatometry, corresponding thermal coefficient of expansion is A1:0.6978 × 10-6℃-1, A2:0.5944 × 10-6℃-1, B1:0.2598 × 10-6℃-1, B2:-0.1781 × 10-6℃-1。
Fig. 4 is the XRD figure spectrum of the aluminum titanate honeycomb ceramic material according to the present invention, and as shown in Figure 4,1～12 is the diffraction maximum that aluminium titanates is corresponding, and 13,14 is the diffraction maximum of aluminium oxide.Predominantly aluminium titanates phase and small amounts aluminum phase is can be seen that from accompanying drawing 4.Talcum in raw material, silicon oxide, containing barium compound one or more as stabilizer, the network structure of aluminium titanates may be stablized after sintering with the composite structure of the many oxides such as aluminium oxide, silicon oxide, magnesium oxide, Barium monoxide.
Fig. 5 is the scanning electron microscope (SEM) photograph of the 1500 times of amplifications of aluminum titanate honeycomb ceramic material according to the present invention, Fig. 6 is the scanning electron microscope (SEM) photograph of 5000 times of amplifications of the aluminum titanate honeycomb ceramic material according to the present invention, from Fig. 5 and 6 it can be seen that the pore diameter distribution of more than 80% is in 1～30 μ m.
One of ordinary skill in the art will appreciate that: the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention, although the present invention being described in detail with reference to previous embodiment, for a person skilled in the art, the technical scheme that foregoing embodiments is recorded still can be modified by it, or wherein portion of techniques feature is carried out equivalent.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. an aluminum titanate honeycomb ceramic material, it is characterised in that described aluminum titanate honeycomb ceramic material, including, aluminium oxide, titanium oxide, metatitanic acid aluminium powder, stabilizer, dispersant, extrusion aid, plastic agent, pore creating material, Yi Jishui；
Described stabilizer farther includes, Talcum, silicon dioxide and containing barium compound；
Count with the primary raw material in addition to water, plastic agent, dispersant, pore creating material, extrusion aid for 100wt%, described aluminium oxide is 45-60wt%, described titanium oxide is 35-45wt%, described Talcum 0.5-7.5wt%, described silicon oxide 0.5-4wt%, described containing barium compound 0-7wt%, described metatitanic acid aluminium powder 0-10wt%；
Organic Ingredients percentage ratio is the proportion accounting for all inorganic raw material total amounts, and described dispersant is 0-5wt%, and described extrusion aid is 0-10wt%, and described plastic agent is 0-5wt%, and described pore creating material is 0-65wt%.
Aluminum titanate honeycomb ceramic material the most according to claim 1, it is characterised in that described dispersant is oleic acid or/and potassium laurate.
Aluminum titanate honeycomb ceramic material the most according to claim 1, it is characterised in that described extrusion aid is one or more in oleic acid, potassium laurate, glycerol, oleum lini and Oleum Brassicae campestris.
Aluminum titanate honeycomb ceramic material the most according to claim 1, it is characterised in that described plastic agent be cellulose, Polyethylene Glycol, polyvinyl alcohol or flour one or more.
Aluminum titanate honeycomb ceramic material the most according to claim 1, it is characterised in that described pore creating material be graphite, cellulose, mealy potato, starch, wood powder, flour, paraffin, PMMA or carbon dust one or more.
Aluminum titanate honeycomb ceramic material the most according to claim 1, it is characterised in that described containing barium compound be brium carbonate, Barium metatitanate. or Barium monoxide one or more.
7. a preparation method for aluminum titanate honeycomb ceramic material, comprises the following steps:
1) proportionally weighing aluminium oxide, Pulvis Talci, dropping dispersant stirs；
2) titanium oxide proportionally weighed, containing barium compound, silicon dioxide are added；
3) addition proportionally weighs plastic agent, pore creating material are sufficiently stirred for；
4) add the pure water proportionally weighed and extrusion aid is sufficiently stirred for；
5) by described pug pugging, remove impurity, extruded ceramic honey comb base substrate is obtained；
6) sinter after described ceramic honey comb base substrate being dried, obtain aluminum titanate honeycomb pottery end article.
Aluminum titanate honeycomb ceramic material preparation method the most according to claim 7, it is characterised in that described dispersant is oleic acid or/and potassium laurate；Described extrusion aid is one or more in oleic acid, potassium laurate, glycerol, oleum lini and Oleum Brassicae campestris；Described plastic agent is one or more of cellulose, Polyethylene Glycol, polyvinyl alcohol or flour；Described pore creating material is one or more of graphite, cellulose, mealy potato, starch, wood powder, flour, paraffin, PMMA or carbon dust.
Aluminum titanate honeycomb ceramic material preparation method the most according to claim 7, it is characterised in that the sintering described in step 6) further includes steps of and is raised to 100～180 DEG C with the speed less than 1 DEG C/min from room temperature；With the ramp less than 1.5 DEG C/min to 600～1000 DEG C, it is incubated 1～10h；With the ramp less than 1.5 DEG C/min to 1300～1550 DEG C, it is incubated 2～12h；It is cooled to 600～1200 DEG C with the speed less than 3.5 DEG C/min, stops heating, furnace cooling.
10. the aluminum titanate honeycomb pottery that prepared by the preparation method used described in any one of claim 7-9, it is characterised in that described aluminum titanate honeycomb pottery, its thermal coefficient of expansion: room temperature to 800 DEG C is-0.5 × 10-6℃-1～2 × 10-8℃-1；Room temperature to 1000 DEG C is-0.9 × 10-6℃-1～0.5 × 10-6℃-1；A diameter of 1～30 μm in its hole, pore wall thickness is 50～300 μm, and porosity is 20～75%, and direction, duct comprcssive strength is more than 15Mpa, and being perpendicular to direction, duct comprcssive strength is 1.6～8Mpa.
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| CN108484161A (en) * | 2018-06-20 | 2018-09-04 | 上海定向材料科技有限公司 | A kind of aluminium titanate composite material and preparation method thereof |
| CN111548135A (en) * | 2020-05-23 | 2020-08-18 | 湖南德腾环保科技有限公司 | Honeycomb ceramic carrier and preparation method and application thereof |
| CN112174688A (en) * | 2020-09-29 | 2021-01-05 | 北京科技大学 | Method for preparing aluminum titanate composite porous ceramic by adopting two-step solid-phase sintering process |
| CN116693324A (en) * | 2023-08-07 | 2023-09-05 | 天津南极星隔热材料有限公司 | Preparation method of lightweight heat-insulating aluminum titanate porous ceramic with multistage pore structure |
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| CN116693324A (en) * | 2023-08-07 | 2023-09-05 | 天津南极星隔热材料有限公司 | Preparation method of lightweight heat-insulating aluminum titanate porous ceramic with multistage pore structure |
| CN116693324B (en) * | 2023-08-07 | 2023-10-13 | 天津南极星隔热材料有限公司 | Preparation method of lightweight heat-insulating aluminum titanate porous ceramic with multistage pore structure |
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