CN108752018A - A kind of titanium calcium aluminate-aluminium titanates complex phase ceramic and preparation method thereof - Google Patents
A kind of titanium calcium aluminate-aluminium titanates complex phase ceramic and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of titanium calcium aluminate-aluminium titanates complex phase ceramics and preparation method thereof.Its technical solution is：Titanium calcium aluminate frit is kept the temperature 3~4 hours under the conditions of 1400~1450 DEG C, cooling, grinding obtains titanium Calcium aluminates powder.By titanium Calcium aluminates powder: alpha-alumina powder: the mass ratio of cerium oxide powder is 1: (0.10~0.15): (0.01~0.03) dispensing, mixing, levigate, ball milling obtain mixture I.Mixture I is kept the temperature under the conditions of 1400~1450 DEG C, cooling, grinding obtains mixture II.By mixture II: the mass ratio of polyvinyl alcohol is 1: (0.01~0.03) dispensing, mixing, the mechanical pressing under the conditions of 140~170MPa keep the temperature 1~3 hour under the conditions of 1400~1450 DEG C, cooling, and titanium calcium aluminate-aluminium titanates complex phase ceramic is made.The present invention has the characteristics that comprehensive utilization of resources and energy conservation and environmental protection, and prepared titanium calcium aluminate-aluminium titanates complex phase ceramic coefficient of thermal expansion is small, thermal coefficient is small and bending strength is larger.
Description
Technical field
The invention belongs to complex phase ceramic technical fields.More particularly to a kind of titanium calcium aluminate-aluminium titanates complex phase ceramic and its system
Preparation Method.
Background technology
Aluminium titanates is Al2O3-TiO2It is resistance in unique compound in binary system, and the low-expansion material that is currently known
A kind of best ceramic structure material of high-temperature behavior has high-melting-point, low thermal coefficient of expansion, low thermal conductivity coefficient and good heat resistanceheat resistant
Impact property；In addition, aluminium titanates can use under the conditions of violent rapid heat cycle, and to molten steel, slag, copper liquid, copper ashes, aluminium
Liquid etc. has the characteristics that excellent corrosion resistance and alkali resistance.Titanium calcium aluminate is one kind with CA6With Ca ((Al0.84Ti0.16)2)6O19
For the composite phase refractory of principal crystalline phase, and during heating, rutile object is met from Ca ((Al0.84Ti0.16)2)6O19Middle precipitation
Out, it is present in CA6The periphery of crystal grain, with high refractoriness, low abrasion amount, high-melting-point, lower thermal conductivity and low thermal expansion system
The features such as number.If by solid sintering technology, the good characteristic of titanium calcium aluminate and aluminium titanates is compound, a kind of titanium calcium aluminate-is formed
Aluminium titanates complex phase ceramic, it is with important application prospects.
" a kind of novel aluminium titanates complex phase ceramic " (CN104045342A) patented technology, with corundum, aluminium titanates, fluorite, two
Titanium oxide, serpentine, talcum, mountain flour etc. prepare aluminium titanates complex phase ceramic as raw material, and the raw material type of use is various, raw material it
Between reaction inconvenience control, and because raw material introduce impurity the calorifics mechanical property of complex phase ceramic is adversely affected；It is " a kind of low
Expand diphase ceramic material " (CN104140249A) patented technology, with chromium oxide, three fulminuric acid esters, rubber, flyash,
Aluminium titanates, corundum, conch shell powder, sodium chromium pyroxene etc. prepare low bulk diphase ceramic material as raw material, although by metatitanic acid
The extension that the Second Phase Particles such as chromium oxide hinder crackle is introduced in aluminium base material, to improve the thermal shock resistance of material, but
It is that raw material type is various, the impurity content introduced by raw material is higher, is unfavorable for the raising of mechanics of materials intensity.
Invention content
Present invention aims at provide a kind of comprehensive utilization of resources and energy-saving and environment-friendly titanium calcium aluminate-aluminium titanates complex phase ceramic
Preparation method, have that coefficient of thermal expansion is small, thermal coefficient is small with titanium calcium aluminate-aluminium titanates complex phase ceramic prepared by this method and
The larger feature of bending strength.
To achieve the above object, the technical solution adopted by the present invention is：
Titanium calcium aluminate frit is kept the temperature 3~4 hours under the conditions of 1400~1450 DEG C, furnace cooling is crushed, is ground to grain
Degree≤0.048mm obtains titanium Calcium aluminates powder.
By the titanium Calcium aluminates powder: alpha-alumina powder: the mass ratio of cerium oxide powder is 1: (0.10~0.15):
(0.01~0.03) mixes the titanium Calcium aluminates powder, the alpha-alumina powder and the cerium oxide powder, in vibromill
Levigate 3~4 hours, ball milling 2~3 hours obtained mixture I.
The mixture I is kept the temperature 1~2 hour under the conditions of 1400~1450 DEG C, furnace cooling, be ground to granularity≤
0.048mm obtains mixture II.
By mixture II: the mass ratio of polyvinyl alcohol is 1: (0.01~0.03), by the mixture II and the poly- second
Enol mixes 1~2 hour, the mechanical pressing under the conditions of 140~170MPa, and it is small that 1~3 is kept the temperature under the conditions of 1400~1450 DEG C
When, titanium calcium aluminate-aluminium titanates complex phase ceramic is made in furnace cooling.
The main chemical compositions of the titanium calcium aluminate frit are：Al2O3>=74.18wt%, CaO >=11.69wt%, TiO2
>=11.08wt%；Granularity≤30mm of the titanium calcium aluminate frit.
The Al of the alpha-alumina powder2O3Content >=99.51wt%；The granularity of the alpha-alumina powder≤
0.048mm。
The CeO of the cerium oxide powder2Content >=99.62wt%；Granularity≤0.048mm of the cerium oxide powder.
Due to the adoption of the above technical scheme, the present invention has the positive effect that：
(1) the titanium calcium aluminate used in the present invention is that the ferrotianium slag generated by smelting ferro-titanium obtains after further treatment,
Abundance has the characteristics that comprehensive utilization of resources and energy conservation and environmental protection.
(2) CA in titanium calcium aluminate6Crystal grain can inhibit growing up for aluminum titanate grains, and aluminum titanate grains is made to become smaller, and cause
Composite material grain refining, to which the micro-crack size generated becomes smaller, quantity reduces so that made complex phase ceramic intensity improves.
(3) it is relatively multiple to effectively reduce the rutile object that precipitation generates in titanium calcium aluminate heating process for the generation of aluminium titanates
The adverse effect of phase ceramics, to improve the mechanics thermal property of material.For example, rutile object mutually has higher thermal expansion system
Number is easy to ambient and coefficient of thermal expansion mismatch mutually occurs and the generation that leads to crackle.
Titanium calcium aluminate-aluminium titanates complex phase ceramic prepared by the present invention is after testing：20~1000 DEG C of average thermal expansion system
Number is 4.4~4.9 × 10-6/℃；Thermal coefficient is 1.1~1.6Wm-1·K-1(1000℃)；Bending strength be 105~
115MPa。
Therefore, the present invention has the characteristics that comprehensive utilization of resources and energy conservation and environmental protection, prepared titanium calcium aluminate-aluminium titanates are multiple
Phase ceramics coefficient of thermal expansion is small, thermal coefficient is small and bending strength is larger.
Specific implementation mode
The invention will be further described With reference to embodiment, not to the limitation of its protection domain.
It is first that the raw material Unify legislation involved by present embodiment is as follows to avoid repeating, it is no longer superfluous in embodiment
It states：
The main chemical compositions of the titanium calcium aluminate frit are：Al2O3>=74.18wt%, CaO >=11.69wt%, TiO2
>=11.08wt%；Granularity≤30mm of the titanium calcium aluminate frit.
The Al of the alpha-alumina powder2O3Content >=99.51wt%；The granularity of the alpha-alumina powder≤
0.048mm。
The CeO of the cerium oxide powder2Content >=99.62wt%；Granularity≤0.048mm of the cerium oxide powder.
Embodiment 1
A kind of titanium calcium aluminate-aluminium titanates complex phase ceramic and preparation method thereof.Preparation method described in the present embodiment is：
Titanium calcium aluminate frit is kept the temperature 3~4 hours under the conditions of 1400~1450 DEG C, furnace cooling is crushed, is ground to grain
Degree≤0.048mm obtains titanium Calcium aluminates powder.
By the titanium Calcium aluminates powder: alpha-alumina powder: the mass ratio of cerium oxide powder is 1: (0.10~0.12):
(0.025~0.03) mixes the titanium Calcium aluminates powder, the alpha-alumina powder and the cerium oxide powder, vibromill
Interior levigate 3~4 hours, ball milling 2~3 hours obtained mixture I.
The mixture I is kept the temperature 1~2 hour under the conditions of 1400~1450 DEG C, furnace cooling, be ground to granularity≤
0.048mm obtains mixture II.
By mixture II: the mass ratio of polyvinyl alcohol is 1: (0.01~0.016), by the mixture II and the poly- second
Enol mixes 1~2 hour, the mechanical pressing under the conditions of 140~149MPa, and it is small that 1~1.6 is kept the temperature under the conditions of 1400~1430 DEG C
When, titanium calcium aluminate-aluminium titanates complex phase ceramic is made in furnace cooling.
Titanium calcium aluminate-aluminium titanates complex phase ceramic prepared by the present embodiment is after testing：20~1000 DEG C of average thermal expansion
Coefficient is 4.7~4.9 × 10-6/℃；Thermal coefficient is 1.1~1.3Wm-1·K-1(1000℃)；Bending strength be 105~
109MPa。
Embodiment 2
A kind of titanium calcium aluminate-aluminium titanates complex phase ceramic and preparation method thereof.Preparation method described in the present embodiment is：
Titanium calcium aluminate frit is kept the temperature 3~4 hours under the conditions of 1400~1450 DEG C, furnace cooling is crushed, is ground to grain
Degree≤0.048mm obtains titanium Calcium aluminates powder.
By the titanium Calcium aluminates powder: alpha-alumina powder: the mass ratio of cerium oxide powder is 1: (0.11~0.13):
(0.020~0.026) mixes the titanium Calcium aluminates powder, the alpha-alumina powder and the cerium oxide powder, vibromill
Interior levigate 3~4 hours, ball milling 2~3 hours obtained mixture I.
The mixture I is kept the temperature 1~2 hour under the conditions of 1400~1450 DEG C, furnace cooling, be ground to granularity≤
0.048mm obtains mixture II.
By mixture II: the mass ratio of polyvinyl alcohol is 1: (0.015~0.021), by the mixture II and described poly-
Vinyl alcohol mix 1~2 hour, the mechanical pressing under the conditions of 148~157MPa, under the conditions of 1420~1450 DEG C keep the temperature 1.5~
2.1 hours, titanium calcium aluminate-aluminium titanates complex phase ceramic was made in furnace cooling.
Titanium calcium aluminate-aluminium titanates complex phase ceramic prepared by the present embodiment is after testing：20~1000 DEG C of average thermal expansion
Coefficient is 4.6~4.8 × 10-6/℃；Thermal coefficient is 1.2~1.4Wm-1·K-1(1000℃)；Bending strength be 107~
111MPa。
Embodiment 3
A kind of titanium calcium aluminate-aluminium titanates complex phase ceramic and preparation method thereof.Preparation method described in the present embodiment is：
Titanium calcium aluminate frit is kept the temperature 3~4 hours under the conditions of 1400~1450 DEG C, furnace cooling is crushed, is ground to grain
Degree≤0.048mm obtains titanium Calcium aluminates powder.
By the titanium Calcium aluminates powder: alpha-alumina powder: the mass ratio of cerium oxide powder is 1: (0.12~0.14):
(0.015~0.021) mixes the titanium Calcium aluminates powder, the alpha-alumina powder and the cerium oxide powder, vibromill
Interior levigate 3~4 hours, ball milling 2~3 hours obtained mixture I.
The mixture I is kept the temperature 1~2 hour under the conditions of 1400~1450 DEG C, furnace cooling, be ground to granularity≤
0.048mm obtains mixture II.
By mixture II: the mass ratio of polyvinyl alcohol is 1: (0.02~0.026), by the mixture II and the poly- second
Enol mixes 1~2 hour, the mechanical pressing under the conditions of 156~165MPa, and 2.0~2.6 are kept the temperature under the conditions of 1400~1430 DEG C
Hour, titanium calcium aluminate-aluminium titanates complex phase ceramic is made in furnace cooling.
Titanium calcium aluminate-aluminium titanates complex phase ceramic prepared by the present embodiment is after testing：20~1000 DEG C of average thermal expansion
Coefficient is 4.4~4.6 × 10-6/℃；Thermal coefficient is 1.4~1.6Wm-1·K-1(1000℃)；Bending strength be 111~
115MPa。
Embodiment 4
A kind of titanium calcium aluminate-aluminium titanates complex phase ceramic and preparation method thereof.Preparation method described in the present embodiment is：
Titanium calcium aluminate frit is kept the temperature 3~4 hours under the conditions of 1400~1450 DEG C, furnace cooling is crushed, is ground to grain
Degree≤0.048mm obtains titanium Calcium aluminates powder.
By the titanium Calcium aluminates powder: alpha-alumina powder: the mass ratio of cerium oxide powder is 1: (0.13~0.15):
(0.01~0.016) mixes the titanium Calcium aluminates powder, the alpha-alumina powder and the cerium oxide powder, vibromill
Interior levigate 3~4 hours, ball milling 2~3 hours obtained mixture I.
The mixture I is kept the temperature 1~2 hour under the conditions of 1400~1450 DEG C, furnace cooling, be ground to granularity≤
0.048mm obtains mixture II.
By mixture II: the mass ratio of polyvinyl alcohol is 1: (0.025~0.03), by the mixture II and the poly- second
Enol mixes 1~2 hour, the mechanical pressing under the conditions of 165~170MPa, and it is small that 2.5~3 are kept the temperature under the conditions of 1420~1450 DEG C
When, titanium calcium aluminate-aluminium titanates complex phase ceramic is made in furnace cooling.
Titanium calcium aluminate-aluminium titanates complex phase ceramic prepared by the present embodiment is after testing：20~1000 DEG C of average thermal expansion
Coefficient is 4.5~4.7 × 10-6/℃；Thermal coefficient is 1.3~1.5Wm-1·K-1(1000℃)；Bending strength be 109~
113MPa。
Present embodiment compared with prior art, has the positive effect that：
(1) the titanium calcium aluminate used in present embodiment is passed through further by the ferrotianium slag that smelting ferro-titanium generates
Reason obtains, and abundance has the characteristics that comprehensive utilization of resources and energy conservation and environmental protection.
(2) CA in titanium calcium aluminate6Crystal grain can inhibit growing up for aluminum titanate grains, and aluminum titanate grains is made to become smaller, and cause
Composite material grain refining, to which the micro-crack size generated becomes smaller, quantity reduces so that made complex phase ceramic intensity improves.
(3) it is relatively multiple to effectively reduce the rutile object that precipitation generates in titanium calcium aluminate heating process for the generation of aluminium titanates
The adverse effect of phase ceramics, to improve the mechanics thermal property of material.For example, rutile object mutually has higher thermal expansion system
Number is easy to ambient and coefficient of thermal expansion mismatch mutually occurs and the generation that leads to crackle.
Titanium calcium aluminate-aluminium titanates complex phase ceramic prepared by present embodiment is after testing：20~1000 DEG C are averaged
Coefficient of thermal expansion is 4.4~4.9 × 10-6/℃；Thermal coefficient is 1.1~1.6Wm-1·K-1(1000℃)；Bending strength is
105~115MPa.
Therefore, present embodiment has the characteristics that comprehensive utilization of resources and energy conservation and environmental protection, prepared titanium calcium aluminate-
Aluminium titanates complex phase ceramic coefficient of thermal expansion is small, thermal coefficient is small and bending strength is larger.
Claims (5)
1. a kind of preparation method of titanium calcium aluminate-aluminium titanates complex phase ceramic, it is characterised in that：By titanium calcium aluminate frit in 1400~
3~4 hours are kept the temperature under the conditions of 1450 DEG C, furnace cooling is crushed, is ground to granularity≤0.048mm, obtains titanium Calcium aluminates powder；
By the titanium Calcium aluminates powder: alpha-alumina powder: the mass ratio of cerium oxide powder is 1: (0.10~0.15): (0.01
~0.03), the titanium Calcium aluminates powder, the alpha-alumina powder and the cerium oxide powder are mixed, levigate 3 in vibromill
~4 hours, ball milling 2~3 hours obtained mixture I；
The mixture I is kept the temperature 1~2 hour under the conditions of 1400~1450 DEG C, furnace cooling, be ground to granularity≤
0.048mm obtains mixture II；
By mixture II: the mass ratio of polyvinyl alcohol is 1: (0.01~0.03), by the mixture II and the polyvinyl alcohol
Mixing 1~2 hour, the mechanical pressing under the conditions of 140~170MPa keeps the temperature 1~3 hour under the conditions of 1400~1450 DEG C, with
But, titanium calcium aluminate-aluminium titanates complex phase ceramic is made in furnace cooling.
2. the preparation method of titanium calcium aluminate-aluminium titanates complex phase ceramic according to claim 1, it is characterised in that the titanium aluminium
The main chemical compositions of sour calcium frit are：Al2O3>=74.18wt%, CaO >=11.69wt%, TiO2>=11.08wt%；It is described
Granularity≤30mm of titanium calcium aluminate frit.
3. the preparation method of titanium calcium aluminate-aluminium titanates complex phase ceramic according to claim 1, it is characterised in that the α-oxygen
Change the Al of aluminium powder body2O3Content >=99.51wt%；Granularity≤0.048mm of the alpha-alumina powder.
4. the preparation method of titanium calcium aluminate-aluminium titanates complex phase ceramic according to claim 1, it is characterised in that the oxidation
The CeO of cerium powder2Content >=99.62wt%；Granularity≤0.048mm of the cerium oxide powder.
5. a kind of titanium calcium aluminate-aluminium titanates complex phase ceramic, it is characterised in that the titanium calcium aluminate-aluminium titanates complex phase ceramic is basis
Titanium aluminic acid prepared by the preparation method of titanium calcium aluminate-aluminium titanates complex phase ceramic described in any one of Claims 1 to 4 item
Calcium-aluminium titanates complex phase ceramic.
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| CN112759416A (en) * | 2021-01-15 | 2021-05-07 | 武汉科技大学 | Calcium hexaluminate/aluminum titanate porous ceramic and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112759416A (en) * | 2021-01-15 | 2021-05-07 | 武汉科技大学 | Calcium hexaluminate/aluminum titanate porous ceramic and preparation method thereof |
| CN112759416B (en) * | 2021-01-15 | 2023-01-17 | 武汉科技大学 | Calcium hexaluminate/aluminum titanate porous ceramic and preparation method thereof |
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