CN102153335A - Machinable aluminium oxide ceramics and preparation method of machinable aluminium oxide ceramics - Google Patents
Machinable aluminium oxide ceramics and preparation method of machinable aluminium oxide ceramics Download PDFInfo
- Publication number
- CN102153335A CN102153335A CN 201110082535 CN201110082535A CN102153335A CN 102153335 A CN102153335 A CN 102153335A CN 201110082535 CN201110082535 CN 201110082535 CN 201110082535 A CN201110082535 A CN 201110082535A CN 102153335 A CN102153335 A CN 102153335A
- Authority
- CN
- China
- Prior art keywords
- alumina
- oxide
- preparation
- percent
- aluminium oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses machinable aluminium oxide ceramics which is characterized in that the machinable aluminium oxide ceramics comprises the following components in percentage by mass: 60 percent to 68 percent of nano alumina, 30 percent to 36 percent of tabular alumina, 0.5 percent to 1.5 percent of magnesium oxide and 1 percent to 3 percent of titanium dioxide. A preparation method of the ceramics comprises the following steps of: preparing the nano alumina; after carrying out mixing and ball milling on the nano alumina, alumina, the magnesium oxide, titanium dioxide and absolute ethyl alcohol, drying the mixture, removing zirconium oxide grinding balls, and carrying out roasting, washing, filtering and drying on the obtained product to obtain composite powder; and after uniformly mixing the composite powder and a polyvinyl alcohol 1799 binder and pelleting the obtained mixture, carrying out dry-pressing forming to obtain a green body and placing the formed green body into a high temperature furnace to carry out sintering so as to obtain the ceramics. The bending strength of the ceramics reaches 526MPa. The fracture toughness of the ceramics reaches 6.4MPa.m1/2. The ceramics have excellent machinable performance. The problems of complex structure and high cost and difficultly-controlled preparation process of the existing machinable ceramics are effectively solved.
Description
Technical field
The invention belongs to the aluminum oxide is pottery of base-material and preparation method thereof, but relates to a kind of processed alumina pottery and preparation method thereof.The alumina-ceramic of preparation has good processability.
Background technology
Processable ceramic: be meant at room temperature, utilize traditional machine-tooled method (as Wimet or Rapid Steel Tool) can process and reach the stupalith of certain machined surface quality requirement.General processing rear surface roughness requires less than 10 μ m.Alumina-ceramic hardness height, wear-resistant, high temperature resistant, have good chemical stability and electrical insulating property, and cheap, raw material sources are wide, are most widely used stupaliths.
But, because the associative key of stupalith is based on ionic linkage and covalent linkage, the potential barrier of dislocation is very high, the toughness of material is very poor, cause its fragility big, crack sensitivity is strong, brittle rupture often appears in engineering is used, the weakness that this is fatal, cause it can not stand huge mechanical shock and thermal shocking, and the pottery behind the sintering will be reprocessed, has only the employing diamond, superhard cutters such as cubic boron nitride, or by some New Processing such as laser processing, plasma process, electrospark machining, ultrasonic machining waits and realizes, has caused stupalith post-production cost height, difficulty is big, precision is low.
How to stop the growth of crackle, just place hope on a series of toughening mechanism: crackle bridging, crack deflection, phase transformation etc.Up to the present, a large amount of processable ceramics materials occurred, according to the difference of material composition, processable ceramics material can be divided into mica-based glass-ceramic, porous structure ceramic, phosphoric acid salt pottery and nano heterogeneous ceramic etc.In recent years, utilize second to strengthen flexible nano ceramics technology mutually and increased substantially the strength of materials, but toughness of material is not significantly increased, and will uses Fast Sintering equipment, be not easy to make the product of complicated shape yet.
The common feature of processable ceramics material is to introduce special microstructure in ceramic matrix, at the weak bonding surface of the inner generation of pottery, and deflection master crackle, the energy of dissipation crack propagation stops expansion, strengthens workability.A large amount of reports adopts diverse ways and preparation technology to improve the processability of alumina-ceramic, and these methods are generally according to following two kinds of schemes: (1) reorganization microtexture: the primary particle size that will account for leading role is controlled within people's desired extent and reduces defective; (2) control defective, material can bear or the defective of inherent of minimizing own or introducing.Like this, undoubtedly to still existing some to be difficult to the factor of accurately controlling in the experimentation, as: granulation process, sintering temperature, sintering velocity and the time, crystal boundary chemically reactive etc. has higher requirement, and certainly will cause the raising of material cost and preparation technology's complicacy, and practicality is relatively poor.
Summary of the invention
Purpose of the present invention is intended to overcome above-mentioned deficiency of the prior art, but a kind of processed alumina pottery and preparation method thereof is provided, thereby but provides a kind of and both had good processability and can prepare low processed alumina pottery of complex-shaped product and production cost and preparation method thereof.
Content of the present invention is: but a kind of processed alumina pottery is characterized in that mass percent example composition comprises: nano aluminium oxide 60%～68%, tabular alumina 30%～36%, magnesium oxide (MgO) 0.5%～1.5% and titanium dioxide (TiO
2) 1%～3%.
In the content of the present invention: described nano alumina powder jointed particle diameter is 80～100nm.
In the content of the present invention: the particle diameter of described tabular alumina is that 3～5 μ m, thickness are 0.2～0.4 μ m.
Another content of the present invention is: but a kind of preparation method of processed alumina pottery is characterized in that comprising the following steps:
A, preparation nano aluminium oxide:
Get the aluminum nitrate powder, be mixed and made into the aluminum nitrate aqueous solution that concentration is 0.5mol/L with water;
Get mass percent concentration and be 2.5%～2.8% ammoniacal liquor;
By aluminum nitrate aqueous solution: ammoniacal liquor: distilled water or deionized water are that 1: 4: 6 volume ratio is got distilled water or deionized water, in room temperature and under stirring, ammoniacal liquor and aluminum nitrate aqueous solution are splashed in distilled water or the deionized water simultaneously, and control mixed solution the pH value be 8～10, make colloidal sol;
Colloidal sol is incubated 20～24h in 80 ℃～85 ℃ water-baths, with deionized water and dehydrated alcohol (with behind the deionized water wash 3～6 times, use absolute ethanol washing 3～5 times again) washing, (vacuum range is that pressure range is 85 ℃～90 ℃ drying 18～24h of 0.06～0.09MPa) loft drier, obtains aluminum hydroxide solid elastomer to put into vacuum then;
With the temperature lower calcination 2～4h of aluminum hydroxide solid elastomer, obtain nano alumina powder in 900 ℃～1200 ℃.
B, preparation composite powder:
By aluminium hydroxide: sodium-chlor: Repone K is that 1: 1～1.5: 1～1.5 mass ratio is got aluminium hydroxide, sodium-chlor and Repone K; Transform the Mass Calculation that generates aluminum oxide (being tabular alumina) with the aluminium hydroxide reaction, press nano aluminium oxide 60%～68%, aluminum oxide 30%～36%, magnesium oxide (MgO) 0.5%～1.5% and titanium dioxide (TiO
2) 1%～3% mass percent example gets nano aluminium oxide, magnesium oxide and titanium dioxide; Behind aluminium hydroxide, sodium-chlor, Repone K, magnesium oxide and titanium dioxide mixed grinding 0.5～1h, add nano aluminium oxide again and become mixing raw material; Again by mixing raw material: dehydrated alcohol: abrading-ball is 1: 6: 3～5 mass ratio, with mixing raw material, dehydrated alcohol and abrading-ball mixed grinding 3～6h, makes mixing raw material;
Mixing raw material through ultra-sonic dispersion or stir back (when preventing ball milling produce because of material density is different layering), is placed drying 12～16h under 80 ℃～85 ℃ the temperature, sieve and remove zirconium oxide balls, make mixture;
Mixture is placed 900 ℃～1100 ℃ down calcining 2～4h, make and comprise tabular alumina, nano aluminium oxide, magnesium oxide (MgO), titanium dioxide (TiO
2) and impurity (K
+, Na
+, Cl
-) compound material; With deionized water compound material is washed 4～8 times, filtration, to leach redundant impurities ion (K
+, Na
+, Cl
-), the solids drying, what be uniformly mixed comprises nano aluminium oxide, tabular alumina (form fused salt by sodium-chlor and Repone K, control each crystal face speed of growth is different to be formed), magnesium oxide (MgO) and titanium dioxide (TiO
2) composite powder.
C, preparation pottery:
Get polyvinyl alcohol 1799 (its mean polymerisation degree 1799 ± 50, transmittance 〉=85%, purity 〉=90.5% of composite powder quality 3%～5%; Manufacturing enterprise has: sharpening worker company limited etc. is thought by the chemical industry company limited of the Long Huagongshijichang of Chengdu section, Guangzhou China, Shanghai, is the commercially available prod) binding agent, after mixing with composite powder and carrying out granulation, cross 200 mesh sieves, make pellet;
In forming pressure be under 120～150MPa, pressurize 80～120 seconds, with pellet through dry-pressing formed be base substrate;
Place High Temperature Furnaces Heating Apparatus to carry out sintering the base substrate after the moulding, sintering schedule is: from room temperature～to 600 ℃, heat-up rate be 1 ℃/min, insulation 0.5～1h, from 600 ℃～to 1000 ℃, heat-up rate be 10 ℃/min, from 1000 ℃～to 1580 ℃, heat-up rate be 2～4 ℃/min, insulation 4～8h; Base substrate promptly makes pottery behind sintering, the relative density of the pottery that makes reaches 95～97%, and bending strength is 520～550MPa, and fracture toughness property is 6.2～6.5MPa.m
1/2
In another content of the present invention: abrading-ball is preferably zirconium oxide balls described in the step b.
Compared with prior art, the present invention has following characteristics and beneficial effect:
(1) the present invention forms mechanism and is:
In the high-temperature calcination process, the rate of migration of material in fused salt reduced synthetic α-Al well below the solid state reaction of routine on the one hand
2O
3Temperature of reaction and dwindle the reaction times; Because fused salt to the wetness degree difference of each crystal face, makes the surface energy of each crystal face there are differences, cause each crystal face growth velocity difference on the other hand, finally form platelet;
(2) the present invention has introduced the sheet crystal alumina in nano aluminium oxide, the sheet crystal alumina is dispersed in the nano aluminium oxide, because in sintering process, not matching of internal contraction rate causes the strain imbalance, form a large amount of dislocations at the crystal boundary place, caused the existence of unrelieved stress.When surface crack passes at the interface, unrelieved stress can absorb strain energy, and crackle deflects along the interface, makes stress be released, and material opposing crack propagation ability is improved, and intensity and toughness improve.From the pore of ceramic surface of fracture, can observe: show as synusia shape structure after the slick smooth fracture, the smooth fracture pattern is a transgranular fracture, the intensity that crystal grain is described is low than grain-boundary strength, just because of this synusia shape structure, the crackle that makes material produce in the course of processing can deflect, expand along the synusia direction, has reduced the stress of crack tip, slows down crack propagation velocity, organize crackle further to expand, avoided the calamitous macroscopic view fracture of material;
(3) MgO and the TiO that adds in the pottery of the present invention
2, can solid solution in α-Al
2O
3In, improve Al
3+The ionic defect density is for TiO
2, Ti
4+Ionic adds, and has improved Al
3+The vacant concentration of ionic has been accelerated Al
3+The ionic lattice diffusion, and for MgO, Mg
2+Ion has occupied Al
3+The position, promoted Al
3+The gap ionic increases, and utilizes gap mechanism, has promoted Al
3+The ionic diffusion, thereby accelerated ceramic densification, reduced sintering temperature; Simultaneously, MgO can be at α-Al
2O
3Intergranule forms U.S. aluminate, prevents grain growth, forms fine crystalline structure; Lower sintering temperature and fine crystalline structure can improve the performance of material effectively;
(4) the ceramic bending strength of the present invention's preparation reaches 526MPa, fracture toughness property K
ICReach 6.4MPa.m
1/2Though along with the increase of tabular alumina content, the hardness of pottery descends significantly, the reduction of hardness can cause the processability of pottery to be significantly improved and improve; The free cutting property of pottery is mainly from the control action kou of the homodisperse tabular alumina of material internal to crack propagation, thereby the complex-shaped product of convenient preparation;
(5) hard brittle stupalith be difficult to mill, processing such as plane, mill, throwing, boring, expensive simultaneously machining expense and relatively poor working accuracy have also limited the application as engineering materials; The pottery of the present invention's preparation possesses good processability, and ceramic oxide itself just possesses premium propertiess such as good vacuum performance, electrical insulation characteristics and high temperature resistant, resistance to chemical attack, thereby is adapted at being extensive use of in the instruments such as automobile, military project, aerospace, precision instrument, medical facilities, electron tube, electron beam exposure machine, textile manufacturing machine, transmitter, mass spectrograph and energy spectrometer; For example: for the coil rack of some thin-walleds, the insulating support of precision instrument, the complex-shaped high device of accuracy requirement that waits, it can be processed into arbitrary shape;
(6) the present invention has good workability alumina-ceramic by preparing mixed uniformly composite powder, adopting dry-pressing formed and pressureless sintering is prepared from, material composition and preparation technology are simple, and production cost is low, are easy to make the complicated product of shape, operation is practical easily.
Description of drawings
Fig. 1 is the scanning electron microscope synoptic diagram of composite powder among content of the present invention and the embodiment;
Fig. 2 is the scanning electron microscope synoptic diagram of the surface of fracture of pottery of the present invention.
Embodiment
Embodiment given below intends so that the invention will be further described; but can not be interpreted as it is limiting the scope of the invention; the person skilled in art to some nonessential improvement and adjustment that the present invention makes, still belongs to protection scope of the present invention according to the content of the invention described above.
Embodiment 1:
Take by weighing a certain amount of aluminum nitrate powder, make the aluminum nitrate aqueous solution that concentration is 0.5mol/L; The strong aqua thin up is made into weak ammonia for 10 times, weak ammonia and aluminum nitrate solution are splashed in the distilled water simultaneously, the amount of distilled water is 9 to be as the criterion with the pH value of control solution, the colloidal sol of high-speed stirring acquisition at room temperature; The colloidal sol that obtains at 85 ℃ of water-bath 24h, is repeatedly washed with deionized water and ethanol, put into 90 ℃ of dryings of vacuum drying oven then, obtain aluminum hydroxide solid elastomer; Aluminum hydroxide solid elastomer is put into alumina crucible, and 1200 ℃ of calcining 2h obtain nano aluminium oxide (α-Al
2O
3) powder.Take by weighing α-Al
2O
3(particle diameter is the 50g of 80nm～100nm), analytical reagent aluminium hydroxide (purity 〉=99.5%) 23g, Repone K (purity 〉=99.5%) 34g, sodium-chlor (purity 〉=99.5%) 34g, MgO(purity 〉=98%) 3.25g, TiO
2(purity 〉=99.5%) 1.6g mixes, use zirconium oxide balls, with the dehydrated alcohol is medium ball milling 24h in the urethane ball grinder, after the drying powder mix is placed corundum crucible, calcined 2 hours down at 800 ℃, reaction product is removed foreign ion through repeatedly washing, and after the drying, the PVA(of adding 5% is a polyvinyl alcohol 1799 in powder mix) as binding agent, 200 mesh sieves are crossed in granulation, in punching block, suppress under the pressure of 120MPa, then with the aluminum oxide biscuit at 1550 ℃ of sintering, its sintering schedule is: room temperature～600 ℃, heat-up rate is 1 ℃/min, insulation 1h binder removal, 600 ℃～1000 ℃ is 10 ℃/min, 1000 ℃～1550 ℃ is 4 ℃/min, insulation 4h, obtain pottery of the present invention, its bending strength is 518MPa, fracture toughness property K
ICBe 6.4MPa.m
1/2
Embodiment 2:
But a kind of processed alumina pottery, the mass percent example is formed and is comprised: nano aluminium oxide 68%, tabular alumina 30%, magnesium oxide (MgO) 1% and titanium dioxide (TiO
2) 1%.
Embodiment 3-9:
But a kind of processed alumina pottery, its mass percent example composition sees the following form:
Among the embodiment 2-9, described nano alumina powder jointed particle diameter is 80～100nm;
Among the embodiment 2-9, the particle diameter of described tabular alumina is that 3～5 μ m, thickness are 0.2～0.4 μ m.
Embodiment 10:
But a kind of preparation method of processed alumina pottery comprises the following steps:
A, preparation nano aluminium oxide:
Get the aluminum nitrate powder, be mixed and made into the aluminum nitrate aqueous solution that concentration is 0.5mol/L with water;
Get mass percent concentration and be 2.5% ammoniacal liquor;
By aluminum nitrate aqueous solution: ammoniacal liquor: distilled water or deionized water are that 1: 4: 6 volume ratio is got distilled water or deionized water, in room temperature and under stirring, ammoniacal liquor and aluminum nitrate aqueous solution are splashed in distilled water or the deionized water simultaneously, and control mixed solution the pH value be 8～10, make colloidal sol;
Colloidal sol is incubated 20～24h in 80 ℃～85 ℃ water-baths, with deionized water and dehydrated alcohol (with behind the deionized water wash 3 times, use absolute ethanol washing 3 times again) washing, (vacuum range is that pressure range is 85 ℃～90 ℃ dry 18h of 0.06～0.09MPa) loft drier, obtains aluminum hydroxide solid elastomer to put into vacuum then;
With the temperature lower calcination 2h of aluminum hydroxide solid elastomer, obtain nano alumina powder in 900 ℃～1200 ℃.
B, preparation composite powder:
By aluminium hydroxide: sodium-chlor: Repone K is that 1: 1: 1 mass ratio is got aluminium hydroxide, sodium-chlor and Repone K; Transform the Mass Calculation that generates aluminum oxide (being tabular alumina) with the aluminium hydroxide reaction, press nano aluminium oxide 60%, aluminum oxide 36%, magnesium oxide (MgO) 1.5% and titanium dioxide (TiO
2) 2.5% mass percent example gets nano aluminium oxide, magnesium oxide and titanium dioxide; Behind aluminium hydroxide, sodium-chlor, Repone K, magnesium oxide and titanium dioxide mixed grinding 0.5h, add nano aluminium oxide again and become mixing raw material; Again by mixing raw material: dehydrated alcohol: abrading-ball is 1: 6: 3 a mass ratio, with mixing raw material, dehydrated alcohol and abrading-ball mixed grinding 3h, makes mixing raw material;
Mixing raw material through ultra-sonic dispersion or stir back (when preventing ball milling because of the different generation of material density layering), is placed dry 12h under 80 ℃～85 ℃ the temperature, sieve and remove zirconium oxide balls, make mixture;
Mixture is placed 900 ℃～1100 ℃ down calcining 2h, make and comprise tabular alumina, nano aluminium oxide, magnesium oxide (MgO), titanium dioxide (TiO
2) and impurity (K
+, Na
+, Cl
-) compound material; With deionized water compound material is washed 4 times, filtration, to leach redundant impurities ion (K
+, Na
+, Cl
-), the solids drying, what be uniformly mixed comprises nano aluminium oxide, tabular alumina (form fused salt by sodium-chlor and Repone K, control each crystal face speed of growth is different to be formed), magnesium oxide (MgO) and titanium dioxide (TiO
2) composite powder.
C, preparation pottery:
Get polyvinyl alcohol 1799 binding agents of composite powder quality 3%, after mixing with composite powder and carrying out granulation, cross 200 mesh sieves, make pellet;
In forming pressure be under 120～150MPa, pressurize 80 seconds, with pellet through dry-pressing formed be base substrate;
Place High Temperature Furnaces Heating Apparatus to carry out sintering the base substrate after the moulding, sintering schedule is: from room temperature～to 600 ℃, heat-up rate be 1 ℃/min, insulation 0.5h, from 600 ℃～to 1000 ℃, heat-up rate be 10 ℃/min, from 1000 ℃～to 1580 ℃, heat-up rate be 2～4 ℃/min, insulation 4h; Base substrate promptly makes pottery behind sintering, the relative density of the pottery that makes reaches 95～97%, and bending strength is 520～550MPa, and fracture toughness property is 6.2～6.5MPa.m
1/2
Embodiment 11:
But a kind of preparation method of processed alumina pottery comprises the following steps:
A, preparation nano aluminium oxide:
Get the aluminum nitrate powder, be mixed and made into the aluminum nitrate aqueous solution that concentration is 0.5mol/L with water;
Get mass percent concentration and be 2.8% ammoniacal liquor;
By aluminum nitrate aqueous solution: ammoniacal liquor: distilled water or deionized water are that 1: 4: 6 volume ratio is got distilled water or deionized water, in room temperature and under stirring, ammoniacal liquor and aluminum nitrate aqueous solution are splashed in distilled water or the deionized water simultaneously, and control mixed solution the pH value be 8～10, make colloidal sol;
Colloidal sol is incubated 24h in 80 ℃～85 ℃ water-baths, with deionized water and dehydrated alcohol (with behind the deionized water wash 6 times, use absolute ethanol washing 5 times again) washing, (vacuum range is that pressure range is 85 ℃～90 ℃ dry 24h of 0.06～0.09MPa) loft drier, obtains aluminum hydroxide solid elastomer to put into vacuum then;
With the temperature lower calcination 4h of aluminum hydroxide solid elastomer, obtain nano alumina powder in 900 ℃～1200 ℃.
B, preparation composite powder:
By aluminium hydroxide: sodium-chlor: Repone K is that 1: 1.5: 1.5 mass ratio is got aluminium hydroxide, sodium-chlor and Repone K; Transform the Mass Calculation that generates aluminum oxide (being tabular alumina) with the aluminium hydroxide reaction, press nano aluminium oxide 68%, aluminum oxide 30%, magnesium oxide (MgO) 0.5% and titanium dioxide (TiO
2) 1.5% mass percent example gets nano aluminium oxide, magnesium oxide and titanium dioxide; Behind aluminium hydroxide, sodium-chlor, Repone K, magnesium oxide and titanium dioxide mixed grinding 1h, add nano aluminium oxide again and become mixing raw material; Again by mixing raw material: dehydrated alcohol: abrading-ball is 1: 6: 5 a mass ratio, with mixing raw material, dehydrated alcohol and abrading-ball mixed grinding 6h, makes mixing raw material;
Mixing raw material through ultra-sonic dispersion or stir back (when preventing ball milling because of the different generation of material density layering), is placed dry 16h under 80 ℃～85 ℃ the temperature, sieve and remove zirconium oxide balls, make mixture;
Mixture is placed 900 ℃～1100 ℃ down calcining 4h, make and comprise tabular alumina, nano aluminium oxide, magnesium oxide (MgO), titanium dioxide (TiO
2) and impurity (K
+, Na
+, Cl
-) compound material; With deionized water compound material is washed 8 times, filtration, to leach redundant impurities ion (K
+, Na
+, Cl
-), the solids drying, what be uniformly mixed comprises nano aluminium oxide, tabular alumina (form fused salt by sodium-chlor and Repone K, control each crystal face speed of growth is different to be formed), magnesium oxide (MgO) and titanium dioxide (TiO
2) composite powder.
C, preparation pottery:
Get polyvinyl alcohol 1799 binding agents of composite powder quality 5%, after mixing with composite powder and carrying out granulation, cross 200 mesh sieves, make pellet;
In forming pressure be under 120～150MPa, pressurize 120 seconds, with pellet through dry-pressing formed be base substrate;
Place High Temperature Furnaces Heating Apparatus to carry out sintering the base substrate after the moulding, sintering schedule is: from room temperature～to 600 ℃, heat-up rate be 1 ℃/min, insulation 1h, from 600 ℃～to 1000 ℃, heat-up rate be 10 ℃/min, from 1000 ℃～to 1580 ℃, heat-up rate be 2～4 ℃/min, insulation 8h; Base substrate promptly makes pottery behind sintering, the relative density of the pottery that makes reaches 95～97%, and bending strength is 520～550MPa, and fracture toughness property is 6.2～6.5MPa.m
1/2
Embodiment 12:
But a kind of preparation method of processed alumina pottery comprises the following steps:
A, preparation nano aluminium oxide:
Get the aluminum nitrate powder, be mixed and made into the aluminum nitrate aqueous solution that concentration is 0.5mol/L with water;
Get mass percent concentration and be 2.6% ammoniacal liquor;
By aluminum nitrate aqueous solution: ammoniacal liquor: distilled water or deionized water are that 1: 4: 6 volume ratio is got distilled water or deionized water, in room temperature and under stirring, ammoniacal liquor and aluminum nitrate aqueous solution are splashed in distilled water or the deionized water simultaneously, and control mixed solution the pH value be 8～10, make colloidal sol;
Colloidal sol is incubated 22h in 80 ℃～85 ℃ water-baths, with deionized water and dehydrated alcohol (with behind the deionized water wash 4 times, use absolute ethanol washing 4 times again) washing, (vacuum range is that pressure range is 85 ℃～90 ℃ dry 21h of 0.06～0.09MPa) loft drier, obtains aluminum hydroxide solid elastomer to put into vacuum then;
With the temperature lower calcination 3h of aluminum hydroxide solid elastomer, obtain nano alumina powder in 900 ℃～1200 ℃.
B, preparation composite powder:
By aluminium hydroxide: sodium-chlor: Repone K is that 1: 1.2: 1.3 mass ratio is got aluminium hydroxide, sodium-chlor and Repone K; Transform the Mass Calculation that generates aluminum oxide (being tabular alumina) with the aluminium hydroxide reaction, press nano aluminium oxide 66%, aluminum oxide 32%, magnesium oxide (MgO) 1% and titanium dioxide (TiO
2) 1% mass percent example gets nano aluminium oxide, magnesium oxide and titanium dioxide; Behind aluminium hydroxide, sodium-chlor, Repone K, magnesium oxide and titanium dioxide mixed grinding 0.8h, add nano aluminium oxide again and become mixing raw material; Again by mixing raw material: dehydrated alcohol: abrading-ball is 1: 6: 4 a mass ratio, with mixing raw material, dehydrated alcohol and abrading-ball mixed grinding 4h, makes mixing raw material;
Mixing raw material through ultra-sonic dispersion or stir back (when preventing ball milling because of the different generation of material density layering), is placed dry 14h under 80 ℃～85 ℃ the temperature, sieve and remove zirconium oxide balls, make mixture;
Mixture is placed 900 ℃～1100 ℃ down calcining 3h, make and comprise tabular alumina, nano aluminium oxide, magnesium oxide (MgO), titanium dioxide (TiO
2) and impurity (K
+, Na
+, Cl
-) compound material; With deionized water compound material is washed 6 times, filtration, to leach redundant impurities ion (K
+, Na
+, Cl
-), the solids drying, what be uniformly mixed comprises nano aluminium oxide, tabular alumina (form fused salt by sodium-chlor and Repone K, control each crystal face speed of growth is different to be formed), magnesium oxide (MgO) and titanium dioxide (TiO
2) composite powder.
C, preparation pottery:
Get polyvinyl alcohol 1799 binding agents of composite powder quality 4%, after mixing with composite powder and carrying out granulation, cross 200 mesh sieves, make pellet;
In forming pressure be under 120～150MPa, pressurize 100 seconds, with pellet through dry-pressing formed be base substrate;
Place High Temperature Furnaces Heating Apparatus to carry out sintering the base substrate after the moulding, sintering schedule is: from room temperature～to 600 ℃, heat-up rate be 1 ℃/min, insulation 0.7h, from 600 ℃～to 1000 ℃, heat-up rate be 10 ℃/min, from 1000 ℃～to 1580 ℃, heat-up rate be 2～4 ℃/min, insulation 6h; Base substrate promptly makes pottery behind sintering, the relative density of the pottery that makes reaches 95～97%, and bending strength is 520～550MPa, and fracture toughness property is 6.2～6.5MPa.m
1/2
Embodiment 13-19:
But a kind of preparation method of processed alumina pottery comprises the following steps:
A, preparation nano aluminium oxide:
Get the aluminum nitrate powder, be mixed and made into the aluminum nitrate aqueous solution that concentration is 0.5mol/L with water;
Get mass percent concentration and be 2.5%～2.8% ammoniacal liquor;
By aluminum nitrate aqueous solution: ammoniacal liquor: distilled water or deionized water are that 1: 4: 6 volume ratio is got distilled water or deionized water, in room temperature and under stirring, ammoniacal liquor and aluminum nitrate aqueous solution are splashed in distilled water or the deionized water simultaneously, and control mixed solution the pH value be 8～10, make colloidal sol;
Colloidal sol is incubated 20～24h in 80 ℃～85 ℃ water-baths, with deionized water and dehydrated alcohol (with behind the deionized water wash 3～6 times, use absolute ethanol washing 3～5 times again) washing, (vacuum range is that pressure range is 85 ℃～90 ℃ drying 18～24h of 0.06～0.09MPa) loft drier, obtains aluminum hydroxide solid elastomer to put into vacuum then;
With the temperature lower calcination 2～4h of aluminum hydroxide solid elastomer, obtain nano alumina powder in 900 ℃～1200 ℃.
B, preparation composite powder:
By aluminium hydroxide: sodium-chlor: Repone K is that 1: 1～1.5: 1～1.5 mass ratio is got aluminium hydroxide, sodium-chlor and Repone K; Transform the Mass Calculation that generates aluminum oxide (being tabular alumina) with the aluminium hydroxide reaction, press nano aluminium oxide 60%～68%, aluminum oxide 30%～36%, magnesium oxide (MgO) 0.5%～1.5% and titanium dioxide (TiO
2) 1%～3% mass percent example gets nano aluminium oxide, magnesium oxide and titanium dioxide; Behind aluminium hydroxide, sodium-chlor, Repone K, magnesium oxide and titanium dioxide mixed grinding 0.5～1h, add nano aluminium oxide again and become mixing raw material; Again by mixing raw material: dehydrated alcohol: abrading-ball is 1: 6: 3～5 mass ratio, with mixing raw material, dehydrated alcohol and abrading-ball mixed grinding 3～6h, makes mixing raw material;
Among each embodiment, the concrete mass percent example of nano aluminium oxide, aluminum oxide, magnesium oxide and titanium dioxide sees the following form:
Mixing raw material through ultra-sonic dispersion or stir back (when preventing ball milling produce because of material density is different layering), is placed drying 12～16h under 80 ℃～85 ℃ the temperature, sieve and remove zirconium oxide balls, make mixture;
Mixture is placed 900 ℃～1100 ℃ down calcining 2～4h, make and comprise tabular alumina, nano aluminium oxide, magnesium oxide (MgO), titanium dioxide (TiO
2) and impurity (K
+, Na
+, Cl
-) compound material; With deionized water compound material is washed 4～8 times, filtration, to leach redundant impurities ion (K
+, Na
+, Cl
-), the solids drying, what be uniformly mixed comprises nano aluminium oxide, tabular alumina (form fused salt by sodium-chlor and Repone K, control each crystal face speed of growth is different to be formed), magnesium oxide (MgO) and titanium dioxide (TiO
2) composite powder.
C, preparation pottery:
Get polyvinyl alcohol 1799 binding agents of composite powder quality 3%～5%, after mixing with composite powder and carrying out granulation, cross 200 mesh sieves, make pellet;
In forming pressure be under 120～150MPa, pressurize 80～120 seconds, with pellet through dry-pressing formed be base substrate;
Place High Temperature Furnaces Heating Apparatus to carry out sintering the base substrate after the moulding, sintering schedule is: from room temperature～to 600 ℃, heat-up rate be 1 ℃/min, insulation 0.5～1h, from 600 ℃～to 1000 ℃, heat-up rate be 10 ℃/min, from 1000 ℃～to 1580 ℃, heat-up rate be 2～4 ℃/min, insulation 4～8h; Base substrate promptly makes pottery behind sintering, the relative density of the pottery that makes reaches 95～97%, and bending strength is 520～550MPa, and fracture toughness property is 6.2～6.5MPa.m
1/2
In the foregoing description 10-19: abrading-ball described in the step b is a zirconium oxide balls.
In the foregoing description 10-19: polyvinyl alcohol described in the step c 1799 is the commercially available prod, its mean polymerisation degree 1799 ± 50, transmittance 〉=85%, purity 〉=90.5%; Manufacturing enterprise has: sharpening worker company limited etc. is thought in the chemical industry company limited of the Long Huagongshijichang of Chengdu section, Guangzhou China, Shanghai.
In the foregoing description: in the percentage that is adopted, do not indicate especially, be weight (quality) percentage; Described weight part can all be gram or kilogram.
In the foregoing description: the processing parameter in each step and each amounts of components numerical value etc. are scope, and any point is all applicable.
The not concrete same prior art of narrating of technology contents in content of the present invention and the foregoing description.
The invention is not restricted to the foregoing description, content of the present invention is described all can implement and have described good result.
Claims (6)
1. but a processed alumina pottery is characterized in that mass percent example composition comprises: nano aluminium oxide 60%～68%, tabular alumina 30%～36%, magnesium oxide 0.5%～1.5% and titanium dioxide 1%～3%.
2. but by the described processed alumina pottery of claim 1, it is characterized in that: described nano alumina powder jointed particle diameter is 80～100nm.
3. described by claim 1 or 2, it is characterized in that: the particle diameter of described tabular alumina is that 3～5 μ m, thickness are 0.2～0.4 μ m.
4. but the preparation method of a processed alumina pottery is characterized in that comprising the following steps:
A, preparation nano aluminium oxide:
Get the aluminum nitrate powder, be mixed and made into the aluminum nitrate aqueous solution that concentration is 0.5mol/L with water;
Get mass percent concentration and be 2.5%～2.8% ammoniacal liquor;
By aluminum nitrate aqueous solution: ammoniacal liquor: distilled water or deionized water are that 1: 4: 6 volume ratio is got distilled water or deionized water, in room temperature and under stirring, ammoniacal liquor and aluminum nitrate aqueous solution are splashed in distilled water or the deionized water simultaneously, and control mixed solution the pH value be 8～10, make colloidal sol;
Colloidal sol is incubated 20～24h in 80 ℃～85 ℃ water-baths,, puts into vacuum drying oven dry 18～24h under 85 ℃～90 ℃ temperature then, obtain aluminum hydroxide solid elastomer with deionized water and absolute ethanol washing;
With the temperature lower calcination 2～4h of aluminum hydroxide solid elastomer, obtain nano alumina powder in 900 ℃～1200 ℃;
B, preparation composite powder:
By aluminium hydroxide: sodium-chlor: Repone K is that 1: 1～1.5: 1～1.5 mass ratio is got aluminium hydroxide, sodium-chlor and Repone K; Transform the Mass Calculation that generates aluminum oxide with the aluminium hydroxide reaction, get nano aluminium oxide, magnesium oxide and titanium dioxide by the mass percent example of nano aluminium oxide 60%～68%, aluminum oxide 30%～36%, magnesium oxide 0.5%～1.5% and titanium dioxide 1%～3%; Behind aluminium hydroxide, sodium-chlor, Repone K, magnesium oxide and titanium dioxide mixed grinding 0.5～1h, add nano aluminium oxide again and become mixing raw material; Again by mixing raw material: dehydrated alcohol: abrading-ball is 1: 6: 3～5 mass ratio, with mixing raw material, dehydrated alcohol and abrading-ball mixed grinding 3～6h, makes mixing raw material;
Mixing raw material through ultra-sonic dispersion or after stirring, is placed dry 12～16h under 80 ℃～85 ℃ the temperature, sieve and remove zirconium oxide balls, make mixture;
Mixture is placed 900 ℃～1100 ℃ calcining 2～4h down, make compound material; With compound material washing 4～8 times, filtration, the solids drying obtains composite powder with deionized water;
C, preparation pottery:
Get polyvinyl alcohol 1799 binding agents of composite powder quality 3%～5%, after mixing with composite powder and carrying out granulation, cross 200 mesh sieves, make pellet;
In forming pressure be under 120～150MPa, pressurize 80～120 seconds, with pellet through dry-pressing formed be base substrate;
Place High Temperature Furnaces Heating Apparatus to carry out sintering the base substrate after the moulding, sintering schedule is: from room temperature～to 600 ℃, heat-up rate be 1 ℃/min, insulation 0.5～1h, again from 600 ℃～to 1000 ℃, heat-up rate be 10 ℃/min, again from 1000 ℃～to 1580 ℃, heat-up rate be 2～4 ℃/min, insulation 4～8h; Base substrate promptly makes pottery behind sintering.
5. but by the preparation method of the described processed alumina pottery of claim 4, it is characterized in that: abrading-ball described in the step b is a zirconium oxide balls.
6. but by the preparation method of claim 4 or 5 described processed alumina potteries, it is characterized in that: the pressure in the vacuum drying oven described in the step a is 0.06～0.09MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110082535 CN102153335B (en) | 2011-04-02 | 2011-04-02 | Machinable aluminium oxide ceramics and preparation method of machinable aluminium oxide ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110082535 CN102153335B (en) | 2011-04-02 | 2011-04-02 | Machinable aluminium oxide ceramics and preparation method of machinable aluminium oxide ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102153335A true CN102153335A (en) | 2011-08-17 |
| CN102153335B CN102153335B (en) | 2013-01-16 |
Family
ID=44435065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110082535 Active CN102153335B (en) | 2011-04-02 | 2011-04-02 | Machinable aluminium oxide ceramics and preparation method of machinable aluminium oxide ceramics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102153335B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979940A (en) * | 2014-05-15 | 2014-08-13 | 张佑锋 | Super-toughness alumina ceramic and preparation method thereof |
| CN104441256A (en) * | 2014-10-16 | 2015-03-25 | 中国船舶重工集团公司第七0七研究所 | Efficient precision machining method and special tools for accelerometer coil framework |
| CN105036606A (en) * | 2015-07-04 | 2015-11-11 | 福建省德化福杰陶瓷有限公司 | Weatherable insulation and heat dissipation composite material, weatherable insulation and heat dissipation switch panel, making method of composite material, and making method of switch panel |
| CN105130406A (en) * | 2015-09-28 | 2015-12-09 | 长沙鼎成新材料科技有限公司 | Preparation method of high-voltage suspension type alumina-based ceramic binding post for electric power |
| CN105198407A (en) * | 2015-09-24 | 2015-12-30 | 长沙鼎成新材料科技有限公司 | Preparation method of composite ceramic binding post for electricity |
| CN105198388A (en) * | 2015-09-24 | 2015-12-30 | 长沙鼎成新材料科技有限公司 | Preparation method of ceramic binding post used for high voltage suspension type electric power |
| CN105254288A (en) * | 2015-09-28 | 2016-01-20 | 长沙鼎成新材料科技有限公司 | Preparation method of electric organic composite ceramic binding post |
| CN105254289A (en) * | 2015-09-24 | 2016-01-20 | 长沙鼎成新材料科技有限公司 | Preparation method of electricity inorganic composite ceramic binding post |
| CN107999957A (en) * | 2016-10-28 | 2018-05-08 | 中国航空工业集团公司北京航空制造工程研究所 | Avoid the protective materials of laser punching damage cavity part opposite walls and insert method |
| CN109896865A (en) * | 2017-12-08 | 2019-06-18 | 中国科学院上海硅酸盐研究所 | A method of improving aluminium oxide ceramics toughness |
| CN110062749A (en) * | 2016-12-08 | 2019-07-26 | 西门子股份公司 | Corrosion resistant ceramic material, powder, mud and component |
| CN110655399A (en) * | 2019-09-06 | 2020-01-07 | 钟祥市中原电子有限责任公司 | Breathable ceramic head for molten steel hydrogen determination probe and preparation method thereof |
| CN112250426A (en) * | 2020-10-21 | 2021-01-22 | 苏州晶瓷超硬材料有限公司 | High-purity alumina ceramic and preparation method thereof |
| CN112745112A (en) * | 2020-12-25 | 2021-05-04 | 东华大学 | Preparation method of high-strength and high-hardness fine-grain alpha-phase alumina ceramic |
| CN113714497A (en) * | 2021-08-04 | 2021-11-30 | 湖南工业大学 | Gradient powder metallurgy high-speed steel pretreatment powder and treatment method thereof and preparation method of gradient powder metallurgy high-speed steel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109852A (en) * | 1995-02-17 | 1995-10-11 | 刘乐群 | Coloured decorative ceramics and productive method thereof |
| CN1203207A (en) * | 1997-06-25 | 1998-12-30 | 西安市华秦工业窑炉公司 | High-strength fireproof pour material |
| CN1385396A (en) * | 2002-06-18 | 2002-12-18 | 宁波市北仑海伯精密机械制造有限公司 | Method for making aluminium oxide ceramic products |
-
2011
- 2011-04-02 CN CN 201110082535 patent/CN102153335B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109852A (en) * | 1995-02-17 | 1995-10-11 | 刘乐群 | Coloured decorative ceramics and productive method thereof |
| CN1203207A (en) * | 1997-06-25 | 1998-12-30 | 西安市华秦工业窑炉公司 | High-strength fireproof pour material |
| CN1385396A (en) * | 2002-06-18 | 2002-12-18 | 宁波市北仑海伯精密机械制造有限公司 | Method for making aluminium oxide ceramic products |
Non-Patent Citations (2)
| Title |
|---|
| 《无机材料学报》 20010930 王欣 等 TiO2和MgO微量添加剂对Al2O3陶瓷烧结致密化的影响 第979-984页 1-3 第16卷, 第5期 * |
| 《材料工程》 20071231 朱丽慧 等 片状氧化铝晶种加入量对氧化铝陶瓷组织和性能的影响 第44-47页 1-3 , 第12期 * |
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979940A (en) * | 2014-05-15 | 2014-08-13 | 张佑锋 | Super-toughness alumina ceramic and preparation method thereof |
| CN104441256A (en) * | 2014-10-16 | 2015-03-25 | 中国船舶重工集团公司第七0七研究所 | Efficient precision machining method and special tools for accelerometer coil framework |
| CN105036606A (en) * | 2015-07-04 | 2015-11-11 | 福建省德化福杰陶瓷有限公司 | Weatherable insulation and heat dissipation composite material, weatherable insulation and heat dissipation switch panel, making method of composite material, and making method of switch panel |
| CN108314419A (en) * | 2015-09-24 | 2018-07-24 | 于洋 | A kind of preparation method of composite ceramics binding post |
| CN105198407A (en) * | 2015-09-24 | 2015-12-30 | 长沙鼎成新材料科技有限公司 | Preparation method of composite ceramic binding post for electricity |
| CN105198388A (en) * | 2015-09-24 | 2015-12-30 | 长沙鼎成新材料科技有限公司 | Preparation method of ceramic binding post used for high voltage suspension type electric power |
| CN108285322A (en) * | 2015-09-24 | 2018-07-17 | 于洋 | A kind of preparation method of electric power composite ceramics binding post |
| CN105254289A (en) * | 2015-09-24 | 2016-01-20 | 长沙鼎成新材料科技有限公司 | Preparation method of electricity inorganic composite ceramic binding post |
| CN108314429A (en) * | 2015-09-24 | 2018-07-24 | 于洋 | A kind of preparation method of higfh-tension ceramics binding post |
| CN105198388B (en) * | 2015-09-24 | 2018-04-24 | 颜荣土 | A kind of preparation method of high voltage suspended electric power ceramic wiring terminal |
| CN108298962A (en) * | 2015-09-24 | 2018-07-20 | 于洋 | A kind of preparation method of high voltage suspended ceramic wiring terminal |
| CN105198407B (en) * | 2015-09-24 | 2018-04-24 | 刘淑敏 | A kind of preparation method of electric power composite ceramics binding post |
| CN105254289B (en) * | 2015-09-24 | 2018-07-27 | 湖南鸿迪机电科技有限公司 | A kind of preparation method of electric power inorganic compound ceramic binding post |
| CN108285336A (en) * | 2015-09-28 | 2018-07-17 | 赵万云 | A kind of preparation method of high voltage suspended alumina-based ceramic binding post |
| CN108285335A (en) * | 2015-09-28 | 2018-07-17 | 赵万云 | A kind of preparation method of electric power organic composite ceramic wiring terminal |
| CN105254288B (en) * | 2015-09-28 | 2018-04-24 | 刘淑敏 | A kind of preparation method of electric power organic composite ceramic wiring terminal |
| CN105130406B (en) * | 2015-09-28 | 2018-04-24 | 颜荣雄 | A kind of preparation method of high voltage suspended electric power alumina-based ceramic binding post |
| CN105254288A (en) * | 2015-09-28 | 2016-01-20 | 长沙鼎成新材料科技有限公司 | Preparation method of electric organic composite ceramic binding post |
| CN108314434A (en) * | 2015-09-28 | 2018-07-24 | 赵万云 | A kind of preparation method of high-pressure oxidation Al-base ceramic binding post |
| CN105130406A (en) * | 2015-09-28 | 2015-12-09 | 长沙鼎成新材料科技有限公司 | Preparation method of high-voltage suspension type alumina-based ceramic binding post for electric power |
| CN108358616A (en) * | 2015-09-28 | 2018-08-03 | 赵万云 | A kind of preparation method of organic composite ceramic wiring terminal |
| CN107999957A (en) * | 2016-10-28 | 2018-05-08 | 中国航空工业集团公司北京航空制造工程研究所 | Avoid the protective materials of laser punching damage cavity part opposite walls and insert method |
| US11834377B2 (en) | 2016-12-08 | 2023-12-05 | Siemens Energy Global GmbH & Co. KG | Erosion-resistant ceramic material, powder, slip and component |
| CN110062749A (en) * | 2016-12-08 | 2019-07-26 | 西门子股份公司 | Corrosion resistant ceramic material, powder, mud and component |
| CN109896865A (en) * | 2017-12-08 | 2019-06-18 | 中国科学院上海硅酸盐研究所 | A method of improving aluminium oxide ceramics toughness |
| CN109896865B (en) * | 2017-12-08 | 2021-05-25 | 中国科学院上海硅酸盐研究所 | Method for improving toughness of aluminum oxide ceramic |
| CN110655399A (en) * | 2019-09-06 | 2020-01-07 | 钟祥市中原电子有限责任公司 | Breathable ceramic head for molten steel hydrogen determination probe and preparation method thereof |
| CN112250426A (en) * | 2020-10-21 | 2021-01-22 | 苏州晶瓷超硬材料有限公司 | High-purity alumina ceramic and preparation method thereof |
| CN112745112A (en) * | 2020-12-25 | 2021-05-04 | 东华大学 | Preparation method of high-strength and high-hardness fine-grain alpha-phase alumina ceramic |
| CN113714497A (en) * | 2021-08-04 | 2021-11-30 | 湖南工业大学 | Gradient powder metallurgy high-speed steel pretreatment powder and treatment method thereof and preparation method of gradient powder metallurgy high-speed steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102153335B (en) | 2013-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102153335B (en) | Machinable aluminium oxide ceramics and preparation method of machinable aluminium oxide ceramics | |
| CN106995308B (en) | Ceramic riving knife material and preparation method thereof | |
| JP2857626B2 (en) | High fracture toughness self-strengthened silicon nitride ceramic and method for producing the same | |
| AU640150B2 (en) | Sintered material based on aluminium oxide, a process for its production and its use | |
| JPS6140621B2 (en) | ||
| WO2009154219A1 (en) | Method for producing aluminum titanate-based ceramic | |
| CN113563103B (en) | Method for preparing gradient alumina porous ceramic by adopting tape casting forming method | |
| CN108821750B (en) | Sintered magnesia with micro-nano composite pore structure and preparation method thereof | |
| JPWO2016171155A1 (en) | Sintered body and cutting tool including the same | |
| CN106167413A (en) | A kind of toughness reinforcing 90 aluminium oxide ceramics of On In-situ Synthesis of Mullite Whisker and preparation method | |
| CN113845361A (en) | High-performance alkaline special ceramic and preparation method thereof | |
| JP6278476B2 (en) | Ceramic composition comprising alumina | |
| Badiee et al. | The effect of nano-TiO2 addition on the properties of mullite-zirconia composites prepared by slip casting | |
| CN106698489B (en) | A kind of preparation method of high cutting high brightness aluminum oxide polishing powder | |
| CN111958762A (en) | Method for manufacturing ceramic body by using ceramic waste | |
| El-Fadaly et al. | Recycling of ceramic industry wastes in floor tiles recipes | |
| CN108046783B (en) | Cordierite-corundum hollow sphere sagger, preparation method and application thereof | |
| CN112209624A (en) | Foamed ceramic with high thermal stability and fire resistance and preparation method thereof | |
| CN114644525A (en) | Composite sagger added with waste materials and preparation method thereof | |
| KR20170077972A (en) | Composite for ceramic ware body with high strength and manufacturing method of ceramic ware with high strength using the composite | |
| CN110616345B (en) | Fine-grain hard alloy and preparation method thereof | |
| JP6502495B2 (en) | Ceramic powder with controlled size distribution | |
| CN113754414B (en) | High-density high-strength medium-aluminum/medium-high-aluminum alumina ball-milling medium and preparation method thereof | |
| Rahmani et al. | RELATION BETWEEN PARTICLE SIZE OF RAW MATERIALS AND PROPERTIES OF MULLITE-ZrO 2 COMPOSITES PREPARED BY REACTION-SINTERING | |
| Li | Research on the Preparation of Toughened Mullite Ceramic Support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |