CN118026648A - High-strength low-loss alumina ceramic and preparation method and application thereof - Google Patents
High-strength low-loss alumina ceramic and preparation method and application thereof Download PDFInfo
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 238000002360 preparation method Methods 0.000 title abstract description 20
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims abstract description 84
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 74
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 68
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 68
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 52
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 42
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 36
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 35
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 34
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 34
- 238000005245 sintering Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000000919 ceramic Substances 0.000 claims description 102
- 239000002002 slurry Substances 0.000 claims description 60
- 229910052573 porcelain Inorganic materials 0.000 claims description 49
- 238000000462 isostatic pressing Methods 0.000 claims description 30
- 238000000498 ball milling Methods 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 15
- 239000011148 porous material Substances 0.000 claims description 5
- 238000003801 milling Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- 238000004806 packaging method and process Methods 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000006104 solid solution Substances 0.000 abstract description 3
- 229910052596 spinel Inorganic materials 0.000 abstract description 3
- 239000011029 spinel Substances 0.000 abstract description 3
- 239000011777 magnesium Substances 0.000 abstract 2
- 239000011572 manganese Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 6
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 4
- 229910001425 magnesium ion Inorganic materials 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910052574 oxide ceramic Inorganic materials 0.000 description 3
- 239000011224 oxide ceramic Substances 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000004040 coloring Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001437 manganese ion Inorganic materials 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a high-strength low-loss alumina ceramic, a preparation method and application thereof, and relates to the technical field of ceramic materials, wherein the raw materials of the formula comprise 0.5-2% of manganese oxide, 1-3% of titanium dioxide, 1-3% of silicon dioxide, 0.5-2% of magnesium oxide, 0.5-1% of calcium carbonate and the balance of alumina powder. On one hand, the continuous solid solution can be formed by adding manganese oxide and magnesium oxide in the presence of spinel, and the black alumina ceramic has high heat resistance and chemical stability and can keep the dielectric property of the black alumina ceramic unchanged obviously; on the other hand, the added manganese oxide can effectively inhibit abnormal growth of alumina grains, and the co-doping of Mg 2+ can promote the mixing of Mn 2+ and Mg 4+ in the sintering process through mutual compensation between charges, so that the uniformity of an insulating medium is improved, the secondary electron emission coefficient of the insulating medium is reduced, and the insulating property of the ceramic material is better.
Description
Technical Field
The invention relates to the technical field of ceramic materials, in particular to high-strength low-loss alumina ceramic, and a preparation method and application thereof.
Background
The alumina ceramic is superior to most of oxide ceramic in mechanical, thermal, electric and other physical properties, and has the advantages of abundant raw material sources, low cost and good chemical stability, thus being the most commonly used material in the electronic industry integrated circuits at present. The alumina ceramic can be divided into 75 porcelain, 85 porcelain, 95 porcelain, 99 porcelain and other different types according to the purity of the alumina, and the alumina ceramic is generally characterized by low dielectric constant, low loss, higher mechanical strength, good insulating property, good chemical stability, different content of alumina, almost unaffected insulating property, but larger change of physical properties such as strength, thermal conductivity, surface roughness, density and the like, and when the purity of the alumina ceramic is lower, more second phases (glass phases) exist in a substrate, a multiphase grain boundary structure exists on the surface of the ceramic substrate, a large number of tiny peaks and valleys exist on the surface of the ceramic substrate, so that the surface roughness is large, the substrate with higher purity is smaller, the multiphase grain boundary structure is smaller, the surface is smoother and denser, the dielectric loss is lower, the strength is higher, and the price is higher.
The current alumina ceramic is generally prepared by adding a certain amount of binder and plasticizer into alumina powder, uniformly mixing at 150-200 ℃ and then shaping by adopting the methods of dry pressing, grouting, hot pressing or hot isostatic pressing.
However, the alumina ceramic prepared by the existing alumina ceramic preparation process has the problems of low bending strength, high-frequency loss and the like, so that the prepared alumina ceramic has defects in application in electronic ceramic parts.
Disclosure of Invention
Based on the problems existing in the background technology, the invention aims to provide the high-strength low-loss alumina ceramic, the preparation method and the application thereof, wherein the alumina ceramic has high bending strength which can reach 400 Mpa-500 Mpa, low high-frequency loss, loss which is lower than 0.003 when tested at 1.9GHz, one order of magnitude lower than that of the conventional black alumina ceramic, and wide pre-adhesion and sintering temperature range, and the alumina ceramic prepared by the preparation method has very firm property and high reliability and can be used for products with the requirement of microwave transmission performance.
The invention is realized by the following technical scheme:
In a first aspect, the application provides a high strength low loss alumina ceramic, comprising, by weight, 0.5% to 2% manganese oxide, 1% to 3% titanium dioxide, 1% to 3% silicon dioxide, 0.5% to 2% magnesium oxide, 0.5% to 1% calcium carbonate, and the balance alumina powder.
Further, the composite material comprises, by weight, 1% of manganese oxide, 2% of titanium dioxide, 2% of silicon dioxide, 1% of magnesium oxide, 0.7% of calcium carbonate and 93.3% of alumina powder.
According to the formula of the alumina ceramic, the manganese oxide and the magnesium oxide are added, so that on one hand, the manganese oxide is used as a coloring oxide, the alumina ceramic is black, and meanwhile, the spinel is used, so that a continuous solid solution can be formed, the alumina ceramic has high heat resistance, chemical stability and a large sintering temperature range, and the dielectric property of the black alumina ceramic can be kept from being obviously changed; on the other hand, the added manganese oxide and magnesium oxide have synergistic effect, so that abnormal growth of aluminum oxide grains can be effectively inhibited, the co-doping of divalent magnesium ions can promote the mixing of manganese ions and tetravalent magnesium ions in the sintering process through mutual charge compensation, the uniformity of ceramics is facilitated, the uniformity of an insulating medium is improved, the secondary electron emission coefficient of the insulating medium is reduced, the flashover voltage of the insulating medium can be effectively improved, the insulating property of the ceramic material is better, and meanwhile, the bending strength is also very high.
Furthermore, the magnesium oxide is porous magnesium oxide fine powder, and the surface of the magnesium oxide is provided with open pores to form a zigzag structure.
According to the invention, the magnesia is further limited to be porous magnesia, and the surface open pores form a zigzag structure, so that on one hand, the contact area between the magnesia and other materials can be increased, the sintering of the interface is quickened, and good neck connection is formed; on the other hand, the alumina ceramic can also form a regular spherical crystal structure with silicon dioxide, and both effects further improve the strength of the prepared alumina ceramic.
In a second aspect, the application provides a method for preparing high-strength low-loss alumina ceramic, comprising the steps of:
Step one: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing to obtain ceramic slurry;
Step two: preparing ceramic slurry into a raw ceramic tape;
step three: after the raw porcelain belt is manufactured into a raw porcelain piece, isostatic pressing treatment is carried out, so that the raw porcelain piece is tightly combined;
Step four: sintering the ceramic green piece after isostatic pressing treatment to obtain the high-strength alumina ceramic piece.
Further, the raw material mixing mode in the first step comprises ball milling, tank milling or sand milling.
Further, the ceramic slurry in the first step has a particle size D50 and a length of 2 μm to 3. Mu.m.
Further, the isostatic pressure used in step three is 2000psi.
Further, the sintering temperature in the fourth step is 1450-1550 ℃.
Further, the sintering temperature in the fourth step was 1500 ℃.
In a third aspect, the present application provides a high strength low loss alumina ceramic as described above or a high strength alumina ceramic prepared by the method of preparing a high strength low loss alumina ceramic as described above for use in preparing a ceramic package housing, an electronic ceramic component, or a consumer ceramic.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) According to the formula of the alumina ceramic, the manganese oxide and the magnesium oxide are added, so that on one hand, the manganese oxide is used as a coloring oxide, the alumina ceramic is black, and meanwhile, the spinel is used, so that a continuous solid solution can be formed, the alumina ceramic has high heat resistance, chemical stability and a large sintering temperature range, and the dielectric property of the black alumina ceramic can be kept from being obviously changed; on the other hand, the added manganese oxide and magnesium oxide have synergistic effect, so that abnormal growth of alumina grains can be effectively inhibited, the co-doping of divalent magnesium ions can promote the mixing of manganese ions and tetravalent magnesium ions in the sintering process through mutual charge compensation, the uniformity of ceramics is facilitated, the uniformity of an insulating medium is improved, the secondary electron emission coefficient of the insulating medium is reduced, the flashover voltage of the insulating medium can be effectively improved, the insulating property of the ceramic material is better, and meanwhile, the bending strength is also very high;
(2) According to the invention, the magnesia is further limited to be porous magnesia, and the surface open pores form a zigzag structure, so that on one hand, the contact area between the magnesia and other materials can be increased, the sintering of the interface is quickened, and good neck connection is formed; on the other hand, the alumina ceramic can also form a regular spherical crystal structure with silicon dioxide, and both effects further improve the strength of the prepared alumina ceramic.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a surface and cross-sectional SEM image of a high strength, low loss alumina ceramic member of example 1 of the invention;
FIG. 2 is a graph showing the test of flexural strength of the high strength low loss alumina ceramic of example 1 of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 1% of titanium dioxide, 1% of silicon dioxide, 0.5% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Performance detection
1. The surface and the section of the high-strength alumina ceramic part prepared by the method of example 1 were subjected to microscopic detection by using an electronic scanning mirror, and the detection results are shown in fig. 1.
As can be seen from fig. 1, the high strength alumina ceramic part prepared by the method of example 1 has been fully sintered to be dense, resulting in reduced dielectric loss of the ceramic. The loss was measured at 1.9GHz and was less than 0.003.
2. The high-strength alumina ceramic piece prepared by the method of example 1 is subjected to bending strength detection, 10 samples are taken for detection, the detection result curve is shown in fig. 2, and the detection data are shown in the following table.
From the detection data and the graph, the high-strength alumina ceramic prepared by the method has high bending strength.
Example 2
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 1% of titanium dioxide, 1% of silicon dioxide, 0.5% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. Unlike example 1, the magnesium oxide in this example was a porous magnesium oxide fine powder, and the surface thereof had open pores forming a zigzag structure.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 3
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the alumina ceramic comprises, by weight, 1% of manganese oxide, 2% of titanium dioxide, 2% of silicon dioxide, 2% of magnesium oxide, 1% of calcium carbonate and the balance of alumina powder.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 4
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the alumina ceramic comprises 2% of manganese oxide, 3% of titanium dioxide, 3% of silicon dioxide, 2% of magnesium oxide, 1% of calcium carbonate and the balance of alumina powder in percentage by weight.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 5
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 1% of manganese oxide, 1% of titanium dioxide, 1% of silicon dioxide, 0.5% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. In this example, the amount of manganese oxide was 1% and the amount of alumina powder was 96% compared with example 1, and other technical features were exactly the same as in example 1.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 6
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 2% of titanium dioxide, 1% of silicon dioxide, 0.5% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. In this example, the amount of titanium dioxide was 2% and the amount of alumina powder was 95.5% as compared with example 1, and other technical features were exactly the same as in example 1.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 7
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 1% of titanium dioxide, 2% of silicon dioxide, 0.5% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. In this example, the amount of silica was 2% and the amount of alumina powder was 95.5% as compared with example 1, and other technical features were exactly the same as in example 1.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 8
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 1% of titanium dioxide, 1% of silicon dioxide, 1% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. In this example, the amount of magnesium oxide was 1% and the amount of alumina powder was 96% compared with example 1, and other technical features were exactly the same as in example 1.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 9
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 1% of titanium dioxide, 1% of silicon dioxide, 1% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. In this example, the amount of calcium carbonate was 1% and the amount of alumina powder was 96% compared with example 1, and other technical features were exactly the same as in example 1.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 10
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 1% of titanium dioxide, 1% of silicon dioxide, 0.5% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. Unlike example 1, the ceramic slurry in this example had a length of 2.5 μm, and other technical features were exactly the same as those in example 1.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2.5 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 11
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 1% of titanium dioxide, 1% of silicon dioxide, 0.5% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. Unlike example 1, the ceramic slurry in this example had a length of 3 μm, and other technical features were exactly the same as those in example 1.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 3 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece after isostatic pressing treatment at 1450 ℃ to obtain the high-strength alumina ceramic piece.
Example 12
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 1% of titanium dioxide, 1% of silicon dioxide, 0.5% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. Unlike example 1, the sintering temperature in this example was 1500 ℃, and other technical features were exactly the same as example 1.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2.5 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: sintering the ceramic green piece subjected to isostatic pressing at 1500 ℃ to obtain the high-strength aluminum oxide ceramic piece.
Example 13
The embodiment provides a high-strength low-loss alumina ceramic and a preparation method thereof, wherein the high-strength low-loss alumina ceramic comprises, by weight, 0.5% of manganese oxide, 1% of titanium dioxide, 1% of silicon dioxide, 0.5% of magnesium oxide, 0.5% of calcium carbonate and the balance of alumina powder. Unlike example 1, the sintering temperature in this example was 1550 ℃, and other technical features were exactly the same as in example 1.
The method for preparing the high-strength alumina ceramic by adopting the formula comprises the following steps:
S1: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing by adopting a ball milling mode to obtain ceramic slurry, wherein the granularity of the ceramic slurry is controlled to be D50, and the length of the ceramic slurry is controlled to be 2.5 mu m;
s2: preparing ceramic slurry into a raw ceramic tape;
s3: after the green porcelain belt is manufactured into a green porcelain piece, isostatic pressing treatment is carried out under the pressure intensity of 2000psi, so that the green porcelain piece is tightly combined;
S4: and sintering the green ceramic piece subjected to isostatic pressing at 1550 ℃ to obtain the high-strength aluminum oxide ceramic piece.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The high-strength low-loss alumina ceramic is characterized by comprising, by weight, 0.5% -2% of manganese oxide, 1% -3% of titanium dioxide, 1% -3% of silicon dioxide, 0.5% -2% of magnesium oxide, 0.5% -1% of calcium carbonate and the balance of alumina powder.
2. The high strength low loss alumina ceramic of claim 1 comprising, by weight, 1% manganese oxide, 2% titanium dioxide, 2% silicon dioxide, 1% magnesium oxide, 0.7% calcium carbonate, 93.3% alumina powder.
3. The high strength low loss alumina ceramic according to claim 1, wherein the magnesia is a porous magnesia fine powder, and the surface open pores form a zigzag structure.
4. A method for preparing the high-strength low-loss alumina ceramic according to any one of claims 1 to 3, comprising the steps of:
Step one: weighing manganese oxide, titanium dioxide, silicon dioxide, magnesium oxide, calcium carbonate and alumina powder according to the dosage ratio, and uniformly mixing to obtain ceramic slurry;
Step two: preparing ceramic slurry into a raw ceramic tape;
step three: after the raw porcelain belt is manufactured into a raw porcelain piece, isostatic pressing treatment is carried out, so that the raw porcelain piece is tightly combined;
Step four: sintering the ceramic green piece after isostatic pressing treatment to obtain the high-strength alumina ceramic piece.
5. The method of producing a high strength low loss alumina ceramic according to claim 4, wherein the raw material mixing means in the first step comprises ball milling, tank milling or sand milling.
6. The method for producing a high strength low loss alumina ceramic according to claim 4, wherein the ceramic slurry in the first step has a particle size D50 and a length of 2 μm to 3. Mu.m.
7. The method of producing a high strength, low loss alumina ceramic according to claim 4, wherein the isostatic pressure treatment in step three uses a pressure of 2000psi.
8. The method for producing a high strength low loss alumina ceramic according to claim 4, wherein the sintering temperature in the fourth step is 1450 ℃ to 1550 ℃.
9. The method for producing a high strength low loss alumina ceramic according to claim 8, wherein the sintering temperature in the fourth step is 1500 ℃.
10. A high strength low loss alumina ceramic according to any one of claims 1 to 3 or a high strength alumina ceramic prepared by the method for preparing a high strength low loss alumina ceramic according to any one of claims 4 to 9 for use in preparing ceramic packaging casings, electronic ceramic parts or consumer ceramics.
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