CN101948300B - Corundum-spinel lightweight heat-insulating material and preparation method thereof - Google Patents
Corundum-spinel lightweight heat-insulating material and preparation method thereof Download PDFInfo
- Publication number
- CN101948300B CN101948300B CN 201010265125 CN201010265125A CN101948300B CN 101948300 B CN101948300 B CN 101948300B CN 201010265125 CN201010265125 CN 201010265125 CN 201010265125 A CN201010265125 A CN 201010265125A CN 101948300 B CN101948300 B CN 101948300B
- Authority
- CN
- China
- Prior art keywords
- spinel
- corundum
- insulating material
- lightweight heat
- preparation
- 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.)
- Expired - Fee Related
Links
Abstract
The invention specifically relates to a corundum-spinel lightweight heat-insulating material and a preparation method thereof. The adopted technical scheme is as follows: taking 40-60wt% of alpha-Al2O3 fine powder, 25-40wt% of alpha-Al2O3 micropowder, 2-10wt% of rho-Al2O3 micropowder and 5-20wt% of fused magnesia as raw materials, adding 20-35wt% of water and 0.1-1wt% of water reducing agent based on the weight of the raw materials, mixing for 3-5 minutes, adding 0.2-0.4wt% of foaming agent based on the weight of the raw materials, mixing evenly, casting for molding, drying, sintering at the temperature of 1450-1700 DEG C, and performing heat preservation for 3-5 hours, wherein, the particle size of the alpha-Al2O3 fine powder is 200 mesh sieve, the particle size of the fused magnesia is 200 mesh sieve, and the water reducing agent is one of a polycarboxylic acid water reducing agent, an inorganic salt water reducing agent, a lignin water reducing agent and a naphthalene water reducing agent. The invention has the characteristics of simple process and energy conservation, and the obtained corundum-spinel lightweight heat-insulating material has the advantages of high strength, low thermal conductivity coefficient and micro-expansion.
Description
Technical field
The invention belongs to the light heat-insulating material technical field, be specifically related to a kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.
Background technology
Save energy is one of economic important measures that keep Sustainable development, and the insulation thermal insulation then is one of energy-conservation important measures, thereby the heat-insulating heat-preserving material with micro-nano hole has consequence in the heat-insulation and heat-preservation field.Lagging material refers to the material that void content is high, volume density is low, thermal conductivity is low.For at various atmosphere (air, H
2, N
2And CO etc.) under, satisfy the high-temperature heat treatment process requirement of metal, nonmetal and goods, and reduce energy consumption, many scientific and technical personnel are devoted to research at the lower light heat-insulating material that uses of high temperature (1750-1800 ℃).High-strength, ultralight, low heat conduction also is the developing direction of domestic and international light heat-insulating material always.
At present, magnesium-aluminium spinel widespread use in the equipment such as ladle.Because its high heat conductance makes liquid steel temperature reduction in the ladle, the ladle liner drop in temperature causes the inner lining surface steel bonding, dry slag; The ladle skin temperature raises, and causes the ladle casing deformation, and this is so that the steel-making difficult.Although some other light heat-insulating material thermal conductivity is low, refractory temperature is not high enough, and has the problem of burning rear linear shrinkage and in use shrinking, and will cause ladle liner the slit to occur, makes the ladle heat radiation too fast, and has bleed-out, oozes the risk of steel.
Heat-insulating problem about ladle has also had some researchs, as use low-density magnesium-aluminium spinel aggregate, prepared a kind of low-density Refractory Carstables for Ladles (R.Chen, P.He, N.Wang, J.Mou and F.Gan. " development ofa Low Density Castable for Steel Ladle, " UNITECR ' 03Proceedings, 2003); " a kind of preparation method of lightweight magnesium-aluminum spinel raw material " be patented technology (CN200810049037.8), has proposed a kind of preparation method of lightweight magnesium-aluminum spinel, adopts γ-Al
2O
3Fine powder and magnesite fine powder are main raw material, and semi-dry pressing 1650～1800 ℃ of calcinings, is incubated 2～4 hours with the base substrate after the baking, and the lightweight magnesium-aluminum spinel raw material that makes can be used for preparing magnesium-aluminium spinel matter insulating refractory goods; Also have take aluminum oxide and magnesium oxide as main raw material (Sun Lifeng. magnesium-aluminium spinel lightweight refractory synthetic. the large native academic dissertation of Northeastern University, 2005), adding a certain amount of pore former, plastic making has prepared the magnesium-aluminium spinel lightweight refractory.Although front two kinds of methods have been alleviated this problem, but all need just to make light heat-insulating material through two steps, complex process not only, and consumption mass energy, the light heat-insulating material thermal conductivity that makes is high, linear shrinkage and the problem of in use shrinking after exist burning, thereby power in result of use and not to be clearly.And the third method also has weak point, and its product green strength in preparation process is low, and finished product is yielding.
Summary of the invention
The present invention is intended to overcome the prior art defective, and purpose provides a kind of manufacture craft simply and the preparation method of the corundum-spinel lightweight heat-insulating material of save energy.With the prepared corundum-spinel lightweight heat-insulating material of the method have the intensity height, thermal conductivity is low and the characteristics of microdilatancy.
For achieving the above object, the technical solution adopted in the present invention is: with α-Al of 40～60wt%
2O
3α-Al of fine powder, 25～40wt%
2O
3ρ-Al of micro mist, 2～10wt%
2O
3The electrosmelted magnesite clinker of micro mist and 5～20wt% is raw material, add the water of above-mentioned raw materials 20～35wt% and the water reducer of 0.1～1wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.2～0.4wt%, mix, casting burns till under 1450～1700 ℃ condition after the drying, is incubated 3～5 hours.
In the technique scheme: α-Al
2O
3The granularity of fine powder is 200 orders; The granularity of electrosmelted magnesite clinker is 200 orders; Water reducer is a kind of in polycarboxylic acids dehydragent, inorganic salts water reducer, Lignins water reducer, the naphthalene water reducer.
Because adopt technique scheme, the present invention can make corundum-spinel lightweight heat-insulating material by single stage method, operating procedure is simple, and save energy is low in the pollution of the environment; Because the foaming agent that mixes in this material can form the aperture that seals in a large number and be evenly distributed in material, gas molecule is difficult to mutually collision, and the result will make material thermal conductivity greatly lower; The a large amount of pores that form also make material have lower volume density, in addition, be raw material owing to adopt aluminum oxide and electrosmelted magnesite clinker, the two can reaction produce spinel in sintering process, and follow the necessarily volumetric expansion of (5～8%), thereby cause the volume density of material to reduce.
The volume density of the corundum-spinel lightweight heat-insulating material that the present invention is prepared is 0.8～2.2g/cm
3, thermal conductivity is 0.2～1.0w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.5%～1.5%, and compressive strength reaches 3～60Mpa.
Therefore, the present invention has technique simply and the characteristics of save energy, and prepared corundum-spinel lightweight heat-insulating material has the intensity height, thermal conductivity is low and the advantage of microdilatancy.
Embodiment
The invention will be further described below in conjunction with embodiment, is not the restriction to its protection domain:
In this embodiment: α-Al
2O
3The granularity of fine powder and electrosmelted magnesite clinker is 200, will not give unnecessary details in following examples:
Embodiment 1:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 40～45wt%
2O
3α-Al of fine powder, 35～40wt%
2O
3ρ-Al of micro mist, 2～5wt%
2O
3The electrosmelted magnesite clinker of micro mist and 12～17wt% is raw material, add the water of above-mentioned raw materials 20～25wt% and the polycarboxylic acids dehydragent of 0.3～0.5wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.2～0.3wt%, mix, casting burns till under 1450～1600 ℃ condition after the drying, is incubated 3～4 hours.
Water reducer is that the volume density of polycarboxylic acids dehydragent, inorganic salts water reducer, Lignins water reducer, naphthalene water reducer present embodiment 1 prepared corundum-spinel lightweight heat-insulating material is 0.8～1.0g/cm
3, thermal conductivity is 0.2～0.4w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 1.0%～1.5%, and compressive strength reaches 3～10Mpa.
Embodiment 2:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 45～50wt%
2O
3α-Al of fine powder, 30～35wt%
2O
3ρ-Al of micro mist, 2～7wt%
2O
3The electrosmelted magnesite clinker of micro mist and 15～20wt% is raw material, add the water of above-mentioned raw materials 25～30wt% and the inorganic salts water reducer of 0.1～0.3wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.3～0.4wt%, mix, casting burns till under 16000～1700 ℃ condition after the drying, is incubated 4～5 hours.
The volume density of present embodiment 2 prepared corundum-spinel lightweight heat-insulating materials is 1.0～1.2g/cm
3, thermal conductivity is 0.3～0.5w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.8%～1.2%, and compressive strength reaches 6～15Mpa.
Embodiment 3:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 50～55wt%
2O
3α-Al of fine powder, 25～30wt%
2O
3ρ-Al of micro mist, 2～9wt%
2O
3The electrosmelted magnesite clinker of micro mist and 10～15wt% is raw material, add the water of above-mentioned raw materials 30～35wt% and the polycarboxylic acids dehydragent of 0.1～0.5wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.2～0.3wt%, mix, casting burns till under 1450～1600 ℃ condition after the drying, is incubated 3～4 hours.
The volume density of present embodiment 3 prepared corundum-spinel lightweight heat-insulating materials is 1.2～1.4g/cm
3, thermal conductivity is 0.4～0.6w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.5%～0.8%, and compressive strength reaches 10～20Mpa.
Embodiment 4:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 55～60wt%
2O
3α-Al of fine powder, 25～30wt%
2O
3ρ-Al of micro mist, 3～10wt%
2O
3The electrosmelted magnesite clinker of micro mist and 5～10wt% is raw material, add the water of above-mentioned raw materials 30～35wt% and the inorganic salts water reducer of 0.1～0.5wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.2～0.3wt%, mix, casting burns till under 1450～1600 ℃ condition after the drying, is incubated 4～5 hours.
The volume density of present embodiment 4 prepared corundum-spinel lightweight heat-insulating materials is 1.4～1.6g/cm
3, thermal conductivity is 0.5～0.7w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.5%～0.8%, and compressive strength reaches 20～30Mpa.
Embodiment 5:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 40～43wt%
2O
3α-Al of fine powder, 35～40wt%
2O
3ρ-Al of micro mist, 3～8wt%
2O
3The electrosmelted magnesite clinker of micro mist and 17～20wt% is raw material, add the water of above-mentioned raw materials 25～30wt% and the polycarboxylic acids dehydragent of 0.5～1wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.3～0.4wt%, mix, casting burns till under 1600～1700 ℃ condition after the drying, is incubated 3～4 hours.
The volume density of present embodiment 5 prepared corundum-spinel lightweight heat-insulating materials is 1.6～1.8g/cm
3, thermal conductivity is 0.6～0.8w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.7%～1.0%, and compressive strength reaches 30～40Mpa.
Embodiment 6:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 43～46wt%
2O
3α-Al of fine powder, 35～38wt%
2O
3ρ-Al of micro mist, 5～7wt%
2O
3The electrosmelted magnesite clinker of micro mist and 14～17wt% is raw material, add the water of above-mentioned raw materials 22～30wt% and the Lignins water reducer of 0.2～0.5wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.2～0.3wt%, mix, casting burns till under 1550～1700 ℃ condition after the drying, is incubated 4～5 hours.
The volume density of present embodiment 6 prepared corundum-spinel lightweight heat-insulating materials is 1.8～2.0g/cm
3, thermal conductivity is 0.7～0.9w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.8%～1.2%, and compressive strength reaches 40～50Mpa.
Embodiment 7:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 46～49wt%
2O
3α-Al of fine powder, 32～35wt%
2O
3ρ-Al of micro mist, 7～10wt%
2O
3The electrosmelted magnesite clinker of micro mist and 11～14wt% is raw material, add the water of above-mentioned raw materials 30～35wt% and the inorganic salts water reducer of 0.3～0.6wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.3～0.4wt%, mix, casting burns till under 1550～1700 ℃ condition after the drying, is incubated 3～4 hours.
The volume density of present embodiment 7 prepared corundum-spinel lightweight heat-insulating materials is 2.0～2.2g/cm
3, thermal conductivity is 0.8～1.0w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.7%～1.2%, and compressive strength reaches 50～60Mpa.
Embodiment 8:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 49～52wt%
2O
3α-Al of fine powder, 29～32wt%
2O
3ρ-Al of micro mist, 5～9wt%
2O
3The electrosmelted magnesite clinker of micro mist and 8～11wt% is raw material, add the water of above-mentioned raw materials 30～35wt% and the Lignins water reducer of 0.6～1wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.3～0.4wt%, mix, casting burns till under 1450～1600 ℃ condition after the drying, is incubated 4～5 hours.
The volume density of present embodiment 8 prepared corundum-spinel lightweight heat-insulating materials is 0.8～1.4g/cm
3, thermal conductivity is 0.2～0.6w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.7%～1.5%, and compressive strength reaches 3～20Mpa.
Embodiment 9:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 52～55wt%
2O
3α-Al of fine powder, 26～29wt%
2O
3ρ-Al of micro mist, 2～7wt%
2O
3The electrosmelted magnesite clinker of micro mist and 10～15wt% is raw material, add the water of above-mentioned raw materials 20～30wt% and the naphthalene water reducer of 0.1～0.3wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.2～0.3wt%, mix, casting burns till under 1550～1700 ℃ condition after the drying, is incubated 3～4 hours.
The volume density of present embodiment 9 prepared corundum-spinel lightweight heat-insulating materials is 1.4～1.8g/cm
3, thermal conductivity is 0.4～0.7w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.5%～1.0%, and compressive strength reaches 20～40Mpa.
Embodiment 10:
A kind of corundum-spinel lightweight heat-insulating material and preparation method thereof.α-Al with 55～60wt%
2O
3α-Al of fine powder, 25～35wt%
2O
3ρ-Al of micro mist, 3～8wt%
2O
3The electrosmelted magnesite clinker of micro mist and 5～10wt% is raw material, add the water of above-mentioned raw materials 25～35wt% and the inorganic salts water reducer of 0.3～0.5wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.3～0.4wt%, mix, casting burns till under 1450～1600 ℃ condition after the drying, is incubated 4～5 hours.
The volume density of present embodiment 10 prepared corundum-spinel lightweight heat-insulating materials is 1.8～2.2g/cm
3, thermal conductivity is 0.6～1.0w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.5%～0.8%, and compressive strength reaches 40～60Mpa.
This embodiment makes corundum-spinel lightweight heat-insulating material by single stage method, and operating procedure is simple, and save energy is low in the pollution of the environment; Because the foaming agent that mixes in this material can form the aperture that seals in a large number and be evenly distributed in material, gas molecule is difficult to mutually collision, and the result will make material thermal conductivity greatly lower; The a large amount of pores that form also make material have lower volume density, in addition, be raw material owing to adopt aluminum oxide and electrosmelted magnesite clinker, the two can reaction produce spinel in sintering process, and follow the necessarily volumetric expansion of (5～8%), thereby cause the volume density of material to reduce.
The volume density of the corundum-spinel lightweight heat-insulating material that this embodiment is prepared is 0.8～2.2g/cm
3, thermal conductivity is 0.2～1.0w/ (m.k) in the time of 500 ℃, and the line velocity of variation is 0.5%～1.5%, and compressive strength reaches 3～60Mpa.
Therefore, this embodiment has technique simply and the characteristics of save energy; Prepared corundum-spinel lightweight heat-insulating material has the intensity height, thermal conductivity is low and the advantage of microdilatancy, it is high because of thermal conductivity effectively to have solved the traditional lightweight lagging material, the shortcoming such as linear shrinkage after burning and in the equipment such as ladle, use the problem (the ladle rapid heat dissipation oozes steel etc.) that occurs.
Claims (5)
1. the preparation method of a corundum-spinel lightweight heat-insulating material is characterized in that the α-Al with 40～60wt%
2O
3α-Al of fine powder, 25～40wt%
2O
3ρ-Al of micro mist, 2～10wt%
2O
3The electrosmelted magnesite clinker of micro mist and 5～20wt% is raw material, add the water of above-mentioned raw materials 20～35wt% and the water reducer of 0.1～1wt%, mixed 3～5 minutes, add again the foaming agent of above-mentioned raw materials 0.2～0.4wt%, mix, casting burns till under 1450～1700 ℃ condition after the drying, is incubated 3～5 hours.
2. the preparation method of corundum-spinel lightweight heat-insulating material according to claim 1 is characterized in that described α-Al
2O
3The granularity of fine powder is 200 orders.
3. the preparation method of corundum-spinel lightweight heat-insulating material according to claim 1, the granularity that it is characterized in that described electrosmelted magnesite clinker is 200 orders.
4. the preparation method of corundum-spinel lightweight heat-insulating material according to claim 1 is characterized in that described water reducer is a kind of in polycarboxylic acids dehydragent, inorganic salts water reducer, Lignins water reducer, the naphthalene water reducer.
5. the prepared corundum-spinel lightweight heat-insulating material of preparation method of each described corundum-spinel lightweight heat-insulating material according to claim 1～4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010265125 CN101948300B (en) | 2010-08-26 | 2010-08-26 | Corundum-spinel lightweight heat-insulating material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010265125 CN101948300B (en) | 2010-08-26 | 2010-08-26 | Corundum-spinel lightweight heat-insulating material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101948300A CN101948300A (en) | 2011-01-19 |
| CN101948300B true CN101948300B (en) | 2013-01-16 |
Family
ID=43451950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010265125 Expired - Fee Related CN101948300B (en) | 2010-08-26 | 2010-08-26 | Corundum-spinel lightweight heat-insulating material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101948300B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659398B (en) * | 2012-04-25 | 2014-02-26 | 中钢集团洛阳耐火材料研究院有限公司 | Method for manufacturing light magnesia-alumina spinel insulation materials |
| CN103044044A (en) * | 2013-01-17 | 2013-04-17 | 武汉科技大学 | Lightweight aluminum oxide castable and preparation method thereof |
| CN105418083A (en) * | 2014-09-18 | 2016-03-23 | 镇江英赛德铸造材料有限公司 | Spinel material and manufacturing method thereof |
| CN105565795A (en) * | 2015-12-18 | 2016-05-11 | 湖南科技大学 | Preparation method of magnesia-alumina-spinel high-grade thermal-insulation material |
| CN109055666A (en) * | 2018-09-19 | 2018-12-21 | 郑州市晟火冶金节能材料有限公司 | A kind of dephosphorization spray gun and its special precast material |
| CN113943167B (en) * | 2021-12-02 | 2022-12-27 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007730A (en) * | 2007-01-18 | 2007-08-01 | 上海交通大学 | Alumina-spinel flame-proof material for refining aluminium furnace and its production method |
| CN101367663B (en) * | 2008-09-28 | 2011-08-31 | 瑞泰科技股份有限公司 | Melt-out recombined composite aluminum oxide refractory materials |
-
2010
- 2010-08-26 CN CN 201010265125 patent/CN101948300B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101948300A (en) | 2011-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101948300B (en) | Corundum-spinel lightweight heat-insulating material and preparation method thereof | |
| CN101805166B (en) | Porous insulation board and preparation method thereof | |
| CN103145434B (en) | Aluminum oxide lightweight, heat-insulating and refractory product and preparation method thereof | |
| CN104446568B (en) | A kind of fireproof insulation brick and preparation method thereof | |
| CN103044045B (en) | High-strength aluminum oxide light-weight heat insulation brick and preparation method thereof | |
| CN103496993B (en) | High-strength calcium hexa-aluminate light heat insulation material and preparation method thereof | |
| CN103342578B (en) | Porous insulating decorative material prepared by utilizing iron tailings and preparation method thereof | |
| CN101708997B (en) | Alumina light-weight brick and preparation method thereof | |
| CN103011856B (en) | Mullite light insulating brick and preparation method thereof | |
| CN102617180B (en) | Porous foamed ceramic and preparation method thereof | |
| CN103305039B (en) | Infrared radiation coating, preparation method thereof and infrared radiation coating | |
| CN104308085A (en) | Heating and insulating riser bush | |
| CN104556954A (en) | Magnesium phosphate cement-base porous material and preparation method thereof | |
| CN103044044A (en) | Lightweight aluminum oxide castable and preparation method thereof | |
| CN104355629B (en) | A kind of refractory materials and preparation method thereof | |
| CN105503216A (en) | Preparation method of light and high-strength alumina bubble product | |
| CN104446459B (en) | Preparation method for the Bubble zirconia insulating product of tungsten sintering intermediate frequency furnace | |
| CN103408312B (en) | Aluminum-silicon-based lightweight castable and preparation method thereof | |
| CN102260094A (en) | Preparation method of diffuse type permeable material | |
| CN103613874A (en) | Fireproof flame retardant polystyrene foam | |
| CN104973786A (en) | Low-thermal expansion coefficient glass ceramic disc and preparation method thereof | |
| CN104909822A (en) | Environmentally friendly vitrified microsphere inorganic insulation mortar and preparation method thereof | |
| CN103396105A (en) | Forsterite light aggregate and preparation method of same | |
| CN104387009B (en) | Building inorganic refuse external wall insulation method | |
| CN103922706B (en) | A kind of low-temperature sintering little proportion high strength Zirconia-alumina matrix material and preparation method thereof |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20160826 |