CN101628812A - Method for preparing compact yttria ceramics - Google Patents
Method for preparing compact yttria ceramics Download PDFInfo
- Publication number
- CN101628812A CN101628812A CN200810012286A CN200810012286A CN101628812A CN 101628812 A CN101628812 A CN 101628812A CN 200810012286 A CN200810012286 A CN 200810012286A CN 200810012286 A CN200810012286 A CN 200810012286A CN 101628812 A CN101628812 A CN 101628812A
- Authority
- CN
- China
- Prior art keywords
- yttrium
- sintering
- yttria ceramics
- ceramics
- sintering aid
- 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.)
- Pending
Links
Abstract
The invention relates to technology for preparing ceramics, in particular to a method for preparing compact yttria ceramics. The method comprises the following steps: adding 0 to 20 mol percent of a sintering auxiliary agent; and heating at a temperature of between 1,100 and 1,800 DEG C to obtain the compact yttria ceramics with the relative density over 92 percent. The technology is characterized in that a small amount of sintering auxiliary agent is added to obtain a compact yttria ceramics material at a lower heating temperature.
Description
Technical field:
The present invention relates to ceramics processing, be specially a kind of method for preparing compact yttria ceramics.
Background technology:
China's yttrium oxide reserves are 720,000 tons, are the most abundant countries of reserves in the world.The development and utilization yttrium oxide not only can strengthen the development and utilization of the yttrium oxide resource of China's abundant, and can improve the production and the consumption structure of China's yttrium oxide, strengthens China and the competitive power of world developed country in the novel material development and utilization.
On the other hand, titanium and titanium alloy are extremely important 26S Proteasome Structure and Function materials, have very important using value and wide application prospect in fields such as Aeronautics and Astronautics, Vehicle Engineering, biomedical engineerings.In addition, titanium and titanium alloy casting be with its higher shaping handiness and lower manufacturing cost, extremely both at home and abroad investigators' extensive concern.Yet, because titanium has very high chemically reactive under the molten state, in castingprocesses, be easy to and refractory materials generation chemical reaction, surface quality deterioration, the mechanical property of foundry goods are reduced, so the melting of titanium and titanium alloy and casting difficulty are higher, the erosion-resisting characteristics that improves refractory materials is very important to the titanium industrial expansion.Though graphite, metal oxide refractory materialss such as (zirconium white, calcium oxide, yttrium oxide etc.) can meet the demands substantially, the main two aspect defectives that exist: be at cast(ing) surface formation reaction layer on the one hand, influence the surface quality of foundry goods; Be on the other hand in melting and castingprocesses because chemical erosion, the degradation of refractory materials, work-ing life reduce.These defectives all concentrate on the interface of refractory materials and molten titanium, so the surface reaction of research titanium and titanium alloy and refractory materials is very significant for work-ing life of the performance of improving titanium and titanium alloy casting, raising refractory materials.Studies show that the reaction of yttrium oxide and titanium or titanium alloy is very little, is a kind of titanium alloy melting and foundry refractory of excellent performance.But the yttrium oxide fusing point is higher, is difficult to prepare fine and close yttrium material, and the yttrium oxide crucible is few in the industrial application of titanium, so the preparation compact yttria ceramics has very important significance.
Summary of the invention:
The present invention adopts the interpolation sintering acid and method, and 1000 ℃ of-1800 ℃ of following heating can prepare fine and close yttrium.According to the difference in yttrium oxide source, implementation method can be divided into two kinds:
(1) direct sintering
With the yttrium oxide powder is raw material, and after sintering aid and the moulding of yttrium oxide powder mixing, 1300 ℃ of-1800 ℃ of following heating can obtain compact yttria ceramics:
A: yttrium oxide powder: particle diameter 0-500 μ m, purity 80-99.9wt%;
B: sintering aid: contain the material of elements such as calcium, silicon, as calcium oxide, silicon oxide, lime carbonate etc.;
C: sintering aid addition: the amount of elemental substances such as calcic, silicon is 0-20mol%;
D: sintering schedule: both can adopt direct heating and refrigerative method, and also can adopt high temperature sintering behind the low-temperature prewarming, low temperature continues the sintering schedule of heating then.Wherein, the temperature of heat is 1300 ℃-1800 ℃;
E: yttrium density: greater than 92%.
(2) two-step approach
In water or alcohol-water solution, utilize method such as co-precipitation to obtain nano level powder stock the water-soluble substance dissolves that contains the yttrium material and contain the sintering aid composition; Perhaps adopt combustion synthesis method to prepare nanoscale powder.1000 ℃ of-1800 ℃ of heating after the nanometer powder moulding can be obtained compact yttria ceramics under certain condition:
A: contain the yttrium material: material such as citric acid yttrium or Yttrium trinitrate that can be water-soluble, Yttrium trichloride;
B: sintering aid: the material of element such as siliceous, calcium, as nitrocalcite, sodium hexafluorisilicate, calcium chloride etc.;
C: sintering aid addition: the amount of elemental substances such as calcic, silicon is 0-20mol%;
D: nanometer powder preparation method: can adopt coprecipitation method, hydrothermal method, methods such as sol-gel method also can adopt combustion synthesis method;
E: sintering schedule: both can adopt the ordinary sinter method, and also can adopt high temperature sintering behind the low-temperature prewarming, low temperature continues the sintering schedule of heating then.Wherein, the temperature of heat is 1000 ℃-1800 ℃;
F: yttrium density: greater than 95%.
The present invention has following advantage:
1. prepare fine and close yttrium under lower sintering temperature, both energy-conserving and environment-protective have improved production efficiency again.
2. method two can accurately be controlled the content of sintering aid, and they are disperseed very uniformly, obtains the nano level raw material.Just can obtain compact yttria ceramics after utilizing this raw material to heat more than 1000 ℃.
3. technology is simple, and facility investment is few, helps large-scale industrialization production.
Embodiment:
Embodiment 1
With median size is that the yttrium oxide powder of 1 μ m is a raw material, and adding the 1mol% median size is the CaO powder of 1 μ m, utilize agate grind alms bowl with the abundant mixing of raw material after, with the forming under the pressure of metal die at 100MPa.Then sample is placed MoSi
21600 ℃ of heating 3h can obtain relative density and be 97% compact yttria ceramics in the resistance furnace.
Embodiment 2
In Yttrium trinitrate, add 1mol% nitrocalcite, then mix reagent is added alcohol-water ratio and be in 5: 1 the alcohol solution and dissolving fully.Under powerful stirring condition, keep for some time after slowly being heated to 75 ℃, then slowly the pH value of dropping ammonia in solution greater than 9.After utilizing deionized water and alcohol wash, 400 ℃ of calcinings behind the material complete drying that obtains can be obtained nano level powder.With metal die with the forming under the pressure of powder at 100MPa.Then sample is placed MoSi
21300 ℃ of heating 3h can obtain relative density and be 97% compact yttria ceramics in the resistance furnace.
Claims (2)
1, a kind of method for preparing compact yttria ceramics, comprise that the selection, sintering aid of raw material selected, sintering aid addition and preparation method.It is characterized in that:
A: material choice: the various materials that contain yttrium, as yttrium oxide, Yttrium trinitrate, Yttrium trichloride etc.;
B: sintering aid is selected: the material of elements such as various siliceous, calcium, as silicon-dioxide, sodium hexafluorisilicate, calcium oxide, lime carbonate, nitrocalcite etc.;
C: sintering aid addition: amount siliceous, the calcium constituent material is 0-20mol%;
D: preparation method: the yttrium material that contains that can be dissolved in water adopts two-step approach to prepare yttrium, and the water-fast yttrium material that contains adopts direct sintering to prepare yttrium.
2, according to the method for the described compact yttria ceramics of claim 1, it is characterized in that: adopt to add the 0-20mol% sintering aids, behind 1100 ℃ of-1800 ℃ of sintering, just can obtain relative density greater than 92% compact yttria ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810012286A CN101628812A (en) | 2008-07-14 | 2008-07-14 | Method for preparing compact yttria ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810012286A CN101628812A (en) | 2008-07-14 | 2008-07-14 | Method for preparing compact yttria ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101628812A true CN101628812A (en) | 2010-01-20 |
Family
ID=41574117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810012286A Pending CN101628812A (en) | 2008-07-14 | 2008-07-14 | Method for preparing compact yttria ceramics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101628812A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110793A (en) * | 2015-10-14 | 2015-12-02 | 哈尔滨工业大学 | Preparation method of yttrium oxide ceramic with high thermal shock resistance |
| CN105218097A (en) * | 2015-10-28 | 2016-01-06 | 山东大学 | A kind of preparation method of nuclear reactor view port crystalline ceramics |
| CN105849065A (en) * | 2014-04-03 | 2016-08-10 | 里弗雷克特里知识产权两合公司 | Composition for producing a shaped refractory ceramic product, a method for producing a shaped refractory ceramic product, and a shaped refractory ceramic product |
| CN107311658A (en) * | 2017-06-12 | 2017-11-03 | 上海大学 | Y2O3The preparation method of crucible and the application in high activity metal melting |
| CN108623315A (en) * | 2018-05-03 | 2018-10-09 | 苏州卫优知识产权运营有限公司 | A kind of preparation process of titanium alloy smelting oxidation yttrium powder |
| CN113620694A (en) * | 2021-09-03 | 2021-11-09 | 湖南昕昱科技有限公司 | Crucible for smelting alloy containing active elements and preparation method thereof |
| CN115196979A (en) * | 2022-01-17 | 2022-10-18 | 大连大学 | Preparation method of ceramic shell refractory material for titanium alloy precision casting |
| CN116134003A (en) * | 2020-10-03 | 2023-05-16 | 贺利氏科纳米北美有限责任公司 | Large size sintered yttria body |
-
2008
- 2008-07-14 CN CN200810012286A patent/CN101628812A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105849065A (en) * | 2014-04-03 | 2016-08-10 | 里弗雷克特里知识产权两合公司 | Composition for producing a shaped refractory ceramic product, a method for producing a shaped refractory ceramic product, and a shaped refractory ceramic product |
| CN105849065B (en) * | 2014-04-03 | 2019-06-04 | 里弗雷克特里知识产权两合公司 | The composition of production forming refractory ceramic product, the method and forming refractory ceramic product of production forming refractory ceramic product |
| CN105110793A (en) * | 2015-10-14 | 2015-12-02 | 哈尔滨工业大学 | Preparation method of yttrium oxide ceramic with high thermal shock resistance |
| CN105218097A (en) * | 2015-10-28 | 2016-01-06 | 山东大学 | A kind of preparation method of nuclear reactor view port crystalline ceramics |
| CN107311658A (en) * | 2017-06-12 | 2017-11-03 | 上海大学 | Y2O3The preparation method of crucible and the application in high activity metal melting |
| CN108623315A (en) * | 2018-05-03 | 2018-10-09 | 苏州卫优知识产权运营有限公司 | A kind of preparation process of titanium alloy smelting oxidation yttrium powder |
| CN116134003A (en) * | 2020-10-03 | 2023-05-16 | 贺利氏科纳米北美有限责任公司 | Large size sintered yttria body |
| CN113620694A (en) * | 2021-09-03 | 2021-11-09 | 湖南昕昱科技有限公司 | Crucible for smelting alloy containing active elements and preparation method thereof |
| CN115196979A (en) * | 2022-01-17 | 2022-10-18 | 大连大学 | Preparation method of ceramic shell refractory material for titanium alloy precision casting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101628812A (en) | Method for preparing compact yttria ceramics | |
| TWI527763B (en) | Method for forming basic nickel carbonate | |
| CN101148779B (en) | Preparation method for potassium titanate crystal whisker | |
| CN100395360C (en) | Method for preparing copper base composite material by chemical precipitation method to obtain composite powder | |
| CN102234116B (en) | Method for preparing nano white carbon black by utilizing iron tailings | |
| CN110228797B (en) | Method for preparing two-dimensional molybdenum nitride or tungsten nitride nanosheets at low cost | |
| CN103950946B (en) | A kind of preparation method of niobium (Nb) boride nano-powder | |
| CN109052969B (en) | Method for producing microcrystalline glass by using calcium iron garnet type red mud | |
| CN111153434A (en) | Preparation method of lanthanum zirconate spherical powder for thermal spraying | |
| CN101462760A (en) | Method for preparing high performance yttrium oxide material | |
| CN101311372B (en) | Low-temperature molten salt thermal inversion preparation method of aporate-crystal antifungin whiskers | |
| CN101187042A (en) | Method for preparing TiC mTiO sosoloid using titanium complex ore as material | |
| CN103183372A (en) | Solid-phase preparation method for nano zinc oxide through template | |
| CN108046620B (en) | A method of it is prepared by magnesite light burnt powder containing chrome-magnesite | |
| CN102230223B (en) | Method for preparing magnesium potassium titanate by directly utilizing magnesium oxide | |
| CN104371703A (en) | Method for preparing oil fracturing proppant from high-aluminum fly ash | |
| CN101462758A (en) | Method for preparing hydration resistant calcia material | |
| CN106367810A (en) | Method for synthesizing potassium magnesium titanate lamellar crystals from lamellar raw material | |
| CN109546126A (en) | A kind of transition metal element doped carbon coating lithium titanate, preparation method and application | |
| CN101497524A (en) | Preparation of compact magnesia partial stabilized zirconia ceramic | |
| CN103979566B (en) | A kind of vanadium diboride raw powder's production technology | |
| CN101786669B (en) | Alpha-ferric oxide mesoscopic crystal preparation method | |
| CN107739059A (en) | A kind of method that nonferrous heavy metal material prepares battery level sulphate | |
| CN102181933A (en) | Method for synthesizing one-dimensional nano magnesium borate crystal whisker by using concentrated seawater | |
| CN104495939B (en) | The hydrothermal synthesis method of nanoscale tungsten wire array hollow ball |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100120 |