CN102531633A - Preparation method for neodymium oxide-cerium oxide compound nanomaterial - Google Patents
Preparation method for neodymium oxide-cerium oxide compound nanomaterial Download PDFInfo
- Publication number
- CN102531633A CN102531633A CN2010106208109A CN201010620810A CN102531633A CN 102531633 A CN102531633 A CN 102531633A CN 2010106208109 A CN2010106208109 A CN 2010106208109A CN 201010620810 A CN201010620810 A CN 201010620810A CN 102531633 A CN102531633 A CN 102531633A
- Authority
- CN
- China
- Prior art keywords
- cerium oxide
- silicon nitride
- neodymium trioxide
- preparation
- composite nano
- 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 the technical field of ceramic materials, in particular to a method for producing high-performance silicon nitride (Si3N4) ceramic by taking neodymium oxide and cerium oxide as additives through non-pressure sintering. The ceramic consists of the following components in percentage by mass: 3-7 percent of cerium oxide, 5-8 percent of neodymium oxide and 85-92 percent of silicon nitride. The invention aims to overcome the defects in the prior art, and provides a method for producing high-performance silicon nitride ceramic by taking neodymium oxide and cerium oxide as additives through non-pressure sintering; and the nanomaterial can be widely applied to manufacturing of parts in the fields of chemical engineering, machinery, metallurgy, aero-space, and the like.
Description
[technical field]
The present invention relates to a kind of technical field of ceramic material, specifically is the method for a kind of cerium oxide Neodymium trioxide as additive pressureless sintering production high-performance silicon nitride ceramics.
[background technology]
Silicon nitride ceramics has excellent mechanical behavior under high temperature, is acknowledged as one of the most rising high temperature resistant structure ceramics.Silicon nitride is as a kind of covalent linkage platform thing, and spread coefficient is little, does not have fusing point, decomposes ammonification and silicon about 2173K, is difficult to sintering.Common silicon nitride ceramics respond sintering and hot pressed sintering, the reaction sintering density is poor, poor mechanical property, though hot pressed sintering density is high, mechanical property is good, cost is higher, is difficult to scale operation.And pressureless sintering falls between, because silicon nitride ceramics is the covalent linkage compound, and the pressureless sintering difficulty, the density that improves the pressureless sintering silicon nitride ceramics becomes the research focus, adds rare earth oxide usually as sintering aid, like iridium oxide.But the cost of iridium oxide is higher, and is unfavorable for the application of silicon nitride.We select for use the cerium oxide Neodymium trioxide as sintered density and the mechanical property of additive to improve silicon nitride for this reason.
[summary of the invention]
The objective of the invention is to overcome the deficiency of prior art, the method for a kind of cerium oxide Neodymium trioxide as additive pressureless sintering production high-performance silicon nitride ceramics is provided.Working method of the present invention is simple, and cost is low, is prone to realize industrialization production; The silicon nitride ceramics that cerium oxide Neodymium trioxide of the present invention is produced as additive pressureless sintering has the density height, the characteristics that mechanical property is good.
The present invention realizes through following technical scheme:
The silicon nitride ceramics that cerium oxide Neodymium trioxide involved in the present invention is produced as additive pressureless sintering, component and mass percentage content are: cerium oxide 3%～7%, Neodymium trioxide 5%～8%, silicon nitride 85%～92%.
3～6 microns of described cerium oxide granularities, 5～7 microns of Neodymium trioxide granularities, 0.4～0.7 micron of silicon nitride granularity.
The silicon nitride ceramics method that cerium oxide Neodymium trioxide involved in the present invention is produced as additive pressureless sintering comprises the steps:
Step 1; Take by weighing cerium oxide Neodymium trioxide and silicon nitride ceramics powder respectively; In planetary ball mill, change mixing 2 hours with PM 270～330, dispersion medium is an absolute ethyl alcohol, subsequently 60 ℃ of oven dry; Time is 2～3 hours, cerium oxide Neodymium trioxide that obtains mixing and silicon nitride ceramics mixed powder;
Step 2 at 75～100Mpa forming under the pressure, forms biscuit with the mixed powder of step 1;
Step 3, with the biscuit in the step 2 in vacuum carbon tube furnace under nitrogen protection, under 1400～1550 ℃ of temperature, be incubated 12～18 hours.
Step 4 is taken out the silicon nitride ceramics that burns till in the step 3 detection volume density and mechanical property.
In the step 1, the weight percent of said cerium oxide is 3%～7%, and the weight percent of Neodymium trioxide is 5%～8%, and the weight percent of silicon nitride is 85%～92%.
In the step 1, α-Si in the said silicon nitride
3N
4Content is greater than 90%.
In the step 1, said cerium oxide Neodymium trioxide content is all greater than 98%.
In the step 3, said nitrogen gas pressure is 1～2 normal atmosphere.
In the step 4, said mechanical property is a folding strength.
Among the present invention, described cerium oxide Neodymium trioxide plays the effect of sintering aid, under 1400～1550 ℃ of high temperature sintering conditions, forms liquid phase, makes the silicon nitride ceramics densification.
The present invention has following beneficial effect: the silicon nitride ceramics compactness extent is high, and mechanical property is good, satisfies the actual needs that use.This preparation method is simple, and cost is low, is prone to realize industrialization production.
[embodiment]
Below in conjunction with embodiment the present invention is described further.Production technology of the present invention is to implement easily to this professional people.Present embodiment provided detailed embodiment and process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.The experimental technique of unreceipted actual conditions in the following example, usually according to normal condition, or the condition of advising according to manufacturer.
Embodiment
The cerium oxide Neodymium trioxide is Ganzhou Jiarun novel material ltd, and silicon nitride powder is the M11 powder that German Starck company produces.Take by weighing 3% cerium oxide, 5% Neodymium trioxide and 92% silicon nitride powder respectively according to weight percent.
Above-mentioned two kinds of powder (QM-3SP2 of Nanjing Univ. Instrument Factory type) in planetary ball mill are mixed, and rotating speed 300 changes 1.5 hours time.With the forming under the pressure of powder mix, biscuit (the flourish electric furnace ZT-40-20 of ltd of Shanghai occasion type) 1450 ℃ in vacuum carbon tube furnace is incubated 16 hours at 80Mpa.
The volume density of the silicon nitride ceramics that present embodiment obtains is 3.41g/cm
3, folding strength is 623Mpa.
Claims (7)
1. the silicon nitride ceramics produced as additive pressureless sintering of the related cerium oxide Neodymium trioxide of the preparation method of Neodymium trioxide cerium oxide composite nano materials; Component and mass percentage content are: cerium oxide 3%～7%; Neodymium trioxide 5%～8%, silicon nitride 85%～92%.3～6 microns of described cerium oxide granularities, 5～7 microns of Neodymium trioxide granularities, 0.4～0.7 micron of silicon nitride granularity.
2. the silicon nitride ceramics method that the related cerium oxide Neodymium trioxide of the preparation method of Neodymium trioxide cerium oxide composite nano materials according to claim 1 is produced as additive pressureless sintering comprises the steps:
Step 1; Take by weighing cerium oxide Neodymium trioxide and silicon nitride ceramics powder respectively; In planetary ball mill, change mixing 2 hours with PM 270～330, dispersion medium is an absolute ethyl alcohol, subsequently 60 ℃ of oven dry; Time is 2～3 hours, cerium oxide Neodymium trioxide that obtains mixing and silicon nitride ceramics mixed powder;
Step 2 at 75～100Mpa forming under the pressure, forms biscuit with the mixed powder of step 1;
Step 3, with the biscuit in the step 2 in vacuum carbon tube furnace under nitrogen protection, under 1400～1550 ℃ of temperature, be incubated 12～18 hours.
Step 4 is taken out the silicon nitride ceramics that burns till in the step 3 detection volume density and mechanical property.
3. the preparation method of Neodymium trioxide cerium oxide composite nano materials according to claim 2; The weight percent that it is characterized in that cerium oxide described in the step 1 is 3%～7%; The weight percent of Neodymium trioxide is 5%～8%, and the weight percent of silicon nitride is 85%～92%.
4. the preparation method of Neodymium trioxide cerium oxide composite nano materials according to claim 2 is characterized in that in the step 1, α-Si in the said silicon nitride
3N
4Content is greater than 90%.
5. the preparation method of Neodymium trioxide cerium oxide composite nano materials according to claim 2 is characterized in that in the step 1, and content is all greater than 98% in the said cerium oxide Neodymium trioxide.
6. the preparation method of Neodymium trioxide cerium oxide composite nano materials according to claim 2 is characterized in that in the step 3, and said nitrogen gas pressure is 1～2 normal atmosphere.
7. the preparation method of Neodymium trioxide cerium oxide composite nano materials according to claim 2 is characterized in that in the step 4, and said mechanical property is a folding strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106208109A CN102531633A (en) | 2010-12-29 | 2010-12-29 | Preparation method for neodymium oxide-cerium oxide compound nanomaterial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106208109A CN102531633A (en) | 2010-12-29 | 2010-12-29 | Preparation method for neodymium oxide-cerium oxide compound nanomaterial |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102531633A true CN102531633A (en) | 2012-07-04 |
Family
ID=46339827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106208109A Pending CN102531633A (en) | 2010-12-29 | 2010-12-29 | Preparation method for neodymium oxide-cerium oxide compound nanomaterial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102531633A (en) |
-
2010
- 2010-12-29 CN CN2010106208109A patent/CN102531633A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104045350B (en) | Method for preparing silicon nitride /silicon carbide ceramic composite by use of reaction sintering process | |
| JP4691891B2 (en) | C-SiC sintered body and manufacturing method thereof | |
| CN102557652A (en) | Preparation method for special silicon nitride ceramic compounded by cerium oxide | |
| CN102211940A (en) | Production method of high-property yttria silicon nitride ceramic | |
| CN102531624A (en) | Preparation method for compound silicon nitride ceramic added with trace neodymium oxide | |
| CN102557661A (en) | Method for preparing nano cerium oxide-samarium oxide composite silicon nitride ceramic material | |
| CN102557662A (en) | Method for preparing nano rare-earth lanthanum-cerium oxide composite nano-silicon nitride | |
| CN102531615A (en) | Process for producing silicon nitride ceramic stabilized by rare-earth praseodymium and holmium | |
| CN102557659A (en) | Method for producing ceramic material toughened with cerium and praseodymium | |
| CN102557657A (en) | Method for producing high-hardness samarium oxide compounded silicon nitride ceramic | |
| CN102557664A (en) | Pressureless sintering production process of thulium oxide-samarium oxide ceramic | |
| CN102775150A (en) | Production process for rare earth yttrium lanthanum composite silicon nitride ceramic | |
| CN102531629A (en) | Process for producing high-strength yttrium-dysprosium silicon nitride | |
| CN102557650A (en) | Method for preparing high-resistant lanthanum-chloride composited silicon nitride ceramic | |
| CN102531633A (en) | Preparation method for neodymium oxide-cerium oxide compound nanomaterial | |
| CN102531623A (en) | Preparation method for nano yttrium oxide-scandium oxide compound silicon nitride ceramic material | |
| CN102531628A (en) | Preparation method of scandium oxide-erbium oxide compound nano-ceramic | |
| CN102557655A (en) | Method for preparing nano thulium oxide-lanthanum oxide composite silicon nitride ceramic material | |
| CN102557649A (en) | Preparation method of high abrasion resistance samarium stable ceramic material | |
| CN102531616A (en) | Method for preparing high-performance silicon nitride ceramic with microscale cerium and erbium | |
| CN102557651A (en) | Preparation process of dysprosium oxide reinforced silicon nitride | |
| CN102557666A (en) | Method for preparing nanometer praseodymium oxide and neodymium oxide compound silicon nitride ceramic material | |
| CN102557654A (en) | Preparation method for nano-silicon nitride ceramic material compounded by erbium oxide and praseodymium oxide | |
| CN102531632A (en) | Process for producing nano ceramic by mixing rare-earth samarium and dysprosium | |
| CN102531618A (en) | Method for preparing silicon nitride ceramic compounded with dysprosium oxide and thulium oxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Suzhou zirconium new Mstar Technology Ltd Lu Shuping Document name: Notification of Publication of the Application for Invention |
|
| DD01 | Delivery of document by public notice |
Addressee: Lu Shuping Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| DD01 | Delivery of document by public notice |
Addressee: Lu Shuping Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |