CN103011872A - Preparation method of silicon nitride toughening ceramic - Google Patents

Preparation method of silicon nitride toughening ceramic Download PDF

Info

Publication number
CN103011872A
CN103011872A CN 201210496627 CN201210496627A CN103011872A CN 103011872 A CN103011872 A CN 103011872A CN 201210496627 CN201210496627 CN 201210496627 CN 201210496627 A CN201210496627 A CN 201210496627A CN 103011872 A CN103011872 A CN 103011872A
Authority
CN
China
Prior art keywords
sintering
silicon nitride
ceramic
batch mixing
ball milling
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
Application number
CN 201210496627
Other languages
Chinese (zh)
Inventor
李东炬
甄恒洲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DALIAN DAYOU HI-TECH CERAMIC Co Ltd
Original Assignee
DALIAN DAYOU HI-TECH CERAMIC Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DALIAN DAYOU HI-TECH CERAMIC Co Ltd filed Critical DALIAN DAYOU HI-TECH CERAMIC Co Ltd
Priority to CN 201210496627 priority Critical patent/CN103011872A/en
Publication of CN103011872A publication Critical patent/CN103011872A/en
Pending legal-status Critical Current

Links

Abstract

The invention relates to a preparation method of silicon nitride toughening ceramic, belonging to the field of ceramics preparation. The preparation method of the silicon nitride toughening ceramic comprises the steps of: mixing, ball-grinding and sintering, wherein the ceramic raw material comprises the following components in percentage by mass: 65-85 percent of beta-Si3N4, 10-25 percent of SiC whisker and 5-10 percent of sintering additive. The preparation method can realize that the silicon nitride toughening ceramic is sintered at a normal pressure, is simple in steps and convenient and easy to operate. The silicon nitride toughening ceramic prepared by using the method has the advantages of high strength, good compactness, remarkably improved flexibility, and excellent high temperature and abrasion resistance, and can be widely applied to various fields with high requirement of material strength.

Description

A kind of preparation method of silicon nitride toughening ceramic
Technical field
The present invention relates to a kind of preparation method of silicon nitride toughening ceramic, belong to ceramic preparation field.
Background technology
Silicon carbide whisker is a kind of few defects, and the single crystal fibre of certain length-to-diameter ratio is arranged, and it has goodish high temperature resistant property and high strength very.It is very high and extremely high temperature resistant that silicon nitride ceramics has high intensity, and its intensity does not descend at 1200 ℃ high temperature, can not be melt into after being heated and melt body, simultaneously, its resistance to chemical corrosion is excellent, the mineral acid that ability is nearly all and 30% following caustic soda soln, the also a lot of organic acid corrosion of ability.
The sintering process of silicon nitride ceramics is generally three kinds: hot isostatic pressing (HIP), hot pressing (HP) and gas pressure sintering.The pressure of atmosphere sintering is 5~10MPa, and the pressure of hot pressed sintering is about 70Mpa, and the pressure of the sintering of hot isostatic pressing is 150MPa ~ 200MPa.
Summary of the invention
The purpose of this invention is to provide the preparation method that a kind of silicon nitride strengthens pottery, this preparation method can realize that sintered silicon nitride strengthens pottery under normal pressure, the silicon nitride enhancing ceramics strength that utilizes the method to prepare is high, compactness good, toughness obviously improves, and high temperature resistant and wear-resisting excellence can be widely used in various to the demanding field of the strength of materials.
A kind of preparation method of silicon nitride toughening ceramic comprises the step of batch mixing, ball milling and sintering, and in the described batch mixing step, ceramic raw material by mass percentage, is comprised of following component:
β-Si 3N 4 65%~85%
SiC whisker 10% ~ 25%
Sintering aid 5%~10%.
The preferred described sintering aid of the preparation method of silicon nitride toughening ceramic of the present invention is selected from Al 2O 3, MgO, Y 2O 3, ZrO 2In at least a.
The preferred described ceramic raw material of the preparation method of silicon nitride toughening ceramic of the present invention by mass percentage, is comprised of following component:
β-Si 3N 4 70%~80%
SiC whisker 15% ~ 25%
Sintering aid 5%~10%.
The preferred described ceramic raw material of the preparation method of silicon nitride toughening ceramic of the present invention by mass percentage, is comprised of following component:
β-Si 3N 4 75%
SiC whisker 20%
Sintering aid 5%.
The preferred described sintering aid of the preparation method of silicon nitride toughening ceramic of the present invention by mass percentage, is comprised of following component:
Al 2O 3 60%
MgO 20%
Y 2O 3 20%。
The preferred described step that is sintered to pressureless sintering of the preparation method of silicon nitride toughening ceramic of the present invention, undertaken by following technique: under the normal pressure, powder is placed mould, speed with 60 ~ 80 ℃/min in sintering oven is warming up to 1600 ℃~1800 ℃, insulation 0.5h ~ 2h cools to room temperature with the furnace behind the stopped heating.
The preferred described ball milling step of the preparation method of silicon nitride toughening ceramic of the present invention is undertaken by following technique: under the normal temperature, will place ball mill through the powder of batch mixing, in speed ball milling 6h~10h of 300 ~ 360r/min.
The preferred described batch mixing step of the preparation method of silicon nitride toughening ceramic of the present invention is undertaken by following technique: ceramic raw material is after drying mixed in proportion, cross 80 ~ 200 mesh sieves.
The further preferred following technical proposals of the preparation method of silicon nitride toughening ceramic of the present invention:
A kind of preparation method of silicon nitride toughening ceramic comprises following processing step:
1. batch mixing: ceramic raw material is after drying mixed in proportion, cross 80 ~ 200 mesh sieves;
2. ball milling: under the normal temperature, will place ball mill through the powder of batch mixing, in speed ball milling 6h~10h of 300 ~ 360r/min;
3. sintering: under the normal pressure, powder is placed mould, the speed with 60 ~ 80 ℃/min in sintering oven is warming up to 1600 ℃~1800 ℃, and insulation 0.5h ~ 2h cools to room temperature with the furnace behind the stopped heating.
The invention has the beneficial effects as follows: the invention provides a kind of preparation method of silicon nitride toughening ceramic, comprise the step of batch mixing, ball milling and sintering, described ceramic raw material by mass percentage, is comprised of following component: β-Si 3N 4: 65% ~ 85%, SiC whisker: 10% ~ 25%, sintering aid: 5% ~ 10%.This preparation method can realize sintered silicon nitride toughening ceramic under normal pressure, and step is simple, convenient and easy simultaneously.The silicon nitride enhancing ceramics strength that utilizes the method to prepare is high, compactness good, toughness obviously improves, and high temperature resistant and wear-resisting excellence, can be widely used in various to the demanding field of the strength of materials.
Embodiment
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
Embodiment 1
1. batch mixing: ceramic raw material is after drying mixed in proportion, cross 200 mesh sieves, described ceramic raw material by mass percentage, is comprised of following component:
β-Si 3N 4 75%
SiC whisker 20%
Sintering aid 5%.
Described sintering aid by mass percentage, is comprised of following component:
Al 2O 3 60%
MgO 20%
Y 2O 3 20%。
2. ball milling: under the normal temperature, will place ball mill through the powder of batch mixing, in the speed ball milling 8h of 300r/min;
3. sintering: under the normal pressure, powder is placed mould, the speed with 60 ℃/min in sintering oven is warming up to 1700 ℃, and insulation 1h cools to room temperature with the furnace behind the stopped heating.

Claims (9)

1. the preparation method of a silicon nitride toughening ceramic comprises the step of batch mixing, ball milling and sintering, and it is characterized in that: in the described batch mixing step, ceramic raw material by mass percentage, is comprised of following component:
β-Si 3N 4 65%~85%
SiC whisker 10% ~ 25%
Sintering aid 5%~10%.
2. method according to claim 1, it is characterized in that: described sintering aid is selected from Al 2O 3, MgO, Y 2O 3, ZrO 2In at least a.
3. method according to claim 1, it is characterized in that: described ceramic raw material by mass percentage, is comprised of following component:
β-Si 3N 4 70%~80%
SiC whisker 15% ~ 25%
Sintering aid 5% ~ 10%.
4. method according to claim 1, it is characterized in that: described ceramic raw material by mass percentage, is comprised of following component:
β-Si 3N 4 75%
SiC whisker 20%
Sintering aid 5%.
5. method according to claim 1, it is characterized in that: described sintering aid by mass percentage, is comprised of following component:
Al 2O 3 60%
MgO 20%
Y 2O 3 20%。
6. method according to claim 1, it is characterized in that: the described step that is sintered to pressureless sintering, undertaken by following technique: under the normal pressure, powder is placed mould, speed with 60 ~ 80 ℃/min in sintering oven is warming up to 1600 ℃~1800 ℃, insulation 0.5h ~ 2h cools to room temperature with the furnace behind the stopped heating.
7. method according to claim 1 is characterized in that: described ball milling step, undertaken by following technique: under the normal temperature, will place ball mill through the powder of batch mixing, in speed ball milling 6h~10h of 300 ~ 360r/min.
8. method according to claim 1 is characterized in that: described batch mixing step, undertaken by following technique: ceramic raw material is after drying mixed in proportion, cross 80 ~ 200 mesh sieves.
9. the described method of arbitrary claim according to claim 1 ~ 8 is characterized in that: comprise following processing step:
1. batch mixing: ceramic raw material is after drying mixed in proportion, cross 80 ~ 200 mesh sieves;
2. ball milling: under the normal temperature, will place ball mill through the powder of batch mixing, in speed ball milling 6h ~ 10h of 300 ~ 360r/min;
3. sintering: under the normal pressure, powder is placed mould, the speed with 60 ~ 80 ℃/min in sintering oven is warming up to 1600 ℃ ~ 1800 ℃, and insulation 0.5h ~ 2h cools to room temperature with the furnace behind the stopped heating.
CN 201210496627 2012-11-28 2012-11-28 Preparation method of silicon nitride toughening ceramic Pending CN103011872A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201210496627 CN103011872A (en) 2012-11-28 2012-11-28 Preparation method of silicon nitride toughening ceramic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201210496627 CN103011872A (en) 2012-11-28 2012-11-28 Preparation method of silicon nitride toughening ceramic

Publications (1)

Publication Number Publication Date
CN103011872A true CN103011872A (en) 2013-04-03

Family

ID=47961040

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201210496627 Pending CN103011872A (en) 2012-11-28 2012-11-28 Preparation method of silicon nitride toughening ceramic

Country Status (1)

Country Link
CN (1) CN103011872A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104387101A (en) * 2014-11-07 2015-03-04 合肥大安印刷有限责任公司 Silicon carbide whisker reinforced ceramic for cutting tools and preparation method thereof
CN106116590A (en) * 2016-06-27 2016-11-16 南京理工大学 A kind of silicon nitride and silicon carbide micron composite ceramic tool material and microwave sintering preparation method thereof
CN106699192A (en) * 2017-02-24 2017-05-24 中南大学 Functional ceramic gel tape-casting slurry and preparation method thereof
CN111548164A (en) * 2020-05-19 2020-08-18 中钢集团洛阳耐火材料研究院有限公司 Continuous self-toughening nitride-bonded silicon carbide refractory material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104387101A (en) * 2014-11-07 2015-03-04 合肥大安印刷有限责任公司 Silicon carbide whisker reinforced ceramic for cutting tools and preparation method thereof
CN106116590A (en) * 2016-06-27 2016-11-16 南京理工大学 A kind of silicon nitride and silicon carbide micron composite ceramic tool material and microwave sintering preparation method thereof
CN106699192A (en) * 2017-02-24 2017-05-24 中南大学 Functional ceramic gel tape-casting slurry and preparation method thereof
CN111548164A (en) * 2020-05-19 2020-08-18 中钢集团洛阳耐火材料研究院有限公司 Continuous self-toughening nitride-bonded silicon carbide refractory material

Similar Documents

Publication Publication Date Title
CN103011872A (en) Preparation method of silicon nitride toughening ceramic
CN104944930A (en) Refractory sagger and preparation method thereof
CN106007758A (en) Toughened silicon nitride combined silicon carbide ceramic composite material and preparation method thereof
CN105384450B (en) Silicon-aluminum sol strengthens the production method of silicon carbide kiln furniture
CN108439995A (en) A kind of complex phase ceramic and preparation method thereof
CN103011834A (en) Preparation method for high-compactness composite ceramic
CN104926346A (en) Interface-phase-including alumina fibrous fabric reinforced silicon carbide ceramic and preparation method thereof
CN104045350B (en) Method for preparing silicon nitride /silicon carbide ceramic composite by use of reaction sintering process
CN104987076A (en) High-toughness silicon carbide ceramic and low-temperature sintering technology thereof
CN105254307A (en) Method for preparing Si3N4- O'-Sialon-TiN ceramic ball material
CN103848627A (en) Silicon nitride ceramic
CN103848639A (en) Silicon nitride toughened ceramic
CN103030398A (en) Preparation method of silicon nitride ceramic
CN100537478C (en) Liquid phase sintering, premixing and pelletizing process for preparing SiC ceramic powder
CN103011873A (en) Preparation method of silicon nitride toughening ceramic ball
CN102503431B (en) Silicon carbide ceramic product and preparation method
CN103641479B (en) A kind of preparation method of sheet AlON/WC matrix material
CN103664187B (en) A kind of sheet AlON/WB 2the preparation method of matrix material
CN102898139A (en) Preparation method of high-strength Si3N4/SiC composite ceramics
CN103664167B (en) Method for preparing flaky AlON/tetragonal-phase ZrO2 composite material
CN108341660B (en) Ceramic using industrial waste residue as auxiliary agent and preparation method thereof
CN102503488A (en) Method for preparing sialon bonded zirconium oxide refractory
CN106747443B (en) Method for preparing complex phase ceramic by introducing zirconium carbide through sol-gel method
CN103664178B (en) Preparation method for sheet AlON/VC composite material
CN103664177B (en) Preparation method for sheet AlON/NbC composite material

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130403