JPS6350363A - Manufacture of antiabrasive alumina sintered body - Google Patents
Manufacture of antiabrasive alumina sintered bodyInfo
- Publication number
- JPS6350363A JPS6350363A JP61196070A JP19607086A JPS6350363A JP S6350363 A JPS6350363 A JP S6350363A JP 61196070 A JP61196070 A JP 61196070A JP 19607086 A JP19607086 A JP 19607086A JP S6350363 A JPS6350363 A JP S6350363A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- sintered body
- weight
- alumina sintered
- wear
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims description 36
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000002245 particle Substances 0.000 claims description 14
- 150000001340 alkali metals Chemical class 0.000 claims description 7
- 229910052783 alkali metal Inorganic materials 0.000 claims description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 5
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 5
- 239000004927 clay Substances 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 239000013078 crystal Substances 0.000 description 8
- 238000005245 sintering Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 239000000454 talc Substances 0.000 description 4
- 229910052623 talc Inorganic materials 0.000 description 4
- 239000010456 wollastonite Substances 0.000 description 4
- 229910052882 wollastonite Inorganic materials 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 229910052915 alkaline earth metal silicate Inorganic materials 0.000 description 1
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 description 1
- -1 and during sintering Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052621 halloysite Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
水頭は、粉砕用ボール、ビーズ、耐摩耗タイル等に使用
する耐摩耗性アルミナ焼結体の製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) Hydrohead relates to a method for producing wear-resistant alumina sintered bodies for use in grinding balls, beads, wear-resistant tiles, and the like.
（従来の技術）
従来より、耐摩耗性アルミナ焼結体としてはアルミナ９
９重量％程度の高＄：ｉ度のアルミナを使ったものより
、アルミナ９０〜９５重量％のアルミナ焼結体の方が耐
摩耗性に優れていることが知られている。(Conventional technology) Conventionally, alumina 9 has been used as a wear-resistant alumina sintered body.
It is known that an alumina sintered body containing 90 to 95% by weight of alumina has better wear resistance than one using alumina with a high $:i degree of about 9% by weight.
（解決しようとする開題点）
ところが、このようにアルミナにＭｇＯ，ＣａＯなどの
物質を添加したアルミナ９０〜９５＝ｘ％のアルミナ焼
結体でも、耐摩耗試験の重量減による耐摩耗性ではせい
ぜい１．０％が限界でそれ以上の耐摩耗性は得られてい
ない。(Opening problem to be solved) However, even with this alumina sintered body containing 90 to 95 = x% alumina in which substances such as MgO and CaO are added to alumina, the wear resistance due to weight reduction in the wear resistance test is at best 1.0% is the limit, and higher wear resistance has not been achieved.
また、このアルミナ９０〜９５重量％のアルミナ焼結体
は焼結温度が１５００℃以上と高く、このため高アルミ
ナ質等の特殊討火物を用いた窯を必要とするなどの問題
があった。In addition, the sintering temperature of this alumina sintered body containing 90 to 95% by weight of alumina is as high as 1,500°C or higher, which posed problems such as requiring a kiln using special refractory material such as high alumina. .
（開運を解決するための手段）
水皿は、これらの従来の耐摩耗性アルミナ焼結体の間屈
点を解消すべく研究の結果得られたものであり、高い耐
摩耗特性を得るため、平均粒径が１μｍ以下のアルミナ
８０〜９５重１％と粘土及びアルカリ金属あるいはアル
カリ土類金２珪＝塩を５〜２０重量％とを配合し、成形
して１５００℃以下で焼成するようにしたものである。(Means for solving the problem) The water tray was obtained as a result of research to eliminate the bending points of these conventional wear-resistant alumina sintered bodies, and in order to obtain high wear-resistant properties, 1% by weight of 80-95 alumina with an average particle size of 1 μm or less and 5-20% by weight of clay and alkali metal or alkaline earth gold 2 silica = salt, molded and fired at 1500°C or less. This is what I did.
本願に使用するアルミナとしては、平均粒径が１μｍ以
下でγ結晶が小さく反応焼結性に優れたものが好ましく
、アルミナの平均粒径が１μｍ以上となると耐摩耗性、
焼結性においては不利となる。また粘土としてはカオリ
ン、ハロイサイトなどの粘土鋸物を、アルカリ金属ある
いは、アルカリ土類金属の珪酸塩としては、Ｎａ２Ｏ，
に２０、ＭｇＯ，ＣａＯなどを含む長石、タルク、珪灰
石なを用いる。なお、この粘土及びアルカリ金属、ある
いはアルカリ土類金属の珪酸塩の間には、粘土とアルカ
リ金属あるいはアルカリ土類金属の珪酸塩との比率が粘
土が増加するとアルミナ焼結体の強度は増すが焼結温度
が高くなり、減少すると焼結温度は低くなるものの強度
が低下する関係がある。The alumina used in this application is preferably one with an average particle size of 1 μm or less, small γ crystals, and excellent reaction sintering properties. If the average particle size of alumina is 1 μm or more, wear resistance,
This is disadvantageous in terms of sinterability. In addition, clays such as kaolin and halloysite are used, and silicates of alkali metals or alkaline earth metals include Na2O,
20, feldspar, talc, and wollastonite containing MgO, CaO, etc. are used. Furthermore, between this clay and the silicate of alkali metal or alkaline earth metal, the strength of the alumina sintered body increases as the ratio of clay to the silicate of alkali metal or alkaline earth metal increases. There is a relationship that as the sintering temperature increases, and as it decreases, the sintering temperature decreases but the strength decreases.
（作用）
一般に、微細なアルミナは微粉となるほど反応性が窩く
、焼結時には急激に結晶成長が起りやすく、気孔が粒界
に排除さ九ないまま結晶内に閉じ込められ、結晶の大き
さも不揃いで、しかも倣密度のものしか得られないが、
本願はアルミナの平均粒径を１μｍ以下の微粉としてい
るにもかかわらず、このアルミナに珪酸塩、特にアルカ
リ金属あるいはアルカリ土類金属の珪酸塩を配合するこ
とにより、１５００℃以下でアルミナ粒子の間に液相が
形成され、液相中に微細なアルミナ粒子が粒成長するこ
となしに分散し、ｉｉ密な焼結体を得るわけである。(Function) In general, fine alumina becomes more reactive as it becomes finer powder, and during sintering, crystal growth tends to occur rapidly, pores are trapped within the crystal without being removed to the grain boundaries, and the size of the crystals becomes irregular. However, only the pattern density can be obtained,
Although the present application uses alumina as a fine powder with an average particle size of 1 μm or less, by blending a silicate, especially an alkali metal or alkaline earth metal silicate, with this alumina, it is possible to create a bond between alumina particles at 1500°C or less. A liquid phase is formed in the liquid phase, and fine alumina particles are dispersed in the liquid phase without grain growth, thereby obtaining a dense sintered body.
このようにしてできた焼結体は珪酸塩より生成するマト
リックス中に微訓でしかも硬度の高いアルミナ結晶を分
散するため、たとえマトリックスが支持力を失ってアル
ミナ結晶が離脱しても離脱した結晶が小さく、摩耗の進
行が非常し二遅くなり、結局耐摩耗性が高くなるわけで
ある。The sintered body made in this way disperses highly hard alumina crystals in the matrix formed from silicate, so even if the matrix loses its supporting force and the alumina crystals separate, the separated crystals The wear resistance is small, and the progress of wear is greatly slowed down, resulting in higher wear resistance.
（実施例） 以下木工の実施例を述べる。(Example) Examples of woodworking will be described below.
実施例１
アルミナ（平均粒径０．５μｍ）９０重量％タルク
３ 〃
珪灰石 ２１Ｉ
カオリン ５ 〃を配合、これ
に水及び分散剤を加湿式で混合し。Example 1 Alumina (average particle size 0.5 μm) 90% by weight talc
3 wollastonite 21I kaolin 5 was mixed with water and a dispersant in a humidified manner.
スプレードライヤーで粒径約５０μｍの粒子に造粒する
。この粒子を直径２０ｍｍのボールにＣ工Ｐ成形し。最
高温度１４５０℃で２時間焼成する。Particles with a particle size of approximately 50 μm are granulated using a spray dryer. The particles were molded into a ball with a diameter of 20 mm. Bake at a maximum temperature of 1450°C for 2 hours.
このボールの耐摩耗性試験の結果は重量減が０゜０２％
であった。The results of the abrasion resistance test for this ball showed that the weight reduction was 0.02%.
Met.
実施例２
アルミナ（平均粒径０．５μｍ）８２重量％長 石
８ 〃珪灰石
３ ノｔ
タルク ２ｕ
カオリン ５ 〃を実施例１に
同様にして成形し、最高温度１３００℃で焼結した。得
られたボールの耐摩耗性は０゜０３％であった。Example 2 Alumina (average particle size 0.5 μm) 82% by weight long stone 8 wollastonite
3 t talc 2 u kaolin 5 were molded in the same manner as in Example 1, and sintered at a maximum temperature of 1300°C. The abrasion resistance of the resulting ball was 0.03%.
比較例１
アルミナ（平均粒径２μｍ） ９５重重量タルク
３ ｕ
珪灰石 ２ 〃
を実施例１に同様にして成形し、最高温度１５５０℃で
焼結した。得られたボールの耐摩耗性は２゜３８％であ
った。Comparative example 1 Alumina (average particle size 2 μm) 95 weight talc
3 u Wollastonite 2 was molded in the same manner as in Example 1 and sintered at a maximum temperature of 1550°C. The abrasion resistance of the resulting ball was 2.38%.
比較例２
アルミナ（平均粒径０．５μｍ）１００重量９６をスプ
レードライヤーで造粒、実施例１と同様に成形し、最高
温度１５５０℃で焼結した。得られたボールの耐摩耗性
は３．１７％であった。Comparative Example 2 Alumina (average particle size: 0.5 μm) 100 weight 96 pieces was granulated using a spray dryer, molded in the same manner as in Example 1, and sintered at a maximum temperature of 1550°C. The abrasion resistance of the obtained ball was 3.17%.
なお１以上の討摩耗性試談は、ボール１ｋｇを水１Ωと
ともに２Ｑのアルミナポットに入れ、１１００ｐｐの回
転数で２４時間回した後の重量減少率を測った。In addition, one or more wear tests were carried out by placing 1 kg of balls in a 2Q alumina pot with 1 Ω of water, and measuring the weight loss rate after rotating at a rotation speed of 1100 pp for 24 hours.
（効果）
本願は平均粒径が小さく、シかもアルミナ粒界のマトリ
ックスが粘土及びアルカリ金属あるいはアルカリ土類金
属の珪飲塩によるガラスで作られているため低温で繊密
な焼結体を得ることが８来、アルミナの結晶をせいぜい
２μｍにおさえながら耐摩耗性に優れたアルミナ焼結体
を得ることができる。(Effects) The present invention has a small average grain size, and the matrix of the alumina grain boundaries is made of glass made of clay and silicate salt of alkali metals or alkaline earth metals, so a delicate sintered body can be obtained at low temperatures. For this reason, it is possible to obtain an alumina sintered body with excellent wear resistance while suppressing the alumina crystal size to at most 2 μm.
また、アルミナ焼結体の焼成温度が１５００℃以下でよ
いため、特殊な耐火物などを使用した窯を使用する必要
もなく、焼成温度も似温であるため但コストで焼詰体を
得ることができるなどの効果がある。In addition, since the firing temperature of the alumina sintered body is 1500℃ or less, there is no need to use a kiln using special refractories, and the firing temperature is similar, so it is possible to obtain a sintered body at a lower cost. There are effects such as being able to.
Claims (1)
土及びアルカリ金属あるいはアルカリ土類金属の珪酸塩
を５〜２０重量％添加し、成形後、１５００℃以下で焼
成することを特徴とする耐摩耗性アルミナ焼結体の製造
方法A wear-resistant product characterized by adding 5-20% by weight of clay and silicate of alkali metal or alkaline earth metal to 80-95% by weight of alumina with an average particle size of 1 μm or less, molding, and then firing at 1500°C or less. Manufacturing method of alumina sintered body
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61196070A JPS6350363A (en) | 1986-08-20 | 1986-08-20 | Manufacture of antiabrasive alumina sintered body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61196070A JPS6350363A (en) | 1986-08-20 | 1986-08-20 | Manufacture of antiabrasive alumina sintered body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6350363A true JPS6350363A (en) | 1988-03-03 |
Family
ID=16351697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61196070A Pending JPS6350363A (en) | 1986-08-20 | 1986-08-20 | Manufacture of antiabrasive alumina sintered body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6350363A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03148693A (en) * | 1990-02-02 | 1991-06-25 | Ricoh Co Ltd | Liquid crystal display |
| JPH03115635U (en) * | 1990-03-12 | 1991-11-29 | ||
| JPH04209751A (en) * | 1990-11-30 | 1992-07-31 | Toto Ltd | Alumina-based sintered compact and its production |
| JP2004292230A (en) * | 2003-03-26 | 2004-10-21 | Kyocera Corp | Wear resistant alumina sintered compact and method of manufacturing the same |
-
1986
- 1986-08-20 JP JP61196070A patent/JPS6350363A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03148693A (en) * | 1990-02-02 | 1991-06-25 | Ricoh Co Ltd | Liquid crystal display |
| JPH03115635U (en) * | 1990-03-12 | 1991-11-29 | ||
| JPH04209751A (en) * | 1990-11-30 | 1992-07-31 | Toto Ltd | Alumina-based sintered compact and its production |
| JP2004292230A (en) * | 2003-03-26 | 2004-10-21 | Kyocera Corp | Wear resistant alumina sintered compact and method of manufacturing the same |
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