JPS61168562A - Alumina ceramic - Google Patents
Alumina ceramicInfo
- Publication number
- JPS61168562A JPS61168562A JP60010459A JP1045985A JPS61168562A JP S61168562 A JPS61168562 A JP S61168562A JP 60010459 A JP60010459 A JP 60010459A JP 1045985 A JP1045985 A JP 1045985A JP S61168562 A JPS61168562 A JP S61168562A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- strength
- weight
- alumina porcelain
- firing
- 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
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 〔発明の技術分野〕 本発明はアルミナ磁器の改良に関する。[Detailed description of the invention] [Technical field of invention] The present invention relates to improvements in alumina porcelain.
アルミナ磁器は現在最も応用の進んでいる高強度セラミ
ックスである。その発展のちととなった初期のアルミナ
磁器はアルミナ含有率９９％以上の高純度のものであっ
たため、焼成温度が非常に高く焼成エネルギーコストが
高騰し、これが工業化する上での大きな障害となってい
た。そこで、アルミナ粉末を低温で焼成して高強度のア
ルミナ磁器を得るために種々の添加物が検討されてきた
。こうした添加物としては、例えばＳ ｉ０２゜ＣａＯ
１Ｃｒ２０３、ＭｇＯ等が挙げられる。Alumina porcelain is currently the most widely used high-strength ceramic. The early alumina porcelain that led to its development had a high purity alumina content of over 99%, so the firing temperature was extremely high, causing the firing energy cost to soar, which became a major obstacle to industrialization. was. Therefore, various additives have been investigated in order to obtain high-strength alumina porcelain by firing alumina powder at low temperatures. Such additives include, for example, Si02゜CaO
Examples include 1Cr203 and MgO.
しかし、これらの添加物はいずれも添加量が多いため、
得られる磁器はアルミナ本来の強度を維持することがで
きず、強度が弱くなるという欠点があった。However, since the amounts of these additives are large,
The resulting porcelain was unable to maintain the original strength of alumina, and had the disadvantage of becoming weaker.
本発明は上記事情に鑑みてなされたものであり、適当な
添加物を加えて焼成温度を低くすることができ、しかも
強度に優れたアルミナ磁器を提供しようとするものであ
る。The present invention has been made in view of the above circumstances, and aims to provide alumina porcelain that can lower the firing temperature by adding appropriate additives and has excellent strength.
本発明のアルミナ磁器は、Ａｔ２０−４を９４〜９８％
、ＭｎＯ，ＴｉＯ２及びＢ２Ｏ３のうち１種又は２種以
上を６〜１重量％含有することを特徴とするものである
。The alumina porcelain of the present invention contains 94 to 98% At20-4.
, MnO, TiO2 and B2O3 in an amount of 6 to 1% by weight.
このようなアルミナ磁器によれば、焼成温度を１２００
〜１３５０℃に低下させて焼成エネルギーコストを安価
にすることができ、しかも高強度を維持することができ
る。According to such alumina porcelain, the firing temperature is 1200
By lowering the temperature to 1350° C., the firing energy cost can be reduced, and high strength can be maintained.
本発明においてＭｎＯ，ＴｉＯ２及びＢ２Ｏ３のうち１
種又は２種以上の添加量を６〜１重景重量したのは、こ
れらの添加量が６重量％を超えると強度が低下し、一方
１重量％未満であると焼成温度が高くなり焼成エネルギ
ーコストが高騰するためである。In the present invention, one of MnO, TiO2 and B2O3
The reason why the amount of seeds or two or more added is set at 6 to 1 weight percent is that if the amount of these additions exceeds 6% by weight, the strength will decrease, while if it is less than 1% by weight, the firing temperature will increase and the firing energy will decrease. This is because costs are rising.
なお、本発明においては上記の添加物の他に、ＣａＯ，
ＭｇＯ及びＳ １０２（７）うち１種又は２種以上を１
重量％以下添加してもよい、また、原料のアルミナ粉末
の平均粒径は０．５ｐｍ以下であることが望ましい。In addition, in the present invention, in addition to the above additives, CaO,
One or more of MgO and S 102 (7) in 1
It may be added in an amount of 0.5 pm or less, and the average particle size of the raw material alumina powder is preferably 0.5 pm or less.
以下１本発明の実施例について説明する。 An embodiment of the present invention will be described below.
まず、下記表に示す割合で原料粉末を配合し。First, raw material powders were mixed in the proportions shown in the table below.
バインダーを加えて造粒した後、成形した０次いで、こ
の成形体を下記表に示す温度で焼成してアルミナ磁器を
得た。After adding a binder and granulating it, the molded product was molded.Then, this molded product was fired at the temperature shown in the table below to obtain alumina porcelain.
得られたアルミナ磁器について、吸水率、比重及び曲げ
強度を測定した。これらの結果を下記表に併記する。な
お、吸水率はいずれも０であった自
上記表から明らかなように、比較例１のものは添加物の
添加量が６重量％を超えているため、曲げ強度が劣って
いる。また、比較例２のものは添加物の添加量が１重量
％未満であるため、曲げ強度が優れているものの、焼成
温度が著しく高く、焼成エネルギーコストが高騰した。The water absorption rate, specific gravity, and bending strength of the obtained alumina porcelain were measured. These results are also listed in the table below. Incidentally, as is clear from the above table in which the water absorption rate was 0 in all cases, the bending strength of Comparative Example 1 was poor because the amount of additive exceeded 6% by weight. Further, in Comparative Example 2, the amount of additives added was less than 1% by weight, so although the bending strength was excellent, the firing temperature was extremely high, and the firing energy cost soared.
これに対して実施例１〜５のものはいずれも焼成温度が
低く、しかも４５ ｋｇ／層■２程度の高強度を維持し
ている。On the other hand, all of Examples 1 to 5 had a low firing temperature and maintained a high strength of about 45 kg/layer 2.
以上詳述した如く本発明のアルミナ磁器によれば、焼成
温度を１２００〜１３５０℃に低下させて焼成エネルギ
ーコストを安価にすることができ、しかも高強度を維持
することができるものである。As detailed above, according to the alumina porcelain of the present invention, the firing temperature can be lowered to 1,200 to 1,350°C, thereby reducing the firing energy cost, and high strength can be maintained.
Claims (2)
ｉＯ＿２及びＢ＿２Ｏ＿３のうち１種又は２種以上を６
〜１重量％含有することを特徴とするアルミナ磁器。(1) 94-98% by weight of Al_2O_3, MnO, T
6 one or more of iO_2 and B_2O_3
Alumina porcelain characterized by containing ~1% by weight.
種以上を１重量％以下添加したことを特徴とする特許請
求の範囲第１項記載のアルミナ磁器。(2) One or two of CaO, MgO and SiO_2
The alumina porcelain according to claim 1, characterized in that 1% by weight or less of at least one species is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60010459A JPS61168562A (en) | 1985-01-23 | 1985-01-23 | Alumina ceramic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60010459A JPS61168562A (en) | 1985-01-23 | 1985-01-23 | Alumina ceramic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61168562A true JPS61168562A (en) | 1986-07-30 |
Family
ID=11750720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60010459A Pending JPS61168562A (en) | 1985-01-23 | 1985-01-23 | Alumina ceramic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61168562A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6549094B2 (en) | 2000-09-08 | 2003-04-15 | Murata Manufacturing Co. Ltd | High frequency ceramic compact, use thereof, and method of producing the same |
-
1985
- 1985-01-23 JP JP60010459A patent/JPS61168562A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6549094B2 (en) | 2000-09-08 | 2003-04-15 | Murata Manufacturing Co. Ltd | High frequency ceramic compact, use thereof, and method of producing the same |
| KR100434422B1 (en) * | 2000-09-08 | 2004-06-04 | 가부시키가이샤 무라타 세이사쿠쇼 | High frequency ceramic compact, use thereof and method of producing the same |
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