JPS6055460B2 - Alumina sintered pellets for neutron absorption - Google Patents
Alumina sintered pellets for neutron absorptionInfo
- Publication number
- JPS6055460B2 JPS6055460B2 JP55110580A JP11058080A JPS6055460B2 JP S6055460 B2 JPS6055460 B2 JP S6055460B2 JP 55110580 A JP55110580 A JP 55110580A JP 11058080 A JP11058080 A JP 11058080A JP S6055460 B2 JPS6055460 B2 JP S6055460B2
- Authority
- JP
- Japan
- Prior art keywords
- neutron absorption
- alumina sintered
- alumina
- sintered pellets
- pellets
- 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.)
- Expired
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
【発明の詳細な説明】 本発明は中性子吸収作用を有するＧｄ。[Detailed description of the invention] The present invention relates to Gd which has a neutron absorption effect.
０３を含むアルミナ焼結ペレットに関する。The present invention relates to alumina sintered pellets containing 03.
従来、原子炉等においては中性子遮蔽を目的として、ス
テンレスパイプにＧｄ２Ｏ３粉末を含むアルミナ粉末を
充填した中性子吸収部材が用いられている。BACKGROUND ART Conventionally, in nuclear reactors and the like, a neutron absorbing member in which a stainless steel pipe is filled with alumina powder containing Gd2O3 powder has been used for the purpose of shielding neutrons.
しかしながら、かかる中性子吸収部材にあつては、ステ
ンレスパイプに対するＧｄ２Ｏ３９アルミナ混合粉末の
充填密度を高められないこと、Ｇ山００粉末が均一分散
せす偏在すること、により充分効果的な中性子吸収性能
を発揮できない欠点があつた。これに対し、本発明者は
上記欠点を克服すべく鋭意研究した結果、Ｇｄ。However, such neutron absorbing members exhibit sufficiently effective neutron absorbing performance due to the inability to increase the packing density of the Gd2O39 alumina mixed powder to the stainless steel pipe, and the fact that the G mountain 00 powder is uniformly dispersed and unevenly distributed. There was a drawback that I couldn't do it. On the other hand, as a result of intensive research by the present inventors to overcome the above-mentioned drawbacks, Gd.
Ｏ。を所定量含むアルミナ粉を適宜なバインダを介して
混練し、ペレット状に成形し、これを成形することによ
つて、ＧｄがＧｄＡ１Ｏ。の形で均一に分散され、かつ
ステンレスパイブヘの散布充填性に優れ、中性子吸収性
能を効果的に発揮し得るアルミナ焼結ペレットを見い出
した。すなわち、本発明はＡｌ。O. By kneading alumina powder containing a predetermined amount of Gd with a suitable binder and forming it into a pellet, the Gd becomes GdA1O. We have discovered alumina sintered pellets that are uniformly dispersed in the form of , have excellent dispersion filling properties into stainless steel pipes, and can effectively exhibit neutron absorption performance. That is, the present invention uses Al.
Ｏ。を主成分とし、Ｇｄ。Ｏ。を０．０５〜５０重量％
含有してなる中性子吸収用アルミナ焼結ペレットである
。本発明においてＧｄ、Ｏｓの含有量を上記範囲に限定
した理由はその含有量を０．０５重量％未満にすると、
中性子吸収性を充分発揮できず、かといつて５腫量％を
越えると焼結性に悪影響を及ほ七、原子炉等での使用に
耐え得る２０００に９／Ｃｄ以上の曲げ強さが得られず
、かつＧｄ２Ｏ３が均一分散した所定形状のアルミナ焼
結ペレットが得られなくなる。O. The main component is Gd. O. 0.05-50% by weight
This is a sintered alumina pellet for neutron absorption containing. The reason why the content of Gd and Os is limited to the above range in the present invention is that if the content is less than 0.05% by weight,
It is difficult to exhibit sufficient neutron absorption properties, and if the volume exceeds 5%, the sinterability is adversely affected. Moreover, it becomes impossible to obtain alumina sintered pellets of a predetermined shape in which Gd2O3 is uniformly dispersed.
なお、本発明においては製造時の焼結性を高めるために
Ａｌ。Ｏ。粉末、Ｇｄ。Ｏ。粉末中にＭｇＯ等の焼結促
進剤を配合してもよい。次に、本発明の実施例を説明す
る。In addition, in the present invention, Al is used to improve sinterability during manufacturing. O. Powder, Gd. O. A sintering accelerator such as MgO may be added to the powder. Next, examples of the present invention will be described.
実施例１〜６及び比較例
下記表に示す成分組成の異なる７種の原料粉をポットミ
ルにて湿式粉砕して各成分を均一に分散”させた後乾燥
して平均粒径１．５〜１．７μｍの粉体を造つた。Examples 1 to 6 and Comparative Examples Seven types of raw material powders with different component compositions shown in the table below are wet-pulverized in a pot mill to uniformly disperse each component, and then dried to obtain an average particle size of 1.5 to 1. .7 μm powder was produced.
つづいて、これら粉体にメチルセルローズ水溶液を夫々
加えライカ機等て混練した後、ステンレスメッシュを通
して造粒粉を調製した。Subsequently, an aqueous methylcellulose solution was added to each of these powders, and the mixture was kneaded using a Leica machine or the like, and then passed through a stainless steel mesh to prepare granulated powder.
次いで、これら造粒粉を成形して３φ順×３ｍｎ〜１０
φ瓢×５ｗｒｍ形状のペレットとし、更に電気炉内で１
７０００Ｃ前後て焼成して７種のアルミナ焼結ペレット
を得た。得られた各アルミナ焼結ペレットの物性を調べ
た。Next, these granulated powders are molded into 3φ order x 3mm to 10
φ gourd x 5wrm shaped pellets, and further in an electric furnace
Seven types of alumina sintered pellets were obtained by firing at around 7000C. The physical properties of each of the obtained sintered alumina pellets were investigated.
その結果を同表に併記した。また、実施例１〜６の各ア
ルミナ焼結ペレットをＸ線マイクロアナラアザーで回折
したところ、アルミナ粒界にＧｄＡＩＯ３相が形成され
αがペレット中に均一に分散していることがわかつた。
しかして、得られた各アルミナ焼結ペレットをステンレ
スバイブに充填して中性子吸収部材として用いたところ
、該バイブに各ペレットが良好に最密充填され、かつ個
々のペレット自体のＧｄ２Ｏ３の均一分散性が良好なた
めに、バイブ全体にわたつて所期目的の中性子吸収性能
を有することがわかつた。The results are also listed in the same table. Further, when each of the sintered alumina pellets of Examples 1 to 6 was diffracted using an X-ray microanalyzer, it was found that a GdAIO3 phase was formed at the alumina grain boundaries and α was uniformly dispersed in the pellet.
When each of the obtained alumina sintered pellets was filled into a stainless steel vibrator and used as a neutron absorbing member, it was found that the vibrator was well packed with each pellet close-packed, and the individual pellets themselves had uniform dispersion of Gd2O3. was found to have the desired neutron absorption performance throughout the entire vibrator.
以上詳述した如く、本発明によればαが
ＧｄＡｌＯ３の形で均一かつ安定的に分散され、かつス
テンレスバイブへの最密充填性に優れ、中性子吸収性能
を効果的に発揮し得る中性子吸収用アルミナ焼結ペレッ
トを提供できるものである。As described in detail above, according to the present invention, α is uniformly and stably dispersed in the form of GdAlO3, and the stainless steel vibrator has excellent close-packing property and can effectively exhibit neutron absorption performance. It can provide sintered alumina pellets.
Claims (1)
．０５〜５０重量％含有してなる中性子吸収用アルミナ
焼結ペレット。1 Al_2O_3 is the main component, Gd_2O_3 is 0
．． Neutron absorbing alumina sintered pellets containing 05 to 50% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55110580A JPS6055460B2 (en) | 1980-08-12 | 1980-08-12 | Alumina sintered pellets for neutron absorption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55110580A JPS6055460B2 (en) | 1980-08-12 | 1980-08-12 | Alumina sintered pellets for neutron absorption |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5738367A JPS5738367A (en) | 1982-03-03 |
| JPS6055460B2 true JPS6055460B2 (en) | 1985-12-05 |
Family
ID=14539436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55110580A Expired JPS6055460B2 (en) | 1980-08-12 | 1980-08-12 | Alumina sintered pellets for neutron absorption |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6055460B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2584852B1 (en) * | 1985-07-11 | 1987-10-16 | Montupet Fonderies | NUCLEAR RADIATION ABSORBER |
-
1980
- 1980-08-12 JP JP55110580A patent/JPS6055460B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5738367A (en) | 1982-03-03 |
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