JP7325543B2 - セラミック接合体、セラミック接合体の製造方法、流路切替弁用ステータおよび流路切替弁 - Google Patents
セラミック接合体、セラミック接合体の製造方法、流路切替弁用ステータおよび流路切替弁 Download PDFInfo
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Description
セラミック接合体は、例えば、CIE1976L*a*b*色空間における明度指数L*が83以上87以下、クロマティクネス指数a*が-1.5以上1.5以下およびクロマティクネス指数b*が-2.0以上3.0以下の白色を示す表面を有することができる。表面の明度指数L*、クロマティクネス指数a*およびクロマティクネス指数b*がこの範囲であると、流体に含まれる暗色系の汚れが表面に固着しても視認が容易になり、部品交換を適切な頻度で行うことができる。
表面のCIE1976L*a*b*色空間における明度指数L*の値,クロマティクネス指数a*およびクロマティクネス指数b*の値は、JIS Z 8722:2000に準拠して測定すればよい。例えば、色彩色差計(旧ミノルタ社(製)CR-221)を用い、基準光源をD65、照明受光方式を条件a((45-n)〔45-0〕)、測定径を3mmとして測定することができる。十分な測定径を確保することができない場合には、任意の場所を研磨加工した後に、前述の条件に設定して測定すればよい。
第1部材1および第2部材2の少なくともいずれかは、Fe、CrおよびNiの少なくともいずれかを含み、それぞれの部材における前記金属の含有量の合計が25質量ppm以上100質量ppm以下であるとよい。
Fe、CrおよびNiの少なくともいずれかを含み、それぞれの部材における前記金属の含有量の合計が25質量ppm以上であれば、各部材の脱鉄工程における、これら強磁性金属の除去が容易である。Fe、CrおよびNiの含有量の合計が100質量ppm以下であると、第1部材1と第2部材2との接合工程で、第1対向面1bと第2対向面2bとの間に、これら金属が流出するおそれが低くなり、両者の接合強度をより高くすることができる。セラミック接合体のも表面にも局部的な色調異常が発生しにくくなる。
少なくともいずれかの表面は、可視光線に対する全反射率が80%以上であってもよい。
可視光線に対する全反射率が80%以上であると、程良い明るさを有する清潔感溢れる白色とすることができるので、流体に含まれる暗色系の汚れが表面に固着しても視認がより容易になり、部品交換に対する感度を向上させることができる。
本開示における可視光線とは、360nm~740nmの波長の光線をいう。
全反射率については、分光測色計(コニカミノルタ社(製)CM-3700d等)を用い、基準光源をD65、波長範囲を360nm~740nm,視野角を10°とし、測定径が25.4mmで照明径が28mmとなるマスク(LAV)を用いて、JIS Z 8722:2000に準拠して測定することができる。
第1流路1aを形成する第1内壁面1cにおける開気孔の最大径は6μm以下であってもよい。
開気孔の最大径を求める場合、まず、金属顕微鏡を用いて第1内壁面1cの表面を100倍の倍率で撮影する。次に、この撮影した写真をCCDカメラで画像化し、この画像における9×10-2mm2内の開気孔を観察して、最も大きな開気孔の外径を画像から算出する。そして、これを1視野として他の観察部位を含め計10視野観察し、この10視野の観察結果から、最も大きな開気孔の外径を開気孔の最大径とすればよい。
2 第2部材
3 ステータ
4 ロータ
5 シャフト
6 ロータ保持部
7 枠体
8 弾性部材
9 軸受
10 ボルト
11 配管
20 流路切替弁
Claims (13)
- 流体を送液するための第1流路を有するセラミックスからなる第1部材と、前記第1流路に接続して前記流体を送液するための第2流路を有するセラミックスからなる第2部材とを備えてなるセラミック接合体であって、前記セラミックスは、酸化ジルコニウムおよび酸化アルミニウムを含み、その少なくともいずれかを主成分とし、前記第2部材に対向する前記第1部材の第1対向面と、前記第1部材に対向する前記第2部材の第2対向面とは拡散接合しているセラミック接合体。
- ZrのZrO2換算値とAlのAl2O3換算値との合計が前記セラミックスを構成する全成分100質量%のうち80質量%以上であり、前記ZrO2換算値と前記Al2O3換算値との質量比が97~50:3~50である、請求項1に記載のセラミック接合体。
- 第1部材および第2部材の少なくともいずれかは、Fe、CrおよびNiの少なくともいずれかを含み、それぞれの部材における前記Fe、CrおよびNiの少なくともいずれかの含有量の合計が25質量ppm以上100質量ppm以下である請求項2に記載のセラミック接合体。
- 少なくともいずれか表面のCIE1976L*a*b*色空間における明度指数L*が83以上87以下であり、クロマティクネス指数a*が-1.5以上1.5以下およびクロマティクネス指数b*が-2.0以上3.0以下である、請求項1から3のいずれかに記載のセラミック接合体。
- 少なくともいずれかの表面は、可視光線に対する全反射率が80%以上である、請求項1から4のいずれかに記載のセラミック接合体。
- 前記第1流路を形成する第1内壁面は研磨面である、請求項1から5のいずれかに記載のセラミック接合体。
- 前記第1流路を形成する第1内壁面は、粗さ曲線における算術平均粗さ(Ra)が0.2μm以下である、請求項1から6のいずれかに記載のセラミック接合体。
- 前記第1流路を形成する第1内壁面は、粗さ曲線における25%の負荷長さ率での切断レベルと、前記粗さ曲線における75%の負荷長さ率での切断レベルとの差を表す、切断レベル差(Rδc)が0.3μm以下である、請求項1から7のいずれかに記載のセラミック接合体。
- 前記第1流路を形成する第1内壁面における開気孔の最大径は6μm以下である、請求項1から8のいずれかに記載のセラミック接合体。
- 前記第2流路を形成する第2内壁面は焼成面である、請求項1から9のいずれかに記載のセラミック接合体。
- 流体を送液するための第1流路を有するセラミックスからなる第1部材と、前記第1流路に接続して前記流体を送液するための第2流路を有するセラミックスからなる第2部材とを備えているセラミック接合体の製造方法であって、いずれも焼成する前の前記第1部材の前駆体である第1成形体および前記第2部材の前駆体である第2成形体を連通するピン挿入孔を複数形成する工程と、前記第1部材および前記第2部材を焼成する工程と、前記第2部材に対向する前記第1部材の第1対向面と前記第1部材に対向する前記第2部材の第2対向面とを吸着させる工程と、前記ピン挿入孔に位置決めをするためのピンを挿入する工程と、吸着させた後に前記第1部材および前記第2部材を厚み方向から押圧して熱処理する工程とを有する、セラミック接合体の製造方法。
- 請求項1から10のいずれかに記載のセラミック接合体を用いてなる、ステータ。
- 請求項12に記載のステータと、該ステータと接触しながら回転して流路を切り替えるロータとを備えてなる流路切替弁。
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| WO2019044906A1 (ja) | 2017-08-29 | 2019-03-07 | 京セラ株式会社 | セラミック接合体およびその製造方法 |
| WO2019124779A1 (ko) | 2017-12-19 | 2019-06-27 | 주식회사 티씨케이 | 유체 흐름이 가능한 유로가 형성된 접합 세라믹 및 이의 제조방법 |
| JP2019172528A (ja) | 2018-03-29 | 2019-10-10 | 京セラ株式会社 | セラミック結合体および炭素繊維製造装置用断熱部材 |
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| JP2803111B2 (ja) * | 1988-11-18 | 1998-09-24 | スズキ株式会社 | セラミックスの接合方法 |
| JP2748494B2 (ja) * | 1989-02-13 | 1998-05-06 | スズキ株式会社 | セラミックスの複合方法 |
| JP2002012470A (ja) * | 2000-06-23 | 2002-01-15 | Ngk Spark Plug Co Ltd | 高純度アルミナ焼結体、高純度アルミナボール、半導体用治具、絶縁碍子、ボールベアリング、チェックバルブ及び高純度アルミナ焼結体の製造方法 |
| JP3528045B2 (ja) * | 2000-07-31 | 2004-05-17 | 株式会社村田製作所 | 積層セラミック電子部品の製造装置 |
| EP1999465B1 (en) * | 2006-03-24 | 2016-11-16 | Waters Technologies Corporation | Ceramic-based chromatography apparatus |
| CN101896750A (zh) | 2008-02-14 | 2010-11-24 | 株式会社岛津制作所 | 流路切换阀 |
| US8629592B2 (en) * | 2009-06-25 | 2014-01-14 | General Electric Company | Hermetic sealing assembly and electrical device including the same |
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