JP2015218071A5 - - Google Patents
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- JP2015218071A5 JP2015218071A5 JP2014100426A JP2014100426A JP2015218071A5 JP 2015218071 A5 JP2015218071 A5 JP 2015218071A5 JP 2014100426 A JP2014100426 A JP 2014100426A JP 2014100426 A JP2014100426 A JP 2014100426A JP 2015218071 A5 JP2015218071 A5 JP 2015218071A5
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- JP
- Japan
- Prior art keywords
- circularity
- particles
- average
- area
- perimeter
- 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.)
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- 239000002245 particle Substances 0.000 description 6
- 229910052863 mullite Inorganic materials 0.000 description 2
- 239000000945 filler Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000005118 spray pyrolysis Methods 0.000 description 1
Description
本発明の微小ムライト中空粒子の形状は、図１及び図２から明らかなように、球状であり、平均円形度は０．８５以上である。このような形状は、噴霧熱分解法により製造することにより達成される。
ここで、円形度は、走査型電子顕微鏡写真から粒子の投影面積（Ａ）と周囲長（ＰＭ）を測定し、周囲長（ＰＭ）に対する真円の面積を（Ｂ）とすると、その粒子の円形度はＡ／Ｂとして表される。そこで、試料粒子の周囲長（ＰＭ）と同一の周囲長を持つ真円の周囲長および面積は、それぞれＰＭ＝２πｒ、Ｂ＝πｒ2であるから、Ｂ＝π×（ＰＭ／２π）2となり、この粒子の円形度は、円形度＝Ａ／Ｂ＝Ａ×４π／（ＰＭ）2として算出される。１００個の粒子について円形度を測定し、その平均値でもって平均円形度とする。なお、本発明の微小ムライト中空粒子は、各種フィラーとして混合したときの分散性、混合性など点から、平均円形度は、０．８５以上、好ましくは０．９０以上である。
As apparent from FIGS. 1 and 2, the shape of the micro mullite hollow particles of the present invention is spherical, and the average circularity is 0.85 or more. Such a shape is achieved by manufacturing by a spray pyrolysis method.
Here, the circularity is determined by measuring the projected area (A) and the perimeter (PM) of a particle from a scanning electron micrograph, and assuming that the area of a perfect circle with respect to the perimeter (PM) is (B). Circularity is expressed as A / B. Therefore, the circumference and area of a perfect circle having the same circumference as the sample particle (PM) are PM = 2πr and B = πr 2 , respectively, so that B = π × (PM / 2π) 2 . The circularity of the particles is calculated as circularity = A / B = A × 4π / (PM) 2 . The circularity is measured for 100 particles, and the average value is defined as the average circularity. The fine mullite hollow particles of the present invention have an average circularity of 0.85 or more, preferably 0.90 or more from the viewpoint of dispersibility and mixing properties when mixed as various fillers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014100426A JP6389373B2 (en) | 2014-05-14 | 2014-05-14 | Micro mullite hollow particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014100426A JP6389373B2 (en) | 2014-05-14 | 2014-05-14 | Micro mullite hollow particles |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2015218071A JP2015218071A (en) | 2015-12-07 |
| JP2015218071A5 true JP2015218071A5 (en) | 2017-05-25 |
| JP6389373B2 JP6389373B2 (en) | 2018-09-12 |
Family
ID=54777768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014100426A Active JP6389373B2 (en) | 2014-05-14 | 2014-05-14 | Micro mullite hollow particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6389373B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111943690B (en) * | 2020-08-17 | 2022-09-23 | 山西高速公路工程检测有限公司 | Mullite mixed powder, preparation method thereof and application thereof in 3D printing |
| CN114213017A (en) * | 2021-12-08 | 2022-03-22 | 西安赛尔电子材料科技有限公司 | Preparation method of glass sealing material containing hollow mullite microspheres |
| CN114634354B (en) * | 2022-03-15 | 2023-04-25 | 深圳市基克纳科技有限公司 | Method for improving comprehensive performance stability of porous ceramic atomizing core |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992009543A1 (en) * | 1990-12-03 | 1992-06-11 | Manville Corporation | Method of preparing ceramic hollow particles |
| JP2005089251A (en) * | 2003-09-18 | 2005-04-07 | Mitsui Chemicals Inc | Aluminum nitride granule, production method and application thereof |
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2014
- 2014-05-14 JP JP2014100426A patent/JP6389373B2/en active Active
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