Resin composition for forming varistor and varistor
US-2021155769-A1 · May 27, 2021 · US
Porous carbon and resin composition
US12304818B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12304818-B2 |
| Application number | US-202017600870-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 13, 2020 |
| Priority date | Apr 4, 2019 |
| Publication date | May 20, 2025 |
| Grant date | May 20, 2025 |
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Abstract
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A porous carbon has an I D /I G of 2.0 or more in a Raman spectrum measured by Raman spectroscopy with respect to the porous carbon wherein the I G is an accumulated intensity of a peak for G band around 1590 cm −1 , and the I D is an accumulated intensity of a peak for D band around 1350 cm −1 . The porous carbon has pores having a size of less than 1 μm. The porous carbon can be contained in a resin composition for producing a varistor element.
First claim
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The invention claimed is: 1. A porous carbon, wherein the porous carbon has an I D /I G of 2.0 or more in a Raman spectrum measured by Raman spectroscopy with respect to the porous carbon, wherein the I G is an accumulated intensity of a peak for G band around 1590 cm −1 , and the I D is an accumulated intensity of a peak for D band around 1350 cm −1 , wherein the porous carbon has pores having a size of 200 nm or more and less than 1 μm, and wherein the porous carbon is porous carbon for a varistor element. 2. The porous carbon according to claim 1 , wherein the porous carbon has an M D /M G of 0.80 or more, wherein the M G is a maximum intensity of a peak for the G band, and the M D is a maximum intensity of a peak for the D band. 3. The porous carbon according to claim 1 , wherein a peak temperature of thermal decomposition when producing the porous carbon is 800 to 1500 degrees C. 4. The porous carbon according to claim 1 , wherein the porous carbon is produced by thermal decomposition of a mixture of raw materials containing furfural and phloroglucinol. 5. The porous carbon according to claim 4 , wherein an amount of the furfural in the raw materials is 100 to 500 parts by weight, relative to 100 parts by weight of the phloroglucinol. 6. The porous carbon according to claim 1 , wherein the porous carbon is produced by thermal decomposition of a raw material containing a polyimide. 7. A resin composition comprising the porous carbon according to claim 1 and a resin. 8. A porous carbon particle, wherein the porous carbon particle has an I D /I G of 2.0 or more in a Raman spectrum measured by Raman spectroscopy with respect to the porous carbon particle, wherein the I G is an accumulated intensity of a peak for G band around 1590 cm −1 , and the I D is an accumulated intensity of a peak for D band around 1350 cm −1 , wherein the porous carbon particle has pores having a size of 200 nm or more and less than 1 μm, and wherein a particle size of the porous carbon particle is in a range of 0.01 to 50 μm. 9. The porous carbon particle according to claim 8 , wherein the particle size of the porous carbon particle is in a range of 0.02 to 10 μm. 10. The porous carbon particle according to claim 8 , wherein the porous carbon particle has an M D /M G of 0.80 or more, wherein the M G is a maximum intensity of a peak for the G band, and the M D is a maximum intensity of a peak for the D band. 11. A resin composition comprising the porous carbon particle according to claim 8 and a resin.
Assignees
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Classifications
Varistor cores (H01C7/12 takes precedence) · CPC title
use in electrical or conductive gadgets · CPC title
Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title
Pore volume · CPC title
obtained by SEM · CPC title
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- What does patent US12304818B2 cover?
- A porous carbon has an I D /I G of 2.0 or more in a Raman spectrum measured by Raman spectroscopy with respect to the porous carbon wherein the I G is an accumulated intensity of a peak for G band around 1590 cm −1 , and the I D is an accumulated intensity of a peak for D band around 1350 cm −1 . The porous carbon has pores having a size of less than 1 μm. The porous carbon can be contained …
- Who is the assignee on this patent?
- Namics Corp
- What technology area does this patent fall under?
- Primary CPC classification C01B32/05. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 20 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).