Graphite material and a method of producing graphite material
AssigneeIbiden Co., Ltd.
InventorsToshiyuki Nishiwaki, Masahiro Yasuda, Toshiki Ito
Life of this patent
Estimating the term…
Abstract
A graphite material includes a plurality of graphite particles and a plurality of pores which form a microstructure. When a cross-section of the microstructure is observed with a scanning electron microscope, the number of the pores appearing on the cross-section is more than 250 or more per 6000 μm2, an average area of the pores appearing on the cross-section is 5 μm2 or less, and an average aspect ratio of the pores appearing on the cross-section is 0.55 or less.
Claims19
A graphite material comprising:
- a plurality of graphite particles;
- and
- a plurality of pores,
- wherein the plurality of graphite particles and the plurality of pores form a microstructure, and
- wherein a cross-section of the microstructure has a number of the pores that is 250 or more per 6000 μm2, an average area of the pores on the cross-section is 5 μm2 or less, and an average aspect ratio of the pores on the cross-section is 0.55 or less.
A graphite material comprising:
- a plurality of graphite particles;
- and
- a plurality of pores,
- wherein the plurality of graphite particles and the plurality of pores form a microstructure,
- wherein a cross-section of the microstructure has a number of the pores that is 250 or more per 6000 μm2, an average area of the pores on the cross-section is 5 μm2 or less, and an average aspect ratio of the pores on the cross-section is 0.55 or less,
- wherein said graphite material has a bulk density of from 1.78 to 1.86 g/cm3,
- wherein a maximum long axis of the pores is 20 μm or less,
- wherein said graphite material has a shore hardness of from 55 to 80, and
- wherein said graphite material has an electric resistance of from 1000 to 2300 μΩcm.
An elastic body made of a graphite material, the graphite material comprising:
- a plurality of graphite particles;
- and
- a plurality of pores,
- wherein the plurality of graphite particles and the plurality of pores form a microstructure, and
- wherein a cross-section of the microstructure has a number of the pores that is 250 or more per 6000 μm2, an average area of the pores on the cross-section is 5 μm2 or less, and an average aspect ratio of the pores on the cross-section is 0.55 or less.
A method for producing an elastic body, the method comprising:
- producing a cylindrical base material with using a graphite material, the graphite material comprising:
- a plurality of graphite particles;
- and a plurality of pores, wherein the plurality of graphite particles and the plurality of pores form a microstructure, and wherein a cross-section of the microstructure has a number of the pores that is 250 or more per 6000 μm2, an average area of the pores on the cross-section is 5 μm2 or less, and an average aspect ratio of the pores on the cross-section is 0.55 or less;
- obtaining a workpiece by fixing a columnar body to an inner periphery of the cylindrical base material with an adhesive;
- relatively displacing a cutting tool in parallel to a center axis of the cylindrical base material while rotating the workpiece about the center axis to cut the cylindrical base material with a spiral groove which reaches the columnar body;
- heating the workpiece cut with the spiral groove to depolymerize the adhesive;
- and
- removing the columnar body from the cylindrical base material.
Dependencies are inferred from the claim text.