GRAPHITE SHEET AND METHOD FOR PRODUCING SAME

• Main Authors: KOBAYASHI MOTOAKI, KOJIMA MASAHIRO, INABA KEISUKE, NISHIKAWA YASUSHI
• Format: Patent
• Language: Chinese; English
• Published: 11.09.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOUNDS THEREOF; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL PROCESSES OF COMPOUNDING; INORGANIC CHEMISTRY; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; NON-METALLIC ELEMENTS; ORGANIC MACROMOLECULAR COMPOUNDS; SEMICONDUCTOR DEVICES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

Provided are: a graphite sheet having favorable heat diffusion properties and flexibility; and a method for producing the same. This method for producing a graphite sheet containing 0.01 to 1.10 wt% of phosphorus includes: a carbonization step in which a polyimide film having a phosphate content within a prescribed range is carbonized to obtain a carbonaceous film; and a graphitizing step in whichthe carbonaceous film is subjected to a heat treatment at a prescribed temperature increase rate and a maximum temperature of at least 2,600 deg C. 提供热扩散性及柔软性良好的石墨片及其制造方法。磷含量为0.01重量％以上且0.10重量％以下的石墨片的制造方法包括：碳化工序，通过使磷酸盐含量处于规定范围内的聚酰亚胺膜碳化来获得碳质膜；石墨化工序，以规定的升温速度且以2600℃以上的最高温度，对所述碳质膜进行热处理来获得石墨片。