Speciality Graphite, High Purity Graphite

Product Description

High Purity Isostatic Graphite Blocks and Columns
Isostatic graphite blocks and Columns are produced by the method of Cold Isostatic Pressing (CIP).
Graphite is isostatically pressed in a purpose of ensuring uniform properties in all grain directions.
Products are used in aerospace, military industry, nuclear industry, photovoltaics, hydrogen fuel cells, anode materials, semiconductors, machinery, mold industries and other industries, as well as in light industry, textiles, chemicals, daily necessities and many other scenarios.
In the index table, the larger the bulk density, compressive strength and flexural strength, the better, and the smaller the resistivity and ash content, the better.

High-purity Isostatic Graphite Reference Index 

Items	CG-4	CG-5	CG-6	CG-7	CG-8	CGR-5	CGR-7	CGR-8	BD900	BD950	BD960
Bulk density / g/cm³	1.75	1.85	1.90	1.82	1.90	1.68	1.85	1.90	1.85	1.85	1.79
Resistivity /μΩ·m	8~11	8~10	8~9	11~13	11~13	13~15	11~13	11~13	8~9	8~9	8~11
Thermal conductivity(100ºC)/ W/m·k	110~120	130~140	130~140	110~120	110~120	80~100	100~120	110~120	145	130	100
Thermal expansion coefficient (room temperature-600ºC)/10-6/ºC	5.46	4.75	4.8	5.8	5.85	5.8	5.9	5.85	4.2	4.1	4.9
Shore hardness /HSD	42	48	53	65	70	60	68	72	50	51	55
Flexural strength /Mpa	38	46	55	51	60	38	62	70	48	60	58
Compressive strength / Mpa	65	85	95	115	135	80	135	160	87	100	101
Elastic Modulus /Gpa	9	11.8	12	12	13	8.8	12	13
Porosity /%	17	13	11	12	11	18	12	11	13	13	14
Purified ash  /PPM	50	50	50	50	50	50	50	50	30	30	20
Graininess /μm	13~15	13~15	8~10	8~10	8~10	8~10	7	5
Recommended application areas	Universal	Universal	Continuous Casting Sintering Metallurgy	EDM Photovoltaic	EDM Photovoltaic Glass	EDM	Universal EDM	EDM Photovoltaic Glass	Semi conductor

Notes: Product Specification could be customized according to final application.





Available sizes of Isostatic Graphite Blocks and Columns

Sr.	Model	Size/mm	Weight/kg		Sr.	Model	Size/mm	Weight/kg
1	CG-4	550*410*250	115		24	CGR-8	550*410*250	121
2		650*530*250	169		25		650*530*250	180
3		940*320*270	160		26		940*320*320	191
4		940*320*320	183		27	CG-7	1050*600*310	430
5	CG-5	550*410*250	120		28		1080*350*350	240
6		650*530*250	172		29		1160*1160*270	695
7		940*320*320	192		30		1250*650*270	430
8	CG-6	550*410*210	105		31		1600*650*310	640
9		610*510*210	131		32		1850*600*340	730
10		660*210*150	45		33		2350*650*320	1150
11		660*210*210	61		34	CG-8	1250*650*270	470
12	CG-7	550*410*250	115		35	CG-5	φ560*520	285
13		650*530*210	137		36	CG-8	φ620*630	415
14		650*530*250	173		37	CG-7	φ700*700	540
15		940*320*320	186		38		φ840*750	830
16	CG-8	550*410*250	123		39		φ880*750	925
17		940*320*320	193		40		φ940*750	1030
18	CGR-5	550*410*250	110		41		φ940*850	1130
19		650*530*250	160		42		φ970*900	1345
20		940*320*320	175		43		φ1120*350	630
21	CGR-7	550*410*250	113		44		φ1120*1000	1860
22		650*530*250	170		45		φ1200*1000	2100
23		940*320*320	185		46		φ1350*1080	2650

* The figures above are typical values, and are not guaranteed.
* The measurement temperature range for the coefficient of thermal expansion is 350 to 450°C.
* Unit conversion: μΩ·m=μΩ·cm × 0.01 MPa=kgf/cm2 × 0.098 GPa=kgf/mm2 × 0.0098 W/(m·K)=kcal/h·m·°C × 1.16
* There are other product sizes in addition to those stated above. Contact us for details.


Isostatic graphite is an ultra-fine grain graphite used for applications where the mechanical properties of other fine grain graphites are inadequate.
The term "isostatic graphite" stands for isostatically molded graphite. This means that the raw material mixture is compressed into rectangular or round blocks in a so called Cold-Isostatic-Press.

Typical properties of isostatic graphite
Extremely high thermal and chemical resistance
Excellent thermal shock resistance
High electrical conductivity
High thermal conductivity
Increasing strength with rising temperature
Easy to machine
Can be produced with very high purity < 20 ppm