興和縣錦華石墨有限責任公司

可膨脹石墨是經過特殊的化學或電化學法制備而成的石墨層間化合物(GIC)，再經過中和、洗滌和干燥而得到。可膨脹石墨在高溫條件下其體積可以膨脹150-350倍，形成蠕狀石墨。這種蠕狀石墨結構疏松、易滲透、變形和互相嵌入，且表面積增大、表面能量和吸附力增強。這樣，它的柔韌性，彈性和可塑性都大大增強。不過不同的生產工藝和方法所制備的可膨脹石墨由于其顆粒大小、膨脹體積、初始膨脹溫度、碳含量和揮發物等的不同其性質有所差異，用途也有所不同，但基本都是各種柔性石墨制品的優質原材料。我們所生產的可膨脹石墨可專業應用到如下領域：

1. 可膨脹石墨主要用作中間產物。在烤爐中用1000℃高溫膨脹之后，就可以得到膨脹石墨。它可用于制造石墨片和石墨密封圈，一種工業上重要的密封材料。它具有耐熱、耐火、抗腐蝕和強化學品的性能，是目前市場上應用最為廣泛的密封材料。(見圖示1)

圖示1            圖示2           圖示3          圖示4           圖示5

2. 可膨脹石墨越來越多地用作防火間隔材料和阻燃劑，以及在塑料、泡沫和木制產品、原子灰和涂料中作為防火添加劑。當可膨脹石墨暴露在高溫條件下時，會形成一層不可燃燒的石墨焦絕熱層，使得它能夠在建材工業中滿足日益嚴峻的防火安全法規。(見圖示2-3)

3. 用可膨脹石墨制做而成的柔性石墨紙結合了其本身的柔性和重量輕的特性可以大大改善熱量的傳導性能。柔性石墨技術用于熱量傳導是通過石墨晶格結構提供的唯一各向異性實現的。局部使用柔性石墨紙可以達到快速傳導熱量的目的，從而達到快速局部散熱冷卻的作用 (例如下圖示6筆記本計算機外殼上使用的柔性石墨紙就是起到快速傳遞出熱量的設計)。

 (圖示6)

Jin Hua Graphite (Xinghe Inner Mongolia) Co., Ltd. is located in one of the main production base of natural crystalline graphite flake in Huangtuyao Village, Xinghe County, Inner Mongolia of China. The company focus on the production of stable quality expandable graphite , high purity graphite, micro powder of graphite and manufactured products of graphite depending on the advantaged resource conditions of natural crystalline graphite flake, the introduction of advanced domestic and foreign equipment for laboratory and production line and advanced production technology and green environmental protection of process flow, the introduction of excellent talent with professional knowledge and R&D experience of flake graphite in deep processing. The company with complete and scientific quality management system is a modern manufacturer of professional production and processing expandable graphite, high purity graphite and graphite powder. Its integrity, strength and product quality obtain industry acceptance. Welcome friends from all fields come to visit, give some advice and enter into business negotiation.

Expandable graphite is a graphite intercalation compound (GIC). The expandable graphite can be made through chemical method or electrochemical method to prepare GIC. After reaction, neutralizing, washing and drying are necessary. The expandable graphite can be expanded 150-350 times in volume instantaneously under high temperature during treatment, and become vermiform graphite which is loose, porous, curved, mutually inlaid in structure with large surface area, high surface energy and strong adsorptive power. In this way, its flexibility, resilience and plasticity are increased. However, different production flow and methods to prepare expandable graphite due to its particle size, expanded volume, onset expansion temperature, carbon content and volatile results in different physical and chemical properties and application range, but basically it is high quality raw material of all kinds of flexible graphite products. Our expandable graphite can be applied to the following areas:

1. Expandable graphite was mainly used as an intermediate. After expansion at 1000°C in oven, we get expanded graphite which could be used to make graphite sheet and graphite packing -- an important sealing material in industry. Its resistance to heat, fire, corrosion and aggressive chemicals make it the most universally applicable sealing solution on the market today.

2. Expandable graphite has been used by more and more amount as fire barrier material ,flame retardants and fire-retardant additive in plastics, foams, wood products, putties and coatings. Expandable Graphite forms such an insulating, non-burnable graphite char upon exposure to high temperatures that it enables the building products industry to meet increasingly stringent fire safety codes.

3. The flexible graphite paper made by expandable graphite offer a unique combination of flexibility, weight savings and performance improvement to the thermal conductivity. Use flexible graphite technology for thermal conductivity by leveraging the unique anisotropic properties offered by the graphite crystal structure. It leads thermal conductivity at a fraction of the weight to cool high power components (e.g. laptop casing as below)

4. Because free energy from between expandable graphite layer during reaction can be changed into electric energy, expandable graphite can be used as fuel cell material, normally expandable graphite as cathode, lithium as anode; or expandable graphite combined with silver oxide as cathode, zinc as the anode. Graphite fluoride, graphite acid, expandable graphite with AuCl₃ , TiF₄ , metal halide have been applied to the battery.

At present, the company is supplying a large number of expandable graphite with 50 mesh (270 micron) and 80 mesh (180 micron), carbon content between 95% and 99%. Expandable graphite can be also customed according to the different needs of customers and different production flow. Welcome domestic and foreign customers contact us by E-mail and telephone call.