
A special agitator shaft with symmetrically arranged agitator pegs and sleeves of tungsten carbide for wear protection devel- Vertical, batch operation mill for the preparation of tungsten Ideal flow behaviour due to a special agitator peg arrange-ment and the hemispherically shaped chamber floor integrated screen plate for grinding media separationIntensive cooling through a double-wall grinding tank and cooled circulation pipeline

Product inlet via rotor / immersion tube system prevents back flow of grinding media into the feed line.

Generally, there are two ways to obtain nano-powders. A bottom-up manufacturing method (bottom up) for chemical methods, such as chemical precipitation, sol-gel process (sol-gel),... Another method is physical method, which changes the powder particles from big to small (top down), such as mechanical ball milling,... And so on.

The Development In 1963, the first vertical agitator was developed internationally, the first horizontal agitator was developed in 1975, the first horizontal agitator bead mill with eccentric disks was introduced to the public and the horizontal disc grinder was introduced, in 2004, which became the industry standard. In the following years, the grinding media separation systems, the geometry of the grinding disks and the various grinding chamber materials were further developed.

The grinding system pin nanomill shows the evolutionary develop- ment of system with the rotor-slotted pipe separating system. The enclosed horizontal agitator mill is designed for highest product throughput rates and possesses a pin grinding system for highest grinding intensity.

In 2011, we developed the first zirconia comminution chamber technology in China. It has no metal ion pollution and is used in batteries, pharmaceuticals, glazes, ink and food.

石墨烯防腐涂料利用石墨烯獨(dú)特的二維片層結(jié)構(gòu)、優(yōu)異的阻隔性、化學(xué)惰性和機(jī)械強(qiáng)度,為以金屬基材為主的表面提供了前所未有的高效、長效防護(hù)。因以往在分散性、成本和標(biāo)準(zhǔn)等方面仍面臨成本挑戰(zhàn),但其顯著的性能優(yōu)勢(shì)使其在重防腐領(lǐng)域展現(xiàn)出巨大的應(yīng)用潛力和市場前景。隨著技術(shù)的不斷突破和成本的持續(xù)下降,石墨烯防腐涂料有望逐步替代傳統(tǒng)防腐涂料,成為未來防腐工程的主力軍。
主要有以下幾個(gè)方面的因素
二維片層結(jié)構(gòu): 石墨烯是由單層碳原子以sp²雜化形成的蜂窩狀二維晶體。這種結(jié)構(gòu)使其能以超薄的片層形式分散在涂料中。
迷宮效應(yīng): 當(dāng)石墨烯片層均勻、平行地分散在涂層中時(shí),它們會(huì)形成復(fù)雜曲折的路徑。水分子、氧氣、氯離子等腐蝕介質(zhì)需要繞過這些片層才能到達(dá)金屬基材表面,極大地延長了滲透路徑,有效阻隔了腐蝕因子的侵入。這是石墨烯提升防腐性能的核心機(jī)制之一。
優(yōu)異的化學(xué)惰性:石墨烯本身化學(xué)性質(zhì)非常穩(wěn)定,耐酸、堿、鹽等腐蝕介質(zhì),為涂層提供了額外的化學(xué)保護(hù)屏障。
良好的導(dǎo)電性:石墨烯是已知導(dǎo)電性最好的材料之一。
在防腐涂料中:陰極保護(hù): 當(dāng)與鋅粉等活性金屬粉末結(jié)合使用時(shí),石墨烯可以形成高效的導(dǎo)電網(wǎng)絡(luò),使鋅粉能更有效地作為犧牲陽極,為鋼鐵基材提供陰極保護(hù),大幅提升富鋅涂料的性能。
靜電消散: 在需要防靜電的場合,石墨烯的導(dǎo)電性有助于防止靜電積聚。
極高的機(jī)械強(qiáng)度和柔韌性:
石墨烯具有極高的強(qiáng)度和模量。將其加入涂層可以:增強(qiáng)涂層機(jī)械性能: 提高涂層的硬度、耐磨性、抗沖擊性和附著力。
改善涂層柔韌性: 有助于減少涂層在形變或溫度變化時(shí)的開裂風(fēng)險(xiǎn),保持涂層的完整性。
而石墨烯的制備中一個(gè)重要的環(huán)節(jié),需要用到砂磨機(jī),納米級(jí)別,將石墨剝離到2-10nm,3-5層,才能將石墨烯的功能和作用發(fā)揮出來。