Kaolin is one of the ingredients 用于陶瓷, paint, 橡胶, 纸张 and many other products. Although it has plenty of use, not many people know exactly what it is and why it is used in a lot of products. This article will discuss everything about kaolin and kaolin 325 mesh as well as its use in a variety of industries.

高岭土325目是什么意思？

Kaolin, also commonly called 瓷土, is a soft white clay that is usually used in manufacturing porcelain, paint, rubber, paper, and a lot more. Its name is derived from the name of a hill in China called Kao-ling, the place where this material was mined for centuries. 

Mesh is the old imperial standard measuring system used to measure particle size. This measuring system is still widely used to this day for mineral measurement in countries such as 中国 和 印度. The higher the number of the mesh size means the smaller the particles. 

From the two definitions above, kaolin 325 mesh is a type of kaolin with the size of 325 mesh or equal to 45 microns. This means that most of the particles of the materials are less than 45 microns. It is one of the international standards commonly used among a variety of kaolin users in various industries. 

高岭土的性质

Kaolin is naturally white, yellowish or greyish in color. It is soft, and powdery, which mostly consists of a mineral called kaolinite. However, it also contains other various types of minerals such as quartz, 长石, 莫斯科人, 和 anatase. or 

This material is usually odorless and is insoluble in water. When it is wet, however, kaolin will be darkened and develop an earthy odor.  While it is usually white in nature, crude kaolin often has a yellow stain due to iron hydroxide pigments. 

淡黄色高岭土通常经过漂白，以化学方式去除铁色素。在商业使用之前，它也在水中洗涤以去除其他矿物，以获得纯高岭土矿物。 

When it is mixed with water under 20 to 35 percent, kaolin becomes plastic and can be molded under pressure. However, the amount of water needed to create the plasticity and viscosity varied depending on the kaolinite particle’s size and other chemicals found in it. 

煅烧高岭土与水洗高岭土

工业中使用的高岭土通常经过煅烧或煅烧 水洗. 煅烧后，原始土壤发生变化并形成晶体。同时，水洗高岭土意味着仅对其进行物理处理，不会改变其原始土壤性质。此外，轻烧后，高岭土将变得越来越白。然而，经过水洗处理的高岭土不会明显变白。 

煅烧至一定温度后的高岭土可在造纸工业中用作添加剂和耐火骨料。同时，水洗高岭土通常用作造纸工业的填料。然而，在造纸工业中煅烧通常具有较好的白度，但成本较高。 

高岭土的使用

如前所述，高岭土325目常用于从造纸、涂料到陶瓷制造的各个行业。以下是该矿物在上述行业中的使用方式：

1.油漆和涂料

这种材料具有高折射率，结构为六方晶体。这是高岭土具有优异的遮盖力和颜色回报的原因之一。它还创造了这些产品的平衡流动性和流平性。由于其扁平颗粒，它还将提供巨大的压缩附着力。

由于这种矿物是亲水性的，这意味着使用高岭土的涂料将很容易扩散，并提供优异的悬浮性能。同时，它还具有较强的化学惰性，较小的光轴角和较高的晶体形状顺序。这三种特性的结合使得使用高岭土作为成分的涂料具有很强的防紫外线能力。

相关的： 所有你需要知道的关于高岭土作为油漆和涂料

2.釉料和陶瓷

在釉料制造中，高岭土被用来生产玻璃材料。Al2O3-2SiO2-2H20是形成玻璃体材料的理想配方。这个公式类似于大理石、石英和长石，它们是玻璃形成的主要成分。

这种白色矿物主要由Al2O3和少量二氧化硅组成。随着氧化铝用量的增加，釉料的粘度也会提高。这可防止粘附在玻璃上的釉料流动，同时影响玻璃的扩散。这使得结晶更难产生。

3.造纸工业

高岭土是造纸、橡胶、陶瓷、涂料、化工、医药等众多行业的必要原料。原因在于纯高岭土的高白度、柔软度、易分散、悬浮于水中、附着力高、可塑性好、电绝缘性能好。

高岭土是造纸、橡胶、陶瓷、涂料、化工、医药等众多行业的必要原料。原因在于纯高岭土的高白度、柔软度、易分散、悬浮于水中、附着力高、可塑性好、电绝缘性能好。

4.橡胶工业 

对于该行业而言，所使用的高岭土矿物是通过洗涤和精炼工艺生产的优质原矿。它具有较小的粒径和较低的水分。它还具有稳定的PH值和优良的DPG吸收性。 

鉴于上述特点，用精制高岭土制成的橡胶通常具有较低的耐磨性、良好的强度和良好的弯曲性能。它也是橡胶制品的优良填料。

5.医疗行业

最后但并非最不重要的是医疗行业。在医学领域,， 这种矿物质用于治疗轻度至中度腹泻、严重腹泻和霍乱。当与其他成分结合使用时，这种矿物质还可以治疗口腔内的疼痛和肿胀，并缓解由于放射治疗而引起的口腔内肿胀。 

325号高岭土网是工业用高岭土或瓷土的常用计量单位。它的特性允许广泛的用途。经过精心准备，这种材料甚至可用于医药。这意味着这种矿物通常是无毒的。但是，在处理这种材料时，请记得穿防护服和戴口罩。