Overview
Kaolin, commonly known as china clay, is a naturally occurring hydrated aluminum silicate mineral. It is formed by the weathering of feldspathic rocks over millions of years. The name 'kaolin' originates from the Chinese term 'Gaoling,' meaning 'high ridge,' where it was first mined. Kaolin is prized for its whiteness, fine particle size, and chemical stability. It is chemically inert, non-abrasive, and has low conductivity, making it suitable for a wide range of industrial applications. The mineral is extensively used in the paper, ceramics, rubber, and cosmetics industries due to its unique properties.
Physical and Chemical Properties
Kaolin is characterized by its white to off-white color and fine, plate-like particle structure. It has a density of approximately 2.6 g/cm³ and a melting point around 1750°C. The mineral is insoluble in water and most organic solvents, making it highly stable under various conditions. Key properties of kaolin include its high brightness, plasticity, and low abrasiveness. These attributes make it an ideal filler and coating material in multiple industries. Its chemical composition, primarily aluminum silicate, ensures it remains inert and non-reactive in most applications.
Main Applications
Kaolin is widely used in the paper industry as a coating and filler to improve gloss, opacity, and printability. In ceramics, it serves as a key ingredient in porcelain and sanitary ware due to its plasticity and firing properties. The rubber industry utilizes kaolin as a reinforcing filler to enhance tensile strength and abrasion resistance. Additionally, kaolin is used in paints, adhesives, and sealants to improve viscosity and durability. In cosmetics and pharmaceuticals, it acts as an absorbent and texturizing agent. Its versatility and safety profile make it a preferred choice across diverse sectors.
Safety and Storage
Kaolin is generally considered non-toxic and safe for handling. However, prolonged inhalation of dust particles may cause respiratory irritation. It is advisable to use personal protective equipment, such as masks and gloves, when handling large quantities. Storage conditions for kaolin should be dry and cool to prevent moisture absorption, which can affect its performance. Properly sealed containers or bags are recommended to maintain product quality. Kaolin is not classified as hazardous, but standard industrial safety practices should be followed.
B2B Procurement Guide
When procuring kaolin for industrial use, buyers should prioritize purity, particle size distribution, and moisture content. These factors significantly influence the material's performance in specific applications. It is essential to request technical data sheets and certificates of analysis from suppliers. Price varies based on grade and purity, with refined kaolin commanding higher prices. Bulk purchases often attract discounts, but storage capacity and shelf life should be considered. Establishing long-term relationships with reputable suppliers ensures consistent quality and reliable supply chains.
Related Manufacturers
- 主营：石英砂、麦饭石、无烟煤滤料、粉煤灰、鹅卵石、石灰石、蛭石、过滤滤材、火山石、叶腊石
- 主营：天然鹅卵石、雨花石、彩色石子、重钙粉、蛭石、营养土、火山石、黑色金刚砂、地坪五彩石、变压器鹅卵石、鹅卵石滤料、水处理鹅卵石、分目烘干砂、石英砂、黑白石英砂
- 主营：硅藻土、膨润土、高岭土、超细硅酸铝粉、滑石粉、透明粉、木粉、玻璃粉、贝壳粉、电气石粉、赤铁粉、彩砂、白炭黑、金刚砂、石墨、海泡石、轻钙、重钙、凹凸棒土、玻璃鳞片、陶土、铝矾土、火山岩、合成云母
- 主营：海泡石、矿物纤维、绿沸石、滑石粉、石英粉、云母粉、木粉、绿沸石粉、蛭石、金刚砂、膨润土、硅灰、核桃壳粒、小石子、云母片、增碳剂、珍珠岩、玻璃纤维、漂珠、石棉绒、绿沸石颗粒、木质纤维、膨胀珍珠岩颗粒、云母矿、石英砂
- 主营：烘干机拖轮、造粒机、打散机、粉碎机、粉土机、粉碎机筛板、粉碎机锤头、球磨机钢锻、烘干机托辊、制砂机衬板、废水回收机、球磨机钢球、挤压制粒机、污水处理设备、煤棒机、制棒机、破碎机锤头、破碎机衬板、球磨机衬板、高锰钢锤头、耐磨锤头、高铬合金锤头、破碎机筛板、制砂机锤头
- 主营：乳化硅油、化妆品添加物、聚二甲基硅氧烷、有机硅粉体、硅胶硅油混合物
- 主营：高效粉料压片、造粒机、旋转闪蒸干燥机
- 主营：穩泡剂、洁模剂、乳化剂、粉未涂料、防沉剂、固化剂、除固剂、tpr树脂、消臭剂、聚丙烯、pua树脂、疏水剂、dow醇醚、热锈宝、脱模剂、粘着剂、膨润土、清洗剂、eva乳液、脱泡剂、聚氨酯、防锈剂、弹性剂、催干剂、乳化型fc、抗静电剂
- 主营：矿源黄腐酸钾、木质素磺酸钠、木质素磺酸钙、氨基酸原粉、大苏打、腐殖酸钠、工业葡萄糖、工业白糖、工业红糖、黄腐酸钾、大蒜油、高铁酸钾、海藻精、过硫酸氢钾、腐植酸钠、氨氮去除剂、小苏打、鱼蛋白、EM菌
- 主营：石英砂、无烟煤、活性炭、堇青石粉、萤石粉、沸石、火山石、增碳剂、活性白土、硅藻土、高纯石英砂、椰壳活性炭、无烟煤滤料、煅烧高岭土、沸石颗粒、火山石颗粒、工业硅藻土、漂白土、米白圆粒沙、五彩玉石米、五彩玉石、硅酸铝纤维、重钙、轻钙
- 主营：石墨、膨胀石墨、云母、导电石墨粉、防静电墨粉、阻燃石墨粉、鳞片石墨粉、超细石墨粉、云母粉、电气石粉、云母片、茶色云母片、电气石、电气石颗粒、天然云母片、透明云母片、导热石墨、绝缘云母片、耐高温云母、云母板、岩片、贝壳片、膨润土、钙基膨润土、纳基膨润土
- 主营：685增稠粉、次氯酸钠、水净化活性炭、685增稠剂
- 主营：水玻璃、工业级甲醛、次氯酸钠、漂白粉、氨水、二氯甲烷、磷酸、冰醋酸、二甲基甲酰胺、甲酸、苯酚、片碱、液碱、多聚甲醛、硫酸铜、铬酸酐、过碳酸钠、蒸馏水、软水盐、草酸、速溶硅酸钠、碳酸二甲酯、三氯乙烯、EDTA二钠、大苏打
- 主营：滑石粉、重钙粉、石英砂、雪花白砂
- 主营：鱼缸砂、夜光石、路面石、荧光粉、火山石、鹅卵石、雨花石、洗米石、水洗石、机制石子、水磨石子、胶粘石、石英砂、烘干砂、保温砂、砂浆砂、金刚砂、白沙子、蛭石、天然彩砂、染色彩砂、金刚砂地坪料、透水石子、水刷石石子