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fine porcelain
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  fine porcelain
At first, coarse wares were fired; then in the beginning of the 20th century, production of fine porcelain started.
      


Porcelain-grade Kaolin is widely distributed in China, and has a long history of exploitation and utilization. It occurs mainly in Suzhou, Jiepai, Daton, Chaozhou, and Jingdezhen. Research on the porcelain Kaolin of China in the past years shows that most of the Kaolins in the North China are of sedimentary type, and that the ore deposits of Kaolin occur in the coal-bearing strata of Paleozoic and Mesozoic age. The origin of Kaolins in the South China is related to acid igneous rocks, such as granite etc, and...

Porcelain-grade Kaolin is widely distributed in China, and has a long history of exploitation and utilization. It occurs mainly in Suzhou, Jiepai, Daton, Chaozhou, and Jingdezhen. Research on the porcelain Kaolin of China in the past years shows that most of the Kaolins in the North China are of sedimentary type, and that the ore deposits of Kaolin occur in the coal-bearing strata of Paleozoic and Mesozoic age. The origin of Kaolins in the South China is related to acid igneous rocks, such as granite etc, and most of them belong to weathering (residual) types, or to hydrothermal alteration types. The different geological conditions of ore-formation have resulted in a variation in mineral and chemical composition of the Kaolin, as woll as to difference in technological propcrties. The Chemical composition of Kaolin in Suzhou is close to the stoichiometrlc formula for standard Kaolinite. Its main mineral co mponents are Kaolinite, 7halloysite and 10halloysite. It has high plasticity and bonding proporties, and has high whiteness and refractoriness after burning. So it becomes an important raw material in the porcelain industry. The chemical composition of Kaolin in Jiopai is characterized by high SiO_2, low Al_2O_3 and Fe_2O_3, and little Na_2O and K_2O. It is mainly composed of poorly crystallized Kaolinite, 7 halloysite, muscovite, quartz and albite etc. It has a fine grain size and shows high whiteness and refractoriness after burning, and shrinkage is low. So it is a high-guality raw mateial preferred for the manufacture of fine porcelain table-wares. The chemical composition of Kaolin in Datong is similar to the composition of Suzhou kaolin. Its main mineral component is Kaolinite. Owing to the presence of an organic matter impurity. The Datong Kaolin has high plasticity and better shaping properties after ball-milling. The Kaolin in Feitienyan (Chaozhou) has high SiO_2, low Al_2O_3 and the K_2O is higher than in other Kaolin. Its principal minerals are illite and Kaolinite. It has moderate plasticity, and whiteness can rise to 70-80% reflectivity after burning. So it can be used directly in manufacturing porcelain. The chemical composition of Kaolin in Jingdezhen is characterized by high SiO_2 and Fe_2O_3, low Al_2O_3. After washing Al_2O_3 can increase to 34—36%. Its main minerals are Kaolinite and 7 halloysite.

我国制瓷高岭土分布广泛,开采历史悠久。其主要产区是江苏苏州、湖南界牌、山西大同、广东潮州和江西景德镇。近年来对制瓷高岭土的研究表明,我国北方所产高岭土多属沉积型,矿床赋存于古生代及中生代煤系地层内。南方所产高岭土在成因上则与花岗岩等酸性火成岩有关,多属风化残积型与热液蚀变型。各地高岭土由于成矿地质条件的差别,导致矿石的矿物、化学成分和工艺性能的差别。苏州高岭土的化学成分接近于标准高岭石的理论成分,它的主要矿物成分是高岭石、7多水高岭石和10多水高岭石,特高可塑性和结合性能,焙烧后白度高,耐火度亦高,所以它是制瓷工业重要原料。界牌高岭土的化学成分具征是SiO_2含量高,Al_2O_3、Fe_2O_3含量低,并含少量Na_2和K_2O,它主要由结晶差高岭石、7多水高岭石、白云母、石英和钠长石等组成,其工艺性能特征是细颗粒含量高、焙烧后白度高、耐火度高,但收缩小,因此是制造高档日用细瓷的优质原料。大同高岭土是一种硬质高岭土,其化学成分类似于苏州高岭土,主要矿物成分是高岭石,由于有机质的存在,球磨后具可塑性和成形性能。潮州飞天燕高岭土的化学成分特征是SiO_2高、Al_2O_3低,K_2O比一般高岭土高,它的主...

我国制瓷高岭土分布广泛,开采历史悠久。其主要产区是江苏苏州、湖南界牌、山西大同、广东潮州和江西景德镇。近年来对制瓷高岭土的研究表明,我国北方所产高岭土多属沉积型,矿床赋存于古生代及中生代煤系地层内。南方所产高岭土在成因上则与花岗岩等酸性火成岩有关,多属风化残积型与热液蚀变型。各地高岭土由于成矿地质条件的差别,导致矿石的矿物、化学成分和工艺性能的差别。苏州高岭土的化学成分接近于标准高岭石的理论成分,它的主要矿物成分是高岭石、7多水高岭石和10多水高岭石,特高可塑性和结合性能,焙烧后白度高,耐火度亦高,所以它是制瓷工业重要原料。界牌高岭土的化学成分具征是SiO_2含量高,Al_2O_3、Fe_2O_3含量低,并含少量Na_2和K_2O,它主要由结晶差高岭石、7多水高岭石、白云母、石英和钠长石等组成,其工艺性能特征是细颗粒含量高、焙烧后白度高、耐火度高,但收缩小,因此是制造高档日用细瓷的优质原料。大同高岭土是一种硬质高岭土,其化学成分类似于苏州高岭土,主要矿物成分是高岭石,由于有机质的存在,球磨后具可塑性和成形性能。潮州飞天燕高岭土的化学成分特征是SiO_2高、Al_2O_3低,K_2O比一般高岭土高,它的主要矿物成分是伊利石和高岭石,可塑性中等,焙烧后的白度能达到70—80度,因此可直接用于制瓷。景德镇高岭土的化学成分特征是SiO_2和Fe_2O_3含较高,淘洗后Al_2O_3含量能提高到34—36%,其主要矿物成分是高岭石和7多水高岭石。

Up to now, Kaolin is still the raw material for the making of household fine porcelain. In this paper,

高岭土历来是制作日用瓷的粘土原料。本文是从地开石矿的特性、机理研究入手,通过试验研究,用地开石矿取代高岭土以制作日用细瓷,并获成功。

The process of developing high-grade household fine porcelain was narrated indetail, and the introduced range of Junkou clay─26~34 % was defined. The technica1 characreris-tics of product have increased to some extent.

详细叙述了用均口土研制高级口用细瓷器的过程,确定了均口土的引入范围─—26~34%.产品的各项技术指标均有所提高。

 
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