FIRING BEHAVIOUR OF CERAMIC WHITEWARE BODIES INCORPORATED WITH LOCAL FELDSPATHIC SOURCES
FIRING BEHAVIOUR OF CERAMIC WHITEWARE BODIES INCORPORATED WITH LOCAL FELDSPATHIC SOURCES
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含有当地长石源的陶瓷坯体的烧制行为
DOI：
10.11113/jt.v78.9757
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Mahizar Mohamad
中科院分区：
文献类型：
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作者：
R. Othman;Mahizar Mohamad
采石场粉尘是花岗岩采石活动的副产品。花岗岩碎块通常是从特定采石场的花岗岩岩石爆破中获得的，经过许多减小破碎孔径大小的机器，并随后进行筛分，以获得所需尺寸的花岗岩集料，通常为20毫米、10毫米等。这些将用于建筑物的建造，作为混凝土混合物中的粗集料，以及沥青道路的铺设。根据采石公司的做法，最细的部分通常在7毫米或5毫米以下，通常在现场倾倒。它被认为是一种需要处理的废物。除了解决环境问题外，在开发新产品时再使用这些废料将是一个有吸引力的商业主张。在这项工作中，花岗岩采石场粉尘被加入到粘土基陶瓷体中，以取代长石（一种昂贵的成分）作为这种三轴粘土白器组合物的助熔剂。助熔剂是首先熔化的陶瓷体组合物中的组分，其作用是将所有其他固体颗粒结合在一起形成刚体。最初，采石场粉尘在与粘土以固定的45:55重量比混合之前进行化学和矿物学表征。然后将混合物压紧并在不同温度下烧制，然后测试烧制产品的性能。并与瓜木山当地的长石源进行了比较，以确定这种替代方法生产高质量陶瓷体的可行性。在矿物学上，与瓜木山长石中的钠长石（钠长石）相比，花岗岩采石场粉尘主要由钾长石（或正长石）组成。这导致前者在较低的温度下熔化，但表现出更粘稠的熔体。与此同时，花岗岩采石场粉尘中较高的铁含量导致了烧制时身体的颜色要深得多。总之，与瓜木山长石相比，花岗岩采石场粉尘成功地降低了陶瓷体的成熟温度，并在较宽的烧成温度下保持了低孔隙率的稳定性。
Quarry dust is a by-product of granite quarrying activities. Granite fragments, that are normally obtained from blasting granite rocks in a particular quarry, are subjected to a number of machineries of decreasing crushing aperture sizes and each attendant sieving to obtain granite aggregates of the desired size, normally 20 mm, 10 mm, etc. These are to be used in the construction of buildings as coarse aggregates in concrete mixes, as well as in the laying of tarred roads. The finest fraction, nominally below 7 mm or 5 mm in size depending on the practice of the quarrying company, is normally dumped on site. It is considered to be a waste that needs to be disposed of. Apart from attending to the environmental issue, the reuse of such waste material in the development of new products would be an attractive commercial proposition. In this work, granite quarry dust was incorporated into a clay-based ceramic body to replace the use of feldspar (an expensive component) as the fluxing agent in such triaxial clay whiteware compositions. A fluxing agent is the component in a ceramic body composition that melts first and functions as the component that binds together all the other solid particles into a rigid body. Initially, the quarry dust was chemically and mineralogically characterized before mixing with clay at a fixed 45:55 weight ratio. The mixtures were then pressed and fired at various temperatures before testing the properties of the fired products. A comparison was made with a local feldspathic source from Gua Musang to ascertain the feasibility of such replacement to produce high quality ceramic bodies. It was found that mineralogically the granite quarry dust consists of K-feldspar (or orthoclase) as compared to Na-feldspar (or albite) found in the Gua Musang feldspar. This led to melting at a lower temperature of the former but exhibited a much more viscous melt. At the same time, the higher iron content in the granite quarry dust led to a much darker colourisation of the body upon firing. In conclusion, the granite quarry dust has been found to be successful in lowering the maturing temperature of ceramic bodies compared to the Gua Musang feldspar beside conferring stability of the low porosity property over a wider firing temperature.