霞石正长岩的开发和应用

霞石正长岩是一种新型节能陶瓷原料。用它代替长石制备坯釉料，可成功烧制日用陶瓷、美术瓷、卫生瓷、外墙砖、釉面砖产品。精选后的尾砂可生产彩色釉面砖，具有广泛的开发应用前景。     

霞石正长岩的开发和应用

霞石正长岩是一种新型节能陶瓷原料。用它代替长石制备坯釉料,可成功烧制日用细瓷、美术瓷、卫生瓷、外墙砖、釉面砖产品。精选后的尾砂可生产彩色釉面砖,具有广泛的开发应用前景。     

澳洲锂辉石在卫生洁具坯体中的应用

由最轻、最小、活性最强的碱金属元素组成的矿物原料———锂辉石 ,是一种极具潜力的陶瓷原料添加剂。Ｇｗａｌｉａ公司最近完成了一项研究项目 ,目的在于用数据确定添加氧化锂对普通卫生洁具坯料物化性能的影响。坯料配方见表 1。表 1　普通洁具坯料 (干重量百分比 )1 #瓷坯 2 #瓷坯 3#瓷坯球土 2 4 52 4 52 4 5瓷土 32 7 32 7 32 7石英 2 6 52 6 52 6 5霞石正长岩 /长石 1 2 2 1 0 69 0锂辉石 4 1 5 7 7 3　　表 1所列 3种坯料配方中 ,助熔成分总量控制在1 6 3% ,而加入的锂辉石分别占助熔成分的 2 5 %、35 %、45 %。锂辉石与霞…     

浅析钠长石在日用陶瓷中的应用

本文分析了钠长石能在日用瓷中应用的理论依据,证明钠长石引入瓷坯后可增加液相SiO2含量,降低瓷坯瓷化强度,且在成瓷强度下具备抗变形能力。||关键词##4钠长石;;长石质日用瓷;;低温烧成     

坯料组成与瓷坯力学性能关系的研究

以长石质瓷为对象，分别研究了坯料的化学矿物组成和颗粒组成的变化与瓷坯抗折强度的关系，利用XRD、SEM等分析手段，探讨了坯料组成及生产工艺制度对瓷坯的岩相组成、显微结构、力学性能的影响。     

利用硼泥制备低膨胀系数镁橄榄石瓷

以硼泥为主要原料,经干压成型后于1100~1260℃烧结保温3 h,得到镁橄榄石瓷。为改善镁橄榄石陶瓷的热膨胀性,实验探究了外加5~20%的β-锂霞石,对镁橄榄石瓷热膨胀系数的影响。通过对样品的X射线衍射分析和热膨胀测试,结果表明,添加一定比例的β-锂霞石能有效降低镁橄榄石瓷的热膨胀系数,当β-锂霞石含量达到20%时,在室温至800℃时测得镁橄榄石瓷的热膨胀系数随温度的升高而升高,最大热膨胀系数为8.071×10-6℃-1,相对于单纯的镁橄榄石瓷降低了26.2%。     

陶瓷矿物原料——石英

四、石英的鉴定方法在陶瓷工业中,某些瓷坯的配方是直接从石英原料中引进石英,如长石质瓷、骨灰瓷。但是有些瓷坯的配方,则是从瓷石中引进石英,如绢云母质瓷。此外,高岭土、膨润土、长石等原料中也常常含有石英,这些原料中的石英常呈微细颗粒存在。因此,除肉眼识别外,还需采用一些专门的方法。     

瓷坯内部包囊缺陷初探

一、瓷坯内部的一种气孔——包囊早些时候,人们对瓷坯结构的认识是以偏光显微镜和透射式显微镜对一些截面进行观察为根据,结合陶瓷器在高温下进行的物理、化学反应的一般规律,逐步形成瓷坯是由结晶相、玻璃相和气孔组成的这么一个概念。陶瓷工作者也习惯运用这一概念,以理解成瓷过程和判断制品的性能。以长石为熔剂的瓷坯的研究,给这个概念描绘了一幅具体的图象。稍后,对标准配方(高岭土50,长石及石英各25),并在特定的条件下烧成的瓷坯,使用X射线仪和扫描电镜进行研究,得出的瓷坯结构的图象就更为详细了。在这些图象中,气孔被看成是较简单的空心体。     

南江霞石替代长石在瓷砖应用的可行性研究

本文主要研究了纯霞石和霞石与石英混合料的烧结性能特点。另外也分析了霞石替代长石对试样烧结性能和瓷砖的抗折强度的影响。结果表明：[1]霞石烧结温度高于长石。[2]加入一定量的石英对霞石烧结性能有显著的影响。[3]霞石替代长石不仅降低瓷砖烧成温度,对瓷砖抗折强度也有明显的改善。     

硼锆瓷——一种新型低温烧成瓷

瓷大体上可分为硬质瓷和软质瓷。这两种瓷用的基本原料都是高岭土、长石和石英。传统硬质瓷的配方为:50％高岭土、25％长石和25％石英。经1350—1460℃烧成后,瓷坯的玻璃相量约为65％、吸水率0—0.2％、密度2.3—2.4g/cm~3。软质瓷的配方不同于     

废瓷粉在釉料中的应用

本文对陶瓷工业中的废瓷处理进行了一系列的釉料配方对比试验。通过对比试验发现:在釉料配方中引入一定量的废瓷粉取代长石等釉用原料,可以提高釉面质量及产品良品率。     

Use of khakass feldspar in production of ceramic tiles

The use of feldspar rock (orthophyre) and feldspar wastes of the Molibden Joint Stock Company (stripping pegmatites and tails resulting from ore concentration) in ceramic mixture compositions is investigated. The dependence of sintering and phase formation on the type and quantity of the feldspar component and the amount of cullet in the mixture is established. A diagram for selection of ceramic mixture compositions with the required sintering degree is developed. The properties and phase composition of tiles with the optimum amount of the feldspar components are studied. Translated from Steklo i Keramika, No. 2, pp. 7 – 9, February, 1999.     

On the determination of free silica in ceramic raw materials

The accurate quantitative determination of free quartz contained in local feldspars and clays was achieved through special methods of differential thermal analysis, and chemical analysis. and chemical analysis. Aswan feldspar and Aswan clays were found to contain varying free quartz contents and were therefore considered as suitable sources of raw materials for the preparation of clay-feldspar-quartz ceramic body mixes. Accordingly, no quartz addition was necessary for the production of pottery and porcelain ceramic bodies.     

珍珠岩成矿及在陶瓷中的应用与成瓷机理

珍珠岩(Perlite)系一种具有珍珠结构的酸性火山玻璃质熔岩，为典型的酸性岩浆喷出岩。多呈针状、球状雏晶结构、块状构造。由于其独特的物理化学性质，可用于制作日用陶瓷、建筑卫生陶瓷，部分替代高岭土、长石等原料。笔者分析讨论了珍珠岩在陶瓷坯体中的作用机理，希望能够对开发珍珠岩陶瓷制品提供依据和帮助。     

Properties of Triaxial Porcelain Bodies: Interpretation of Statistical Modeling

The effect of raw materials type and content on the properties of clay–feldspar–quartz compositions was studied using the statistical design of mixture experiments. Based on wall and floor tile industrial practice, 10 mixtures of three raw materials were selected and processed. Characterization results were used to calculate statistically significant and valid regression equations, relating fired body properties with clay, feldspar, and quartz contents in the unfired mixture. Such statistical modeling is discussed against quantitative X-ray diffraction and scanning electron microscopy results. The glassy phase present was found to control the microstructure and the mechanical strength of the fired ceramic body.     

THE CAPILLARY SUCTION OF SOME CERAMIC MATERIALS1

The forces which act when clay is mixed with water and when water is removed from wet clay by evaporation have received little study. For this reason, very little definite information regarding the internal mechanism of the drying of clayware is available. In this paper, the writer reviews the experiments and theories of Pukall, Terzaghi, Dixon, etc., lists some of the forces which may act when ware is drying, and defines an important force which he calls “capillary suction.” A simple experiment is described, by means of which this force can be readily demonstrated. The development and final form of an apparatus for measuring the capillary suction of ceramic materials is described and data obtained from measurements on a ball clay, a kaolin, flint, feldspar and mixtures of these substances are reported. Capillary suction decreases rapidly with increase in the flint and feldspar of a ceramic body. By utilizing the capillary suction produced by evaporation of water from a clay surface, water at atmospheric pressure has been made to enter a steel bomb in which the gas pressure was maintained at 200 lbs. per square inch.     

AUXILIARY FLUXES IN CERAMIC BODIES1

Twenty-five synthetic fluxes composed of ceramic materials, compounded in their eutectic proportions and fused to clear glasses, were added to a body of the semivitreous type in varying amounts, and their effect on vitrification was studied. It has been found possible to reduce the feldspar content of such a body to 8% and, by an addition of 2% of auxiliary glass, to develop almost any desired degree of body vitrification between 0.5 and 7.0% at a temperature as low as cone 6.     

金矿尾砂代替长石用于陶瓷墙地砖的研究

主要研究金尾矿中影响金矿尾砂代替长石作陶瓷墙地砖原料的主要因素－－Ｆｅ质。Ｃｌ对陶瓷墙地砖生产工艺及产品质量的影响;分析了产生影响的机理,讨论金矿尾矿砂除铁脱Ｃｌ的方法及工艺;确定了金尾矿代替长石作陶瓷墙地砖原料的加工工艺及有前的性能要求。     

Technological behavior of porcelain stoneware bodies with Egyptian syenites

The progressive depletion of the main feldspathic flux deposits in the World is forcing the ceramic industry to search for suitable substitutes. The aim of this study is to assess the potential of some feldspar sources in the Egyptian Eastern Desert, particularly syenites from Abu Khruq, in the manufacture of ceramic tiles. Beneficiated samples obtained by laboratory-scale mineral processing were tested into porcelain stoneware batches (from 10% to 30% wt in replacement of feldspars) and compared with a reference body through a laboratory reproduction of the industrial processing. The technological behavior of unfired tiles does not suffer any significant alteration due to the use of syenites. On the other hand, syenite-bearing bodies exhibit some changes in the phase composition and the chemistry of the melt, that turns richer in alkali, especially K₂O. The consequently increased sintering rate depends mainly on the viscosity of the liquid phase formed during firing. In conclusion, syenites can be used without technological hindrances to manufacture porcelain stoneware tiles. The firing behavior of syenite-bearing batches can be reasonably adjusted by setting key parameters (eg, the feldspar amount and the Na/K ratio), but the darker color of fired bodies requires to further lower the iron oxide.     

Regional microstructural characteristics between the body and glaze of ancient Chinese ceramics

Anorthite crystallization between the body and glaze of ancient ceramics has regional characteristics. According to the microstructural characteristics of the body and glaze, ancient Chinese ceramics can be mainly divided into four types: Yue kiln type, Longquan kiln type, Ding kiln type and Changsha kiln type. Anorthite crystallization is closely related to the elemental composition of the body and glaze. The microstructure of Minhou kiln ceramic chips shows that when the Al₂O₃ content of the body is high, fine feldspar crystals precipitated into the layer of molten glaze in contact with the body surface during firing. This unique microstructure can help identify some ceramics.