ISSN:0371-750X    

DOI:10.1080/0371750X.1969.10855674

出版商:Taylor & Francis    

年代:1969

数据来源: Taylor

ISSN:0371-750X    

DOI:10.1080/0371750X.1969.10855675

出版商:Taylor & Francis    

年代:1969

数据来源: Taylor

摘要:

Three glass compositions, one corresponding to β-Eucryptite, another corresponding to Lithium Metasilicate and the third corresponding to 1070°C eutectic on the lithium metasilicate-β-eucryptite join in the composition triangle lithium metasilicate-β-spodumene-β-eucryptite of the system Li2O-Al2O3-SiO2 were studied with respect to their crystallization behaviour. The phases crystallizing out after different heat treatment schedules and using different nucleating agents were identified by X-ray diffraction patterns. In all cases, the initial crystallization product was Eucryptite silica-O form. However, in the case of 1070°C eutectic composition the development of lithium metasilicate phase was also noticed after heat treating at 800°C for 5 hours.

ISSN:0371-750X    

DOI:10.1080/0371750X.1969.10855671

出版商:Taylor & Francis    

年代:1969

数据来源: Taylor

ISSN:0371-750X    

DOI:10.1080/0371750X.1969.10855676

出版商:Taylor & Francis    

年代:1969

数据来源: Taylor

摘要:

Physico-chemical properties of some Indian bentonites were systematically studied in view of their wide application in recent years in ceramic industries as plasticizer, in glazes etc. The study includes the general properties of bentonites e.g. colour, fracture, sp. gr., hardness, plasticity, pH, sp conductivity, particle size, soapy touch, swelling, thixotropy and settling behaviour. The bentonites studied were Bihar, Jaipur, Akli, Hathi-ki-dhani, Rajula and Karauli. Of the bentonites studied Akli showed maximum fineness, swelling and dry linear shrinkage. Akli and Hati-ki-dhani appeared to be Na-based bentonite, and Bihar appeared to be a Ca-based. Jaipur and Karauli did not exhibit the characteristic properties of bentonite.

ISSN:0371-750X    

DOI:10.1080/0371750X.1969.10855672

出版商:Taylor & Francis    

年代:1969

数据来源: Taylor

摘要:

The influence of alkalies, alkaline earth oxides, Fe2O3and TiO2on mullitization of a pure kaolinitic clay was studied by quantitative X-ray diffraction measurements, using γ-alumina as the internal standard. Earlier investigations indicate that the yield of mullite varies, within wide limits, with the concentration of the mineralizers. The results show that the amounts in which these impurities are generally present in clays have profound influence on the process of mullitization.

ISSN:0371-750X    

DOI:10.1080/0371750X.1969.10855673

出版商:Taylor & Francis    

年代:1969

数据来源: Taylor