DEVELOPMENT OF ELECTRICAL PORCELAIN INSULATORS FROM CERAMIC MINERALS IN UGANDA

机译：乌干达陶瓷矿物电瓷绝缘子的研制

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Characterisation studies on ceramic minerals in Uganda have revealed their possibility for application in ceramic insulator production. Sand, feldspar and clay were used to formulate porcelain bodies based on established theories for ensuring high dielectric and mechanical strength. Sintering profiles and their effects on strength, crystalline phase content and morphology were investigated using dilatometry, 4-point bending strength, XRD and FEG-SEM. Optimum properties of insulators from these minerals were attained with heating/cooling rates of 6℃/min to peak temperature of 1250℃ with dwell time of 2h. The quartz content of the sintered body decreased as peak temperature was increased beyond 1250℃ along with a decline in strength of the bodies. Neither increasing dwell time at 1250℃ nor reducing the heating/cooling rate to less than 6℃/min for a peak temperature of 1250℃ were shown to result in improvement of strength. The morphology of mullite crystals did not change with change in either heating/cooling rate or dwell time at peak temperature of 1250℃. The industrial sized specimens produced exhibited dry and wet flashover voltages of 22.8kV and 11.4kV respectively, transverse load capacity of 12.5kN and bulk density of 2.27g/cm~3. These are satisfactory for low voltage insulation applications.

机译：乌干达对陶瓷矿物的表征研究表明，它们有可能用于陶瓷绝缘子生产。沙，长石和粘土用于根据既定的理论来配制瓷体，以确保高介电强度和机械强度。使用膨胀计，四点弯曲强度，XRD和FEG-SEM研究了烧结曲线及其对强度，结晶相含量和形态的影响。通过以6℃/ min的加热/冷却速率至1250℃的峰值温度和2h的停留时间，可获得由这些矿物制成的绝缘子的最佳性能。随着峰值温度升高到超过1250℃，烧结体中的石英含量降低，并且强度降低。在1250℃的峰值温度下，增加保压时间或将加热/冷却速率降低到6℃/ min以下都不会导致强度的提高。在1250℃的峰值温度下，莫来石晶体的形态不随加热/冷却速率或停留时间的变化而变化。所生产的工业尺寸试样的干，闪络电压分别为22.8kV和11.4kV，横向负载能力为12.5kN，堆密度为2.27g / cm〜3。这些对于低压绝缘应用是令人满意的。

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《Mechanical properties and performance of engineering ceramics and composites IX》|2014年|115-125|共11页
会议地点 Daytona Beach FL(US)
作者
Peter W. Olupot; Stefan Jonsson; Joseph K. Byaruhanga;
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Department of Mechanical Engineering, Faculty of Technology, Makerere University, P.O. Box 7062, Kampala, Uganda;

Department of Material Science and Engineering, Royal Institute of Technology (KTH), Brinellvaegen 23, SE-100 44 Stockholm, Sweden;

Department of Mechanical Engineering, Faculty of Technology, Makerere University, P.O. Box 7062, Kampala, Uganda;

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1. Development and characterisation of triaxial electrical porcelains from Ugandan ceramic minerals [J] . Peter W. Olupot, Stefan Jonsson, Joseph K. Byaruhanga CERAMICS INTERNATIONAL . 2010,第4期

机译：用乌干达陶瓷矿物开发和表征三轴电瓷
2. Discussion on the papers ÃÂÃÂ¿The development of a pre-stressed (`toughenedÃÂÃÂ¿) glass insulatorÃÂÃÂ¿, by Mr. P.M. Hogg, and ÃÂÃÂ¿The performance of glass insulators, and comparisons with porcelainÃÂÃÂ¿, by the Electrical Research Association, before the Transmission Section, 10th April, 1940 [J] . Electrical Engineers, Journal of the Institution of . 1940,第528期

机译：P.M先生对论文ƒ的讨论of预应力（“ toughenedƒ”玻璃纤维绝缘子）的发展。 Hogg和ÃƒÂ‚¿玻璃绝缘子的性能，以及电气研究协会在1940年4月10日传输部分之前与瓷器的比较。
3. Study of Glazes and Their Effects on Properties of Triaxial Electrical Porcelains from Ugandan Minerals [J] . Peter W. Olupot, Stefan Jonsson, Joseph K. Byaruhanga Journal of Materials Engineering and Performance . 2010,第8期

机译：乌干达矿物釉料及其对三轴电瓷性能的影响
4. DEVELOPMENT OF ELECTRICAL PORCELAIN INSULATORS FROM CERAMIC MINERALS IN UGANDA [C] . Peter W. Olupot, Stefan Jonsson, Joseph K. Byaruhanga International conference on advanced ceramics and composites . 2015

机译：从乌干达陶瓷矿物的电气瓷绝缘子的开发
5. Bond strength between veneer porcelains and CAD/CAM ceramic to CP titanium and evaluation of fracture load and effect of aging on low fusing porcelain fired over CP Ti and CAD / CAM materials cemented onto CP Ti [D] . Hifeda, Nedda Y. 2016

机译：饰面瓷和CAD / CAM瓷之间对CP钛的粘结强度，以及在CP Ti上烧制的低熔瓷和粘结在CP Ti上的CAD / CAM材料对断裂载荷和时效的影响
6. Fabrication of electrical porcelain insulator from ceramic raw materials of Oromia region Ethiopia [O] . Andualem Merga, H.C.Ananda Murthy, Enyew Amare, 2019

机译：用埃塞俄比亚奥罗米亚地区的陶瓷原料制造电瓷绝缘子
7. Fabrication of electrical porcelain insulator from ceramic raw materials of Oromia region, Ethiopia [O] . Andualem Merga, H.C.Ananda Murthy, Enyew Amare, 2019

机译：埃塞俄比亚奥罗米亚地区陶瓷原料的制造

DEVELOPMENT OF ELECTRICAL PORCELAIN INSULATORS FROM CERAMIC MINERALS IN UGANDA

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