排序方式: 共有23条查询结果,搜索用时 15 毫秒
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任军荣 《河南科技学院学报》2002,30(3):10-12
缺硼土壤种植油菜时施用高效速溶硼肥比施用硼砂可显著增强油菜生长势、优化产量结构、改良油菜籽品质,增产1.71%~10.6%;比不施硼极显著增产,增幅达21.17%~26.04%.高效速溶硼肥的三种施用方式即基施+喷施、基施、喷施肥效差异不显著.从生态效益和经济效益综合分析、以苔期喷施0.15%的高效速溶硼肥效果较好. 相似文献
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有媒体曝光了一些沙琪玛中使用硼砂的"黑幕",再次引发了公众对于"食品添加剂"的关注。其实,在东南亚和中国一些地区,把硼砂添加到食物中有着相当久远的历史。有位美国人曾经在网上发问,说他的太太来自台湾,做米粉的时候会加入一些奇怪的原料,比如硼砂。他想知道硼砂究竟是什么东西, 相似文献
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水合乙酸钠相变蓄热研究 总被引:20,自引:0,他引:20
研究了水合乙酸钠相变蓄热的性能,硼砂对过冷现象有明显的抑制,CMC、聚丙烯酰胺等对分相现象有明显的抑制。 相似文献
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通过实验,研究了硼砂在聚乙稀醇类粘合剂中的作用,对聚乙烯醇中硼砂的用量进行了探索,并结合仿瓷涂料胶和地板胶等实例进行了研究。 相似文献
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Preparation of high performance ceramic tiles using waste tile granules and ceramic polishing powder 总被引:1,自引:0,他引:1
This paper presents an innovative approach to reusing waste tile granules (TG) and ceramic polishing powder (PP) to produce high performance ceramic tiles. We studied formulations each with a TG mass fraction of 25.0% and a different PP mass fraction between 1.0% and 7.0%. The formulations included a small amount of borax additive of a mass fracton between 0.2% and 1.2%. The effects of these industrial by-products on compressive strength, water absorption and microstructure of the new ceramic tiles were investigated. The results indicate that the compressive strength decreases and water absorption increases when TG with a mass fraction of 25.0% are added. Improvement of the compressive strength may be achieved when TG (up to 25.0%) and PP (up to 2.0%) are both used at the same time. In particular, the compressive strength improvement can be maximized and water absorption reduced when a borax additive of up to 0.5% is used as a flux. Scanning electron microscopy reveals that a certain amount of fine PP granules and a high content of fluxing oxides from borax avail the formation of glassy phase that fills up the pores in the new ceramic tiles, resulting in a dense product with high compressive strength and low water absorption. 相似文献
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欧·亨利 《阅读与作文(高中版)》2012,(3):26-27
马莎·米查姆小姐是街角上那家小面包店的女老板(那种店铺门口有三级台阶,你推门进去时,门上的小铃就会丁零丁零响起来)。马莎小姐今年四十岁了,她有两千元的银行存款、两枚假牙和一颗多情的心。结过婚的女人可不少,但同马莎小姐一比,她们的条件可差远啦。 相似文献
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由液态烧碱代替纯碱,利用原有纯碱的生产工艺改为烧碱制取硼砂工艺,该工艺除部分参数和个别辅助设备更改外,基本保持原有的工艺条件。 相似文献