泡沫陶瓷过滤板过滤机制和选择

简要介绍了铝熔体净化用泡沫陶瓷过滤板的结构、过滤机理以及选择过滤板的原则，对使用者评价和选择泡沫陶瓷过滤板有一定的参考价值。     

电磁场净化铝熔体试验研究

采用行波磁场净化技术研究了在铝熔体深度净化方面的效果,并与陶瓷泡沫过滤技术的效果进行了工业对比试验,结果表明在铝熔体的净化深度和净化效率方面,行波磁场净化技术优于泡沫陶瓷过滤技术.     

铝及铝合金熔体复合净化装置

本实用新型为一种铝及铝合金熔体复合净化装置，主要包括导流装置、过滤净化装置、气体介质净化装置、净化室、放流装置和炉体支撑装置。过滤净化装置由三块泡沫陶瓷过滤板和两层熔剂过滤层组成，在隔墙的底部与炉体之间的通道中设置泡沫陶瓷过滤板，前后净化室的上部均设置泡沫陶瓷过滤板，     

一种铝合金铸造用泡沫陶瓷过滤板的试制和应用

对泡沫陶瓷过滤板的过滤机理及其研制和应用进行了详细的阐述，给出生产工艺流程及焙烧工艺，经实验研究和应用实践，产品质量基本过关。此陶瓷过滤板具有生产工艺简单，成本低等特点，并具备生产的条件。     

泡沫陶瓷过滤板的研制

以自产氧化铝为主要原料，氢氧化铝为粘结剂合成原料，研制开发了用于铝液过滤净化的泡沫陶瓷过滤板。通过确定合理的配比和工艺，制品的各项物化性能皆达到应用要求，年可节约费用100万元。     

铝熔体双级保温过滤箱的研制

过滤是去除铝熔体内非金属夹杂的有效手段,使用１１．８孔／ｃｍ的泡沫陶瓷过滤板,夹杂去除率低,已不能满足罐料,ＰＳ版板基,铝箔,航空制品等高质量产品对夹杂含量的要求。为此,研制了一种双级保温过滤箱,采用电加热方式,可同时使用两块细孔过滤板进行双级过滤,生产实践证明,１１．８孔／ｃｍ＋１９．７孔／ｃｍ过滤板可连续过滤７炉以上;     

过滤金属液用的泡沫陶瓷过滤器

本专利提供一种过滤金属液用耐高温泡沫陶瓷过滤器的组成及其制造工艺。该泡沫陶瓷过滤器主要由粉料和液料等两部分组成,其中粉料有（wt％）：人工合成刚玉35．2～52．8,     

液体金属过滤用陶瓷过滤装置

欧洲专利 EPl940532 本专利涉及一种过滤净化液体金属的陶瓷过滤装置，它由以陶瓷相为基体和少量碳化物相组成，粘结剂选用磷酸盐化合物。陶瓷相包括氧化铝、氧化锆、硅酸锆、氧化硅和氧化镁等，最好选用电熔棕刚玉。粘结剂磷酸盐的加入量为5％。而碳质材料一般加入量为7％～8％，而且陶瓷材料中最好加入纤维材料，如氧化铝纤维、氧化硅纤维、碳纤维等。     

147铝合金过滤净化研究(上)

对经刚玉陶瓷管和泡沫陶瓷板过滤和未过滤的147铝合金(美国2219)铸锭和挤压带材(CS状态)平面应变断裂韧性测试、定量金相显微镜和扫描电镜观察,结果表明,过滤净化可以减少147铝合金中的氧化物含量、细化第二相质点及疏松尺寸;提高147铝合金铸锭断裂韧性13.2％、挤压带材断裂韧性8％。经过滤和未过滤的147合金无论铸锭或挤压制品的断裂韧性试样断口,在宏观上都呈脆性断裂,微观上为穿晶微孔聚合型断裂。过滤不改变断裂机制,但经过滤净化后的试样断口,基体塑性区变大,裂纹失稳前吸收的能量增加。最终表现为过滤净化提高了材料的断裂韧性。     

多孔陶瓷过滤制品渗透率的研究

渗透率是多孔陶瓷过滤制品的一个重要性能,直接关系到制品的结构和使用性能.以不同形状不同材料多孔陶瓷过滤试样为例,研究了其渗透率的评定方法,讨论了渗透率与厚度的关系,提出了在评定渗透率时应注意的问题.     

微波消解-硫酸亚铁铵滴定法测定钴铬烤瓷合金中铬

钴铬烤瓷合金作为齿科最常用的材料之一,尚无对应的检测标准,国内外相关的检测标准及论文报道较少,而铬作为钴铬烤瓷合金的主要成分,迫切需要开发其检测方法进而为生产、使用和贸易等方面带来重要的指导作用。采用10mL盐酸、3mL硝酸和2mL氢氟酸对样品进行微波消解,然后在硫磷混酸介质中,以硝酸银溶液作为催化剂,用过硫酸铵溶液将样品溶液中的铬(Ⅲ)氧化成铬(VI),加入硫酸锰溶液,当Mn²⁺被氧化至出现紫红色时,即可判断铬已被氧化完全,锰同时被氧化为高锰酸。加入少量氯化钠溶液并煮沸以破坏高锰酸,以苯基代邻氨基苯甲酸溶液作为指示剂,采用硫酸亚铁铵标准滴定溶液进行滴定,实现了对钴铬烤瓷合金中铬的测定。根据样品中各元素的含量范围,按照各共存元素含量最大值的2~4倍加入共存元素进行干扰试验,结果表明,在试验条件,铬的回收率为98%~100%,这说明样品中的共存元素不干扰铬的测定。将实验方法应用于钴铬烤瓷合金实际样品中铬的测定,结果的相对标准偏差(RSD,n=11)为0.49%和0.50%,加标回收率在99%~101%之间。根据样品中各元素的组成范围合成钴铬烤瓷合金模拟样品,按照实验方法进行测定,测得铬的含量与理论值相符。     

铜渣改质、磁选及磁选尾渣制备陶瓷的基础研究

针对铜渣难以高效利用的现状,提出以赤泥为改质剂,在熔融铜渣排渣过程中对其进行改质,以提高凝固冷渣磁选率,并进一步将磁选尾渣制备为陶瓷材料的新工艺.本文在铜渣中加入不同掺量的赤泥并经过熔融、冷却、磁选和尾渣制陶工艺获得了磁选铁精粉和尾渣陶瓷产品,通过XRD、SEM等方法研究赤泥对铜渣含铁组分磁选效果的影响,以及磁选尾渣制...     

Preparation and Easy-Cleaning Property of Rare Earth Composite Ceramic

Rare earth and far-infrared mineral composite materials were added to ceramic glazes to prepare easy-cleaning ceramic. The morphology of easy-cleaning ceramic was observed by SEM. The influence of easy-cleaning ceramic on water surface tension and contact angles of water were investigated. Through calculation of ceramic surface free energy and observation of oil drop on ceramic surface in water, the easy-cleaning mechanism of rare earth composite ceramic was studied. It is found that the rare earth composite ceramic can make water surface tension decrease. The surface free energy and the polar component of rare earth composite ceramic are increased. The rare earth composite ceramics have the easy-cleaning property.     

SHS－离心法陶瓷复合钢管的表面质量提高

随着SHS-离心法陶瓷复合钢管的推广应用,对其动态输送性能提出了更高的要求。本文通过添加适当的添加剂,对提高陶瓷复合钢管的表面质量作了研究。结果表明,单独加入CaF2(质量分数)2％时对改善陶瓷表面质量有较好效果,但同时加入3％CaF2和2％SiO2时陶瓷表面质量最好。     

Effect of Rare Earth on Fuel Activation of Far Infrared Ceramic

This work relates to a new type of ceramic with far infrared rays emitting function for improving fuel efficiency, and more particularly for enhancing the combustion efficiency. According to the far infrared rays absorption properties of fuel, some rare earth is added to the ceramic to radiate some far infrared rays with special wavelength. And the effect of rare earth on the fuel activation of the ceramic was investigated.. It is shown that the rare earth cooperates with the ceramic improving the far infrared rays radiation ability. The radiance can reach 90%. With the device of the invention, the double bonds between carbon atoms in the hydrocarbon fuel are broken down to form smaller hydrocarbon molecules lowering the volatilization point thereby enhancing the combustion efficiency. According to the test results,the fuel consumption rate is improved by 4.4%. At the same time, deleterious gas output is reduced obviously to achieve energy conservation and prevent environmental pollution.     

Research on toughening mechanisms of alumina matrix ceramic composite materials improved by rare earth additive

Mixed rare earth elements were incorporated into alumina ceramic materials. Hot-pressing was used to fabricate alumina matrix composites in nitrogen atmosphere protection. Microstructures and mechanical properties of the composites were tested. It was indicated that the bending strength and fracture toughness of alumina matrix ceramic composites sintered at 1550 ℃ and 28 MPa for 30 min were improved evidently. Besides mixed rare earth elements acting as a toughening phase, AlTiC master alloys were also added in as sintering assistants, which could prompt the formation of transient liquid phase, and thus nitrides of rare earth elements were produced. All of the above were beneficial for improving the mechanical properties of alumina matrix ceramic composites.     

应用废铬钴催化剂为原料生产陶瓷、玻璃色料的研究探讨

对氟化工艺废铬钴催化剂回收利用进行了研究,分析了废铬钴催化剂的主要成分.探讨了利用废铬钴催化剂开发陶瓷、玻璃高温色料的方法.通过一系列的试验,得到了陶瓷、玻璃高温黑色色料,此色料加入坯料中打板烧成,发色稳定,着色力强.     

添加微米级ZrC颗粒的低碳微合金钢力学性能研究

真空条件下,在低碳微合金钢中添加体积分数为1.1%的微米级ZrC陶瓷颗粒,在φ450 mm热轧试验机上进行轧制,轧后钢板晶粒被细化到5.5μm,其抗拉强度和屈服强度分别达到635 MPa和517.5 MPa,维氏硬度(HV5)达到214.zrC颗粒对试验钢具有明显的强化作用,在试验钢凝固结晶和后期轧制过程中均起到细化晶粒的作用.热轧钢板的显微组织为铁素体,钢中夹杂物弥散分布.     

添加微米级ZrC颗粒的低碳微合金钢强韧性研究

真空条件下,在低碳微合金钢中添加体积分数为1．1％的微米级ZrC陶瓷颗粒,在φ450mm热轧试验机上进行轧制,将ZrC颗粒作为形变核心和奥氏体及形变诱导铁素体的再结晶核心。热轧后晶粒被细化到5．5um,钢板抗拉强度和屈服强度分别达到635MPaN517．5MPa,钢板强韧化的机制是综合引入了形变强化、相变强化、第二相粒子强化及细晶强化的结果。热轧钢板的显微组织为铁素体加少量珠光体,钢中存在大量第二相粒子,并呈弥散分布。     

Preparation of Cordierite Ceramic Using Mixtures of Ce4+-Modified Amorphous Powder and Oxide Powders

The cordierite ceramic with a high strength and a low thermal expansion coefficient was prepared by using mixtures of Ce4 -modified cordierite amorphous powder and oxide powders of MgO, Al2O3 and SiO2 as starting materials. The transformation procedure of the powders was analyzed by XRD method and the surface morphology of ceramics was examined by SEM method. The flexural strength was measured in a mechanical property testing machine using the Three-Point-Bending sample. Experimental results show that the ceramic added with 10%(mass fraction) of Ce4 -modified amorphous powder is composed of α-cordierite and small amount of CeO2 particles, and has a porosity of 15%(volume fraction) and a flexural strength of 32.6 MPa when sintered at 1350 ℃ for 3 h. It is suggested that this low-cost process is suitable for preparing the components such as supports of vehicle exhaust converters and diesel particulate trappers.