低介电常数、低CTE、高Tg PCB基材的制法

通过实例介绍了低介电常数、低CTE、高Tg印制电路板基材的制法。     

无机陶瓷膜处理的碱炼废水用于大豆油酶法脱胶

采用无机陶瓷膜过滤技术处理食用油脂加工的废水,并将处理后废水应用于油脂脱胶工艺中,通过单因素试验及正交试验确定油脂废水酶法脱胶的最优工艺条件:陶瓷膜处理后的碱炼水洗废水添加量2%,加酶量30 mg/kg,温度45℃,时间4 h,搅拌速度100 r/min。在最优工艺条件下进行脱胶试验,测定脱胶油中的磷含量为4.15 mg/kg,同时在表压300 kPa条件下,采用陶瓷膜处理后的碱炼水洗废水脱胶,加工大豆油可节省蒸汽消耗0.016吨/吨油。     

无损检测技术在陶瓷材料检测中的应用

本文首先简述陶瓷制品的制作要求及材料制作过程中容易产生的缺陷。介绍超声检测、红外热成像检测技术在陶瓷材料检测中的应用。超声检测术适用于检测陶瓷制品生产过程中的各类缺陷;红外成像检测技术更适合工业生产自动化、大批量检测。为今后陶瓷制品的检测及质量把控奠定了基础。     

矿石T陶瓷球处理水在卷烟生产中的应用

为寻找新的改善卷烟抽吸品质的方法,研究了天然矿石T陶瓷球处理水在卷烟中的应用.结果表明:①矿石T陶瓷球处理水的pH和钙离子浓度增大,17O核磁半峰宽和水的表面张力明显减小,且随着陶瓷球用量和浸泡时间变化;②矿石T陶瓷球处理水稀释的料液添加的烟丝糖碱比较对照略上升,总碱明显降低;③矿石T陶瓷球处理水稀释的料液在降低卷烟烟气杂气和刺激性,增加甜度方面效果较好,而在提高津润感和柔和性方面效果相对较差;④矿石T陶瓷球处理水稀释料液添加的烟丝pH及其卷烟烟气常规检测指标与对照差别不大.     

Review of zirconia-based bioceramic: Surface modification and cellular response

Zirconia is gaining interest as a ceramic biomaterial for implant applications due to its biocompatibility and desirable mechanical properties. At present, zirconia-based ceramic is often seen in the applications of hip replacement and dental implants. This paper briefly reviews different surface modification techniques that have been applied to zirconia such as polishing, sandblasting, etching, biofunctionalization, coating, laser treatment, and ultraviolet light treatment. The cellular response of osteoblast-like cell, osteoblast cell, fibroblast, and epithelial cell to the modified surface is discussed in terms of their adhesion, proliferation, and metabolic activity. The potential of surface modification to make zirconia a successful implant material in the future is highly dependent on the establishment of successful in vitro and in vivo studies. Hence, further effort should be made in order to deepen the understanding of tissue response to the implant and the tissue regeneration process. The review concludes with future prospect of research and further challenges in developing better zirconia bioceramics.     

Production of a stable and homogeneous colloid dispersion of nano CoAl2O4 pigment for ceramic ink-jet ink

Different types of nano-CoAl₂O₄ pigments were prepared by controlling concentration of cetyltrimethylammonium bromide (CTAB) and polyvinyl pyrrolidone (PVP) as double capping agents in a co-precipitation process. The prepared nano-CoAl₂O₄ pigments were characterized by TGA, UV spectroscopy, and XRD. The optimum synthesized nano pigment was well dispersed into de-ionized water to form the ink. Rheology, surface tension and DLS of the prepared ink were examined. The prepared ink was printed onto a ceramic substrate. The printing process was repeated 1, 3 and 5 times in order to evaluate variations in the optical properties by changing thicknesses of the printed film. Appearance of the printed image and morphology of the prepared nano-pigments were observed by SEM. Moreover, shape and size of the nano-particles in the prepared ink were investigated by TEM. The obtained results revealed that the ink-jet printing method can be used to produce a nano-film of pigments on the ceramic.     

Finite Element Analysis of Ceramic Coatings under Spherical Indentation with Metallic Interlayer: Part Ⅰ Uncracked Coatings

Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis (FEA). Two typical ceramic coatings with relatively high and low elastic modulus deposited on aluminum alloy and carbon steel were considered. Various combinations of indenter radius-coating thickness ratios and interlayer thickness-coating thickness ratios were used in the modeling. The effects of the interlayer, the coating and the substrate on the indentation behavior, such as the radial stress distribution along the coating surface as well as the coating interface, and the plastic deformation zone evolution in the substrate were investigated in connection with the above mentioned ratios. The coating cracking dominant modes were also discussed within the context of the peak tensile stresses on the coating surface and on the coating interface.     

Fabrication of novel AlN-SiC-C refractories by nitrogen gas-pressure sintering of Al4SiC4

Novel AlN-SiC-C refractories were fabricated by nitrogen gas-pressure sintering using single Al₄SiC₄ as raw-material. The high nitrogen pressure is essential and effective for the nitridation because it contributes to the diffusion of the nitrogen atoms into the interior matrix of Al₄SiC₄ specimen. Different from traditional carbon-containing refractories and ceramic bonded carbon materials (CBCs), the resulted products possess a honeycomb microstructure consisting of interlocked structure of worm-like SiC and C particles with a AlN ceramic boundary. AlN-SiC nanoparticles and aluminum carbonitride particles (Al-C-Ns) were formed at the interface between AlN-rich and C/SiC-rich area, which acted as transition phases that make these two areas combined tightly. The as-prepared AlN-SiC-C refractories at 1700 ℃ by a 20 atm pressure showed a relative density of 75.8%, combining a bulk density of 2.20 g/cm³ with a flexural strength of 120.9 MPa. Furthermore, the potential reaction mechanism responsible for fabrication of AlN-SiC-C refractories was revealed.     

21世纪的湖南陶瓷如何定位

从六个方面就21世纪的湖南陶瓷如何定位的问题进行了深入的探讨,并提出了相应的对策。     

应用陶瓷型人工髋关节治疗中青年髋关节伤病

目的比较陶瓷型与生物固定型人工髋关节治疗中青年髋关节创病的中短期应用结果，以探讨陶瓷型人工髋关节假体的临床应用价值。方法对人工全髋关节置换术132例164髋进行随访，其中生物固定型超高分子聚乙烯-钻铬钼合金全髋假体97例99髋，陶瓷-陶瓷非骨水泥型假体35例35髋，应用Harris评分进行功能评价，应用Gruen股骨分区与髋臼Delee—charnly分区方法进行影像学评价。结果Harris功能评分两组患者之间未见显著性差异，但是影象学上，超高分子聚乙烯-钻铬钼合金假体的松动范围或程度要大于陶瓷假体。结论对于年轻患者，陶瓷-陶瓷假体中短期效果良好，影象学松动率明显低于超高分子聚乙烯-钻铬钼合金假体。但是由于其价格昂贵，使用范围受到限制，而且远期结果有待于临床观察。