解决厚壁95%Al2O3瓷在热压铸生产线存在的问题

摘要：对用95％Al2O3瓷制厚壁发射管DB941系列产品会造成塌坑、缩孔、皱纹等缺陷进行了分析，并探索其产生的原因，提出了解决的方法，满足了生产所需。     

热压铸厚壁刚玉瓷的研制

分析研究了热压铸成型大件厚壁刚玉瓷生产中经常遇到的一些缺陷,探讨了其产生原因,并提出了解决这些问题的方法。     

热压铸厚壁刚玉瓷的研制

分析研究了热压铸成型大件厚壁刚玉瓷生产中经常遇到的一些缺陷,探讨了其产生原因,并提出了解决这些问题的方法。     

95氧化铝瓷绝缘子瓷转轴在侧部振打电除尘器上的应用

研究了侧部振打用95氧化铝瓷绝缘子瓷转釉 ,并简要介绍了其制造工艺 ,对比分析了电瓷材料与95氧化铝陶瓷材料的性能差异。指出95氧化铝瓷是电除尘器行业用绝缘子的最佳陶瓷材料。     

95氧化铝瓷用高温釉的研究

本文针对95氧化铝瓷的性能要求,用正交实验法优选出了瓷釉配方,在1530℃研制出性能稳定、釉面光滑、光泽好、坯釉适应性好、介电性能良好的瓷釉配方。     

“95”瓷在电除尘装置中的应用

分析了电除尘装置对瓷轴和瓷套的性能要求,对“９５”瓷的机械、耐热及电气性能等进行了分析,并将“９５”瓷与普通瓷的经济指标进行了综合分析,证明“９５”瓷是电除尘中合适的材料。     

浅析95氧化铝瓷斑点的形成原因及解决措施

本文采取对比试验，从主要原材料氧化铝粉以及机械器皿分析，研讨95氧化铝瓷产生斑点的原因，并讨论了斑点的着色机理，并找出了解决措施。     

95瓷气孔的成因及克服方法

本文从影响95瓷气孔率的因素,如料粉的颗粒度、颗粒级配、料浆处理、成瓷的烧结机理等诸多因素人手,通过成瓷后瓷体显微结构的对比分析,采取有效措施解决95瓷气孔率高的问题。     

CaO-MgO-Al_2O_3-SiO_2系95瓷的研究

介绍了CaO－MgO－Al2O3－SiO2系95瓷的配方和生产工艺,并同传统CaO－Al2O3－SiO2和MgO－Al2O3－SiO2系95瓷进行了比较。指出,四元系95瓷具有较高强度和热稳定性。     

Preparation of porous Al2O3 ceramics by starch consolidation casting method

Porous alumina ceramics were fabricated by starch consolidation casting using corn starch as a curing agent while their microstructure, mechanical properties, pore size distribution, and corrosion resistance were examined. Results showed that the porous alumina ceramics with the flexural strength of about 44.31MPa, apparent porosity of about 47.67% and pore size distribution in the range of 1‐4 μm could be obtained with 3wt% SiO₂ and 3wt% MgO additives. Corrosion resistance results showed mass losses: hot H₂SO₄ solution and NaOH solution for 10 hours were 0.77% and 2.19%, which showed that these porous alumina ceramics may offer better corrosion resistance in acidic conditions.     

用轧膜成形方法研制95瓷电路基片(板)

轧膜成形方法是一种薄片瓷坯的成形工艺，主要用于电子陶瓷工业中轧制电路基片(板)，电容及独石电容等瓷坯。轧膜成形属于可塑成形方法，适于轧制1．5m以下坯片，常见为0．5-1．2m。最薄可达0．05m的超薄片，但生产难度较大，且质量不易控制。     

95瓷的生产工艺及其控制

95瓷属高氧化铝系列瓷之一，它具有耐高温、绝缘性能好、强度高且耐腐蚀等特点，广泛应用于机械、电子、轻纺、冶金、化工、航天等领域。本文简述95瓷的制造方法及原料加工工艺。     

95% Al2O3 超长热电偶保护管的研制

叙述了95%Al2O3超长热电偶保护管的研制过程及生产工艺流程,探讨了各种因素对生产工艺的影响.     

热压烧结Al2O3-ZrB2-SiC复相陶瓷的高温力学性能研究

为提高Al2O3陶瓷的高温力学性能,采用热压烧结工艺(烧结温度1 800℃,烧结压力20 MPa,保温1 h)制备了Al2O3-ZrB2-SiC复相陶瓷(简称AZS),并研究了ZrB2含量对Al2O3基陶瓷高温抗折强度和抗热震性的影响。结果表明:1)在Al2O3基陶瓷中加入第二相ZrB2能有效改善材料的高温抗折强度和高温强度保持率,在1 000和1 200℃时,加入20%体积分数ZrB2的AZS陶瓷试样具有最高的高温抗折强度,而加入24%体积分数ZrB2的AZS陶瓷试样具有最高的高温强度保持率。2)AZS陶瓷的抗热震性能优于纯Al2O3陶瓷。经100℃温差急冷后,加入20%体积分数ZrB2的AZS陶瓷具有最高的残余强度,比纯Al2O3陶瓷提高了17.2%;经300和500℃温差急冷后,加入24%体积分数ZrB2的AZS陶瓷都具有最高的残余强度,比Al2O3陶瓷分别提高了35.3%和20.9%。     

Thermomechanical properties of ceramics in the systems Al2O3-TiO2 and Al2O3-TiO2-mullite

Conclusions We studied certain properties of ceramics in the systems Al₂O₃-TiO₂ and Al₂O₃-TiO₂-mullite, obtained by the use of the double-stage synthesis of aluminum titanate.We established the nature of the change in the high-temperature strength in relation to the ratio of Al₂O₃ and aluminum titanate. The maximum high-temperature strength (bending) at 1200°C is possessed by ceramic with a corundum matrix and a volume proportion of aluminum titanate equal to 40–45%.It is established that the addition of CaO + SiO₂ made in amounts of up to 1.0–1.5% contributes to the partial breakdown of the aluminum titanate in the compositions Al₂O₃-TiO₂ and the production of a ceramic with a bending strength of 160–190 N/mm² at 20–200°C, thermal-shock resistance 650–800°C, and thermal conductivity of 1.9–2.1 W/(m·K).We studied the effect of the mullite concentration on the properties of the ceramic in the system Al₂O₃-TiO₂-mullite. The introduction of mullite in amounts of not more than 50%, containing up to 3% of impurities, contributes to an increase in the ceramic's strength in the range 20–1300°C and in the thermal shock resistance.Translated from Ogneupory No. 2, pp. 22–26, February, 1988.     

Tape casting of aqueous Al2O3 slurries

The well-dispersed aqueous Al₂O₃ slurries suitable for tape casting were prepared, the effects of the concentration of dispersant, of the pH value, of solid content etc. on the properties of slurries were investigated, and the results indicated that the rheological of slurries was effected greatly by pH value and organic additives. After cutting, laminating and binder removal, the laminated Al₂O₃ green bodies were sintered by hot-press in a vacuum furnace. SEM micrographs showed that the microstructure of the aqueous green-body and samples were different from that of non-aqueous, and the mechanical properties of aqueous Al₂O₃ samples were much high than that of non-aqueous Al₂O₃.