Dimensional Accuracy Control of Gelcast Ceramic Green Body During Drying Process with Solid Desiccant

doi:10.7652/xjtuxb201702021

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Dimensional Accuracy Control of Gelcast Ceramic Green Body During Drying Process with Solid Desiccant

更新时间：2025-07-09

- Dimensional Accuracy Control of Gelcast Ceramic Green Body During Drying Process with Solid Desiccant
- Vol. 51, Issue 2, Pages: 135-139(2017)
- 作者机构：
  
  1. 西安交通大学机械制造系统工程国家重点实验室,西安,710049
  2. 先进航空发动机协同创新中心,北京,100191
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201702021
  CLC： TG221;V254.2
- Online First：10 February 2017，
  
  Published：2017
- 稿件说明：
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Dimensional Accuracy Control of Gelcast Ceramic Green Body During Drying Process with Solid Desiccant[J]. 2017, 51(2): 135-139.
DOI：

Dimensional Accuracy Control of Gelcast Ceramic Green Body During Drying Process with Solid Desiccant[J]. 2017, 51(2): 135-139. DOI： 10.7652/xjtuxb201702021.

摘要

针对凝胶注模陶瓷素坯在加热干燥过程中收缩较大的问题

采用固体干燥剂干燥工艺以提高陶瓷素坯的干燥尺寸精度。重点研究了CaO、无水MgSO

和SiC粉体3种固体干燥剂的成分、粒径尺寸以及环境湿度对陶瓷素坯干燥线收缩率的影响规律

分析了具备不同物理化学属性的3种固体干燥剂对素坯失水速率和表面蒸汽压的影响规律

并结合红外光谱测试了凝胶结构均匀性对素坯干燥尺寸精度的影响规律

采用CT扫描对陶瓷素坯的尺寸变化进行了表征。结果表明:在相同的温度和湿度条件下

固体干燥剂干燥工艺降低了陶瓷素坯干燥前期的失水速率

延长了等速干燥阶段的时间

并提高了凝胶结构均匀性和素坯强度

因此降低了素坯干燥线收缩率; 当温度为40 ℃时

采用2 μm粒径的CaO干燥剂可将陶瓷素坯的干燥线收缩率降至0.12%。

Abstract

A drying process with solid desiccant is carried out to restrain large shrinkage and to improve the dimensional accuracy of ceramic green body during heating drying. The effects of particle size and humidity of three kinds of solid desiccants including CaO

anhydrous MgSO

and SiC on shrinkage are investigated. The improvement of drying shrinkage of ceramic green body is analyzed in terms of dehydration rate

surface vapor pressure and homogeneity of gel structure. The dimensional variation of the ceramic body is characterized by computed tomography(CT). The results show that drying process with solid desiccant can reduce the dehydration rate at initial stage

extend the constant drying period and improve the homogeneity of

gel structure and the strength of ceramic body

thus the dimensional accuracy of the ceramic body is greatly heightened

and the drying shrinkage of the ceramic body lowers to 0.12% by means of CaO powder(particle size 2 μm)at 40 ℃.

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references

文生琼, 何爱杰. 陶瓷基复合材料在航空发动机热端部件上的应用 [J]. 航空制造技术, 2009(S1): 4-7.

WEN Shengqiong, HE Aijie. Application of ceramic matrix composites in hot end components of aero engine [J]. Aeronautical Manufacturing Technology, 2009(S1): 4-7.

焦健, 陈明伟. 新一代发动机高温材料: 陶瓷基复合材料的制备、性能及应用 [J]. 航空制造技术, 2014(7): 62-69.

JIAO Jian, CHEN Mingwei. New generation of high-temperature material for engine: preparation, property and application of ceramic matrix composites [J]. Aeronautical Manufacturing Technology, 2014(7): 62-69.

范春华, 赵剑峰, 董丽华. 快速成形技术及其应用 [M]. 北京: 电子工业出版社, 2009: 1-3.

GILISSEN R, ERAUW J P, SMOLDERS A, et al. Gelcasting, a near net shape technique [J]. Materials Design, 2000, 21(4): 251-257.

潘永康, 王喜忠, 刘相东. 现代干燥技术 [M]. 2版. 北京: 化学工业出版社, 2006: 878-884.

WANG X F, WANG R C, PENG C Q, et al. Solvent drying of gelcasting green bodies [J]. Chinese Journal of Nonferrous Metals, 2013, 23(12): 3374-3380.

曾令可, 税安泽. 陶瓷工业实用干燥技术与实例 [M]. 北京: 化学工业出版社, 2008: 2-3.

许庆华, 袁欣, 许盛英, 等. 石灰环保吸音板: 103526840A [P]. 2014-01-22.

杜彦召, 陈朝阳, 陈运法, 等. 尉犁蛭石微波膨胀试验研究 [J]. 非金属矿, 2007, 30(5): 4-6.

DU Yanzhao, CHEN Chaoyang, CHEN Yunfa, et al. Study on preparation of expanded vermiculite by microwave irradiation [J]. Non-Metallic Mines, 2007, 30(5): 4-6.

罗玉林. 氧化铍凝胶注模成型工艺的研究 [D]. 长沙: 中南大学, 2010: 61-71.

郑邦乾, 张洁辉. 高吸水性树脂粒径与性能的研究 [J]. 高分子材料科学与工程, 1994(4): 119-124.

ZHENG Bangqian, ZHANG Jiehui. Study on particle size and properties of super absorbent polymer [J]. Polymer Materials Science and Engineering, 1994(4): 119-124.

吕志刚, 姜不居, 闫双景, 等. 风速和湿度对硅溶胶干燥过程的影响 [J]. 特种铸造及有色合金, 2003(4): 48-49.

LÜ Zhigang, JIANG Buju, YAN Shuangjing, et al. Influence of air flow rate and humidity on the drying of colloidal silicate [J]. Special Casting Nonferrous Alloys, 2003(4): 48-49.

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