CN109081691A - 一种管状陶瓷制备方法 - Google Patents

一种管状陶瓷制备方法 Download PDF

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CN109081691A
CN109081691A CN201811068122.9A CN201811068122A CN109081691A CN 109081691 A CN109081691 A CN 109081691A CN 201811068122 A CN201811068122 A CN 201811068122A CN 109081691 A CN109081691 A CN 109081691A
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CN109081691B (zh
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赵鹏
李卓
景明海
苏兴华
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Changan University
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
    • C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
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    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3213—Strontium oxides or oxide-forming salts thereof

Abstract

本发明公开了一种管状陶瓷制备方法。所公开的方法包括：将陶瓷粉体预烧后，添加粘合剂之后成形得到柱状体；适宜温度、适宜柱状体径向截面电流大小、适宜烧结时长的条件下对柱状体进行烧结，使得柱状体内局部沿轴向产生质地疏松柱体、质地疏松柱体外部形成质地致密管体；剔除质地疏松柱体得到管状陶瓷。本发明通过控制电烧结条件使得陶瓷样品中间发生过烧，直接在陶瓷致密化工程中，形成中空结构；所得管状电子陶瓷晶粒小，均匀，介电性能优良。

Description

一种管状陶瓷制备方法
技术领域
本发明属于电子陶瓷材料制备技术领域，具体涉及一种管状陶瓷制备方法。
背景技术
电厂辅助烧结技术是近几年出现的一种新型陶瓷烧结方法。最早的出现于1952年Hill的文章中，文中描述了一种在压力辅助条件下，将电流直接通过迅速升温的金属陶瓷坯体，来制备金属陶瓷块体材料的方法。现在所说的闪烧是一个新的烧结概念，2010年由Cologna等报道，在此文及其后续的研究论文中氧化锆[3％(摩尔分数)Y2O3–ZrO2，3YSZ]陶瓷坯体烧结取得很好的结果，但是绝缘体电流烧结相对困难一些。
管状电子陶瓷属于中空结构，需要专门的模具进行压力成型，而在烧结好的致密陶瓷体中开孔，需要激光加工，费时费力。
发明内容
针对现有技术中的缺陷和不足，本发明一种管状陶瓷制备方法.
本发明提供的管状陶瓷制备方法包括：将陶瓷粉体预烧后，添加粘合剂之后成形得到柱状体；适宜温度、适宜柱状体径向截面电流大小、适宜烧结时长的条件下对柱状体进行烧结，使得柱状体内局部沿轴向产生质地疏松柱体、质地疏松柱体外部形成质地致密管体；剔除质地疏松柱体得到管状陶瓷。
进一步，所述柱状体为圆柱体。
可选的，所述电流为交流电流或者直流电流。
进一步，本发明还提供了一种管状钛酸锶钡陶瓷制备方法。所提供的管状钛酸锶钡陶瓷制备方法包括：
将钛酸锶钡陶瓷粉体预烧后，添加粘合剂后成形得到柱状体； 700-1000℃、柱状体径向截面电流为10-50毫安/平方毫米的条件下对柱状体烧结0.5-10分钟，柱状体内局部沿轴向产生质地疏松柱体、质地疏松柱体外部形成质地致密管体；剔除质地疏松柱体得到管状钛酸锶钡陶瓷。
优选的，所述钛酸锶钡陶瓷中锶原子摩尔数占锶钡原子总摩尔数的 15％-85％；所述粘结剂为PVA，所述粘结剂占所述钛酸锶钡粉体质量的0.8％-1.2％，所述预烧温度为900-1100℃。
本发明的优点为：
(1)本发明通过控制电烧结条件使得陶瓷样品中间发生过烧，直接在陶瓷致密化工程中，形成中空结构。
(2)本发明的管状电子陶瓷晶粒小，均匀，介电性能优良。
附图说明
图1为实施例1所得管状陶瓷材料的介电性能曲线。
图2为实施例1所得柱状体结构示意图。
具体实施方式
本发明的工艺适用于管状陶瓷材料的制备，以下选取钛酸锶钡陶瓷为例对本发明做进一步解释说明。对于其他种类陶瓷来讲，依据本发明的思路选择合适的温度、电流、烧结时长可得到陶瓷管，也可对陶瓷材料的配方及预烧环节进行选择性优化得到管状陶瓷材料。
实施例1：
按照钡锶摩尔比为7:3的钛酸锶钡陶瓷粉体在1000℃的温度下预烧2 小时后，添加1％的PVA粘合剂，在200Mpa的压力下成型成直径6毫米，长度为3毫米的圆柱体；在圆柱体上施加电压，总电流控制在300毫安范围内，于970℃炉温下烧结300秒得到如图2所示柱状体；如图2所示，所得烧结柱状体内因过烧产生晶粒粉体过大、无机械强度的质地疏松柱状体(图中黑色线条标识区域)，从图中可以看出，该质地疏松柱状体的颜色较周边致密材料的颜色浅，接近白色，采用机械或激光手段剔除该部分质地疏松柱状体后得管状陶瓷。在-30℃-140℃的温度下介电频谱扫频测试测出管状电子陶瓷介电性能如表1所示。其介电性能曲线如图1所示。
表1
最大介电常数 损耗角正切 居里点
11766 0.08425 6.0
实施例2：
按照钡锶比为8:2的钛酸锶钡陶瓷粉体在1100℃的温度下预烧1小时后，添加1％的PVA粘合剂，在300Mpa的压力下成型成直径6毫米，长度为3毫米的圆柱体；施加直流电压，电流控制在1000毫安范围内，于700℃炉温下烧结400秒；采用机械或激光手段剔除中间部分质地疏松柱状体后得管状陶瓷。在-30℃-140℃的温度下测出管状电子陶瓷介电性能如表2所示。
表2
最大介电常数 损耗角正切 居里点oC
10621 0.00353 9.0
实施例3：
按照钡锶比为1:1的钛酸锶钡陶瓷粉体在900℃的温度下预烧2小时后，添加1.2％的PVA粘合剂，在300Mpa的压力下成型成直径6毫米，长度为3 毫米的圆柱体；采用银电极，施加直流电压，电流控制在600毫安范围内，于850℃炉温下烧结400秒；采用机械或激光手段剔除中间部分质地疏松柱状体后得管状陶瓷。在-30℃-140℃的温度下测出管状电子陶瓷介电性能如表3所示。
表3
最大介电常数 损耗角正切 居里点
8162 0.05502 3.8

Claims (5)

1.一种管状陶瓷制备方法，其特征在于，方法包括：
将陶瓷粉体预烧后，添加粘合剂之后成形得到柱状体；
适宜温度、适宜柱状体径向截面电流大小、适宜烧结时长的条件下对柱状体进行烧结，使得柱状体内局部沿轴向产生质地疏松柱体、质地疏松柱体外部形成质地致密管体；
剔除质地疏松柱体得到管状陶瓷。
2.如权利要求1所述的管状陶瓷制备方法，其特征在于，所述柱状体为圆柱体。
3.如权利要求1所述的管状陶瓷制备方法，其特征在于，所述电流为交流电流或者直流电流。
4.一种管状钛酸锶钡陶瓷制备方法，其特征在于，方法包括：
将钛酸锶钡陶瓷粉体预烧后，添加粘合剂后成形得到柱状体；
700-1000℃、柱状体径向截面电流为10-50毫安/平方毫米的条件下对柱状体烧结0.5-10分钟，柱状体内局部沿轴向产生质地疏松柱体、质地疏松柱体外部形成质地致密管体；
剔除质地疏松柱体得到管状钛酸锶钡陶瓷。
5.如权利要求4所述的管状钛酸锶钡陶瓷制备方法，其特征在于，方法包括：所述钛酸锶钡陶瓷中锶原子摩尔数占锶钡原子总摩尔数的15％-85％；所述粘结剂为PVA，所述粘结剂占所述钛酸锶钡粉体质量的0.8％-1.2％，所述预烧温度为900-1100℃。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111261935A (zh) * 2020-03-04 2020-06-09 四川固蜀材料科技有限公司 一种钠离子导体固体电解质材料、制备方法及应用
CN115304369A (zh) * 2022-03-09 2022-11-08 陕西科技大学 一种高介电高击穿钛酸锶陶瓷的制备方法

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Publication number Priority date Publication date Assignee Title
CN86103814A (zh) * 1985-04-25 1987-03-04 谭氏陶器有限公司 超低温烧成陶瓷组合物
JP2000239708A (ja) * 1999-02-16 2000-09-05 Ishikawajima Harima Heavy Ind Co Ltd 焼結装置
CN204993912U (zh) * 2015-07-23 2016-01-20 张贻新 一种节能陶瓷电热管
CN109357528A (zh) * 2018-08-14 2019-02-19 长安大学 一种利用电场辅助的陶瓷材料烧结炉及其控制方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86103814A (zh) * 1985-04-25 1987-03-04 谭氏陶器有限公司 超低温烧成陶瓷组合物
JP2000239708A (ja) * 1999-02-16 2000-09-05 Ishikawajima Harima Heavy Ind Co Ltd 焼結装置
CN204993912U (zh) * 2015-07-23 2016-01-20 张贻新 一种节能陶瓷电热管
CN109357528A (zh) * 2018-08-14 2019-02-19 长安大学 一种利用电场辅助的陶瓷材料烧结炉及其控制方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111261935A (zh) * 2020-03-04 2020-06-09 四川固蜀材料科技有限公司 一种钠离子导体固体电解质材料、制备方法及应用
CN115304369A (zh) * 2022-03-09 2022-11-08 陕西科技大学 一种高介电高击穿钛酸锶陶瓷的制备方法
CN115304369B (zh) * 2022-03-09 2023-08-22 陕西科技大学 一种高介电高击穿钛酸锶陶瓷的制备方法

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