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CN107903041A - 一种匣钵及其制备方法 - Google Patents

一种匣钵及其制备方法 Download PDF

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CN107903041A
CN107903041A CN201711008124.4A CN201711008124A CN107903041A CN 107903041 A CN107903041 A CN 107903041A CN 201711008124 A CN201711008124 A CN 201711008124A CN 107903041 A CN107903041 A CN 107903041A
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saggar
bonding agent
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CN107903041B (zh
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褚玉能
周慧斌
徐小良
彭志毅
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Hubei Billion European Electronic Ceramic Ltd By Share Ltd
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Abstract

本发明公开了一种匣钵及其制备方法，匣钵包括如下重量百分比组分：38～39％刚玉粉、22～23％粘土、7～8％硬质土、31～32％莫来石、0.5～1％结合剂，该匣钵的制备方法为：按上述质量百分比备料，向上述备料中加入备料总重量10％的水，搅拌5～10分钟，然后将搅拌均匀的浆料依次进行灌模、脱模、风干、烧结，即得。本发明通过调整制备匣钵的备料中各组分的比例，使得制备的匣钵的热膨胀系数变小，其在高温烧结过程中不易发生变形，其增加了匣钵的循环使用次数，延长了匣钵的使用寿命，降低了陶瓷基体的烧结成本。

Description

一种匣钵及其制备方法
技术领域
本发明涉及陶瓷电阻制备技术，尤其是涉及一种匣钵及其制备方法。
背景技术
陶瓷电阻一般通过氧化铝陶瓷基体制作，而氧化铝陶瓷基体根据其中氧化铝的含量分为95％陶瓷基体、90％陶瓷基体、85％陶瓷基体、70％陶瓷基体、50％陶瓷基体等多种，上述多种陶瓷基体均需要在1200～1500℃的高温下烧结而成。目前，陶瓷基体一般在匣钵内烧结而成，由于陶瓷基体烧结的高需求，故对匣钵要求的越来越高。但是，现有的匣钵热膨胀系数高，重复利用率低下，其极大的增加了烧结成本。
发明内容
本发明的目的在于克服上述技术不足，提出一种匣钵及其制备方法，解决现有技术中匣钵热膨胀系数高、重复利用率低下的技术问题。
为达到上述技术目的，本发明的技术方案提供一种匣钵，包括如下重量百分比组分：38～39％刚玉粉、22～23％粘土、7～8％硬质土、31～32％莫来石、0.5～1％结合剂。
同时，本发明还提供一种匣钵的制备方法，包括如下步骤：
(1)按如下重量百分比组分备料：38～39％刚玉粉、22～23％粘土、7～8％硬质土、31～32％莫来石、0.5～1％结合剂；
(2)将上述备料中加入其总重量10％的水，搅拌5～10分钟；具体为混合浆料搅拌至具有一定粘性并能够产生流动状；
(3)将搅拌均匀的浆料依次进行灌模、脱模、风干、烧结，即得。
与现有技术相比，本发明通过调整制备匣钵的备料中各组分的比例，使得制备的匣钵的热膨胀系数变小，其在高温烧结过程中不易发生变形，其增加了匣钵的循环使用次数，延长了匣钵的使用寿命，降低了陶瓷基体的烧结成本。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明提供了一种匣钵，其包括如下重量百分比组分：38～39％刚玉粉、22～23％粘土、7～8％硬质土、31～32％莫来石、0.5～1％结合剂。
其具体制备方法如下：
(1)按如下重量百分比组分备料：38～39％刚玉粉、22～23％粘土、7～8％硬质土、31～32％莫来石、0.5～1％结合剂；其中，本发明的粘土中铝含量为37～40％，且铁含量低于0.5％。而为了保证各组分之间结合的稳定性，刚玉粉的细度为150目、硬质土的细度为200目、莫来石的细度为16目。
而且，本实施例的结合剂可采用市场购买的常规结合剂，例如水玻璃，也可采用包括如下质量百分比组分的结合剂：31.2％二氧化硅、62.8％氧化铝、0.55％氧化铁、0.97％二氧化钛、0.69％氧化钙、0.22％氧化钾、0.22％氧化钠、0.9％二氧化锆、2.15氧化锌、0.3％氧化钯，具体可将上述粉状组分均匀混合即可。
(2)将上述备料中加入其总重量10％的水，搅拌5～10分钟；
(3)将搅拌均匀的浆料依次进行灌模、脱模、风干、烧结，即得。
由于上述组分中刚玉粉和莫来石主要起到骨架支撑作用，而粘土、硬质土及结合剂则起到粘合作用，而为了提高骨架支撑的稳定定及粘合的紧密性，本发明可通过调整上述刚玉粉和莫来石的质量比例以及粘土、硬质土及结合剂的质量比例，当粘土和硬质土以及粘土、硬质土和结合剂分别按照设定的质量比例制备时，制备的匣钵的热膨胀系数更低，循环使用的次数更多。
具体的，当刚玉粉和莫来石的质量比例为38.4:31.3，其制备的匣钵明显具备更小的热膨胀系数，同时当粘土、硬质土及结合剂的质量比例为22.2:7:0.8时，其对应的制备的匣钵明显具备更小的热膨胀。
为了便于说明本发明制备的匣钵具有更低的热膨胀系数及循环使用率，现按上述方法并采用不同的组分制备匣钵，具体组分见表1，并将实施例1～10制备的匣钵与淄博康宁钛海窑具厂有限公司生产的刚玉莫来石匣钵、复合材料匣钵、石英质匣钵进行对比，其中刚玉莫来石匣钵、复合材料匣钵、石英质匣钵分别为对比例1、2、3。
本发明的实施例1～10均按上述方法制备，且采用本实施例公开的上述组分的结合剂，本实施例1～10不同之处在于，每个实施例中各组分的质量比不同。
表1
将本实施例1～10制备的匣钵及对比例1～3的匣钵在相同条件下分别用于烧结电阻陶瓷基体，其对比参数如表2所示：
表2
由表1、表2可知，当其刚玉粉和莫来石的质量比例为38.4:31.3及粘土、硬质土及结合剂的质量比例为22.2:7:0.8时，制备的匣钵具有更低的热膨胀系数，其对应的具有更多的循环使用次数；同时，本实施例1～10制备的匣钵相对对比例1～3的匣钵明显具备更低的膨胀系数及更多的循环使用次数，且本实施例1～10制备的匣钵的循环使用次数大致为对比例1～3的2倍，其极大的延长了匣钵的使用寿命、降低了陶瓷电阻基体的烧结成本，其适于广泛推广。
以上所述本发明的具体实施方式，并不构成对本发明保护范围的限定。任何根据本发明的技术构思所做出的各种其他相应的改变与变形，均应包含在本发明权利要求的保护范围内。

Claims (9)

1.一种匣钵，其特征在于，包括如下重量百分比组分：38～39％刚玉粉、22～23％粘土、7～8％硬质土、31～32％莫来石、0.5～1％结合剂。
2.根据权利要求1所述的匣钵，其特征在于，所述匣钵包括如下重量百分比组分：38.3～38.7％刚玉粉、22.2～22.5％粘土、7～7.3％硬质土、31.2～31.5％莫来石、0.7～0.8％结合剂。
3.根据权利要求2所述的匣钵，其特征在于，所述匣钵包括如下重量百分比组分：38.5％刚玉粉、22.3％粘土、7％硬质土、31.4％莫来石、0.8％结合剂。
4.根据权利要求1所述的匣钵，其特征在于，所述刚玉粉和莫来石的质量比为38.4:31.3。
5.根据权利要求1所述的匣钵，其特征在于，所述粘土、硬质土和结合剂的质量比为22.2:7:0.8。
6.根据权利要求1所述的匣钵，其特征在于，所述粘土中的铝含量为37～40％，且铁含量低于0.5％。
7.根据权利要求1所述的匣钵，其特征在于，所述刚玉粉的细度为150目、硬质土的细度为200目、莫来石的细度为16目。
8.一种匣钵的制备方法，其特征在于，包括如下步骤：
(1)按如下重量百分比组分备料：38～39％刚玉粉、22～23％粘土、7～8％硬质土、31～32％莫来石、0.5～1％结合剂；
(2)将上述备料中加入其总重量10％的水，搅拌5～10分钟；
(3)将搅拌均匀的浆料依次进行灌模、脱模、风干、烧结，即得。
9.根据权利要求8所述的匣钵的制备方法，其特征在于，所述步骤(3)为在自然条件下风干，并在1370～1400℃下烧结3～4小时。
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