CN108911724A - 一种越窑青釉及其烧制方法 - Google Patents

一种越窑青釉及其烧制方法 Download PDF

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CN108911724A
CN108911724A CN201810800594.2A CN201810800594A CN108911724A CN 108911724 A CN108911724 A CN 108911724A CN 201810800594 A CN201810800594 A CN 201810800594A CN 108911724 A CN108911724 A CN 108911724A
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雷慧仙
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Abstract

本发明公开了一种越窑青釉及其烧制方法，由以下组分制成：瓷石32－40％、白云石6－10％、方解石12－16％、紫金土8－14％、长石20－28％以及石英8－12％；越窑青釉的烧制方法，包括以下步骤：S1：选料；S2：粉碎；S3：煅烧；S4：湿法球磨；S5：筛选；S6：制釉；S7：上釉；S8：阴干；S9：装窑；S10：烧制。本发明的有益效果：通过科学的原料配比和制备工艺研制出的青釉瓷质较透，适合刻花划花。

Description

一种越窑青釉及其烧制方法
技术领域
本发明涉及陶瓷釉料领域，具体来说涉及一种越窑青釉及其烧制方法。
背景技术
传统的青釉产品缺陷多，如色彩灰暗、光洁性差、呈色单调、生产成本高，产品难以提档升级，不能满足多层次、各领域消费群体对青釉的文化需求，并且有瑕疵的青釉成为一件不合格品，既浪费了资源，又降低了企业效益，不符合低碳环保生产的要求。
发明内容
针对相关技术中的问题，本发明提出一种越窑青釉及其烧制方法，结构简单，融雪效果好，节能环保，工作效率高。
为了实现上述技术目的，本发明的技术方案是这样的：
一种越窑青釉，由以下组分制成：瓷石32－40％、白云石6－10％、方解石12－16％、紫金土8－14％、长石20－28％以及石英8－12％。
进一步的，由以下组分制备而成：瓷石32％、白云石6％、方解石12％、紫金土 8％、长石20％以及石英8％。
一种越窑青釉的烧制方法，包括以下步骤：
S1：选料：按照上述的配方称取原料备好准备加工；
S2：粉碎：将配方中的各种原料分别粉碎；
S3：煅烧：将粉碎好的材料分别进行煅烧，温度为1000°；
S4：湿法球磨：将煅烧好的材料混合之后进行湿法球磨；
S5：筛选：将球磨好的原材料通过过筛器件进行过筛处理，细度180目；
S6：制釉：将筛选出来的原料加入水搅拌均匀，混合比重1.5；
S7：上釉：将原有的经煅烧后的半成品器皿用浸釉法进行上釉；
S8：阴干：将上好釉水的器皿进行阴干处理，时间24小时；
S9：装窑：将阴干之后的器皿装入窑中；
S10：烧制：还原气氛烧成法进行烧制，待釉面完全熔融即可。
进一步的，步骤S4中所述湿法球磨中原料与水体积比为：1:0.5。
进一步的，步骤S7中，在上釉后所述半成品器皿上的釉料厚度为1毫米。
进一步的，步骤S10中所述还原气氛烧成法的具体过程为：先用时6小时，以慢火烧到500°，完全除去坯体、釉层杂质及水分后，再用5小时升温到960°，保温1小时，开始加气压升温，再升温至1280°烧成结束。
本发明的有益效果：通过科学的原料配比和制备工艺研制出的青釉瓷质较透，适合刻花划花。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本发明保护的范围。
实施例一：一种越窑青釉，由以下组分制备而成：瓷石32％、白云石6％、方解石12％、紫金土8％、长石20％以及石英8％。
一种越窑青釉的烧制方法，包括以下步骤：
S1：选料：按照上述的配方称取原料备好准备加工；
S2：粉碎：将配方中的各种原料分别粉碎；
S3：煅烧：将粉碎好的材料分别进行煅烧，温度为1000°；
S4：湿法球磨：将煅烧好的材料混合之后进行湿法球磨，原料与水体积比为：1:0.5，；
S5：筛选：将球磨好的原材料通过过筛器件进行过筛处理，细度180目，有利于器皿表面的平滑度；
S6：制釉：将筛选出来的原料加入水搅拌均匀，混合比重1.5；
S7：上釉：将原有的经煅烧后的半成品器皿用浸釉法进行上釉，并且保证釉料(步骤S6混合之后就是釉水)的厚度在1毫米左右，使附着的釉层厚薄均匀，保证器皿表面光滑平整；
S8：阴干：将上好釉水的器皿进行阴干处理，时间24小时；
S9：装窑：将阴干之后的器皿装入窑中；
S10：烧制：还原气氛烧成法进行烧制，烧制过程具体为：先用时6小时，以慢火烧到500°，完全除去坯体、釉层杂质及水分后，再用5小时升温到960°，保温1小时，开始加气压升温，再升温至1280°烧成结束，待釉面完全熔融即可。
实施例二：一种越窑青釉，由以下组分制成：瓷石40％、白云石10％、方解石 16％、紫金土14％、长石28％以及石英12％。
一种越窑青釉的烧制方法，包括以下步骤：
S1：选料：按照上述的配方称取原料备好准备加工；
S2：粉碎：将配方中的各种原料分别粉碎；
S3：煅烧：将粉碎好的材料分别进行煅烧，温度为1000°；
S4：湿法球磨：将煅烧好的材料混合之后进行湿法球磨，原料与水体积比为：1:0.5；
S5：筛选：将球磨好的原材料通过过筛器件进行过筛处理，细度180目；
S6：制釉：将筛选出来的原料加入水搅拌均匀，混合比重1.5；
S7：上釉：将原有的经煅烧后的半成品器皿用浸釉法进行上釉，并且保证釉料(步骤S6混合之后就是釉水)的厚度在1毫米左右；
S8：阴干：将上好釉水的器皿进行阴干处理，时间24小时；
S9：装窑：将阴干之后的器皿装入窑中；
S10：烧制：还原气氛烧成法进行烧制，烧制过程具体为：先用时6小时，以慢火烧到500°，完全除去坯体、釉层杂质及水分后，再用5小时升温到960°，保温1小时，开始加气压升温，再升温至1280°烧成结束，待釉面完全熔融即可。
实施例三：
一种越窑青釉，由以下组分制成：瓷石36％、白云石8％、方解石14％、紫金土11％、长石24％以及石英10％。
一种越窑青釉的烧制方法，包括以下步骤：
S1：选料：按照上述的配方称取原料备好准备加工；
S2：粉碎：将配方中的各种原料分别粉碎；
S3：煅烧：将粉碎好的材料分别进行煅烧，温度为1000°；
S4：湿法球磨：将煅烧好的材料混合之后进行湿法球磨，原料与水体积比为：1:0.5；
S5：筛选：将球磨好的原材料通过过筛器件进行过筛处理，细度180目；
S6：制釉：将筛选出来的原料加入水搅拌均匀，混合比重1.5；
S7：上釉：将原有的经煅烧后的半成品器皿用浸釉法进行上釉，并且保证釉料(步骤S6混合之后就是釉水)的厚度在1毫米左右；
S8：阴干：将上好釉水的器皿进行阴干处理，时间24小时；
S9：装窑：将阴干之后的器皿装入窑中；
S10：烧制：还原气氛烧成法进行烧制，烧制过程具体为：先用时6小时，以慢火烧到500°，完全除去坯体、釉层杂质及水分后，再用5小时升温到960°，保温1小时，开始加气压升温，再升温至1280°烧成结束，待釉面完全熔融即可。
以上仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (6)

1.一种越窑青釉，其特征在于，由以下组分制成：瓷石32－40％、白云石6－10％、方解石12－16％、紫金土8－14％、长石20－28％以及石英8－12％。
2.根据权利要求1所述的一种越窑青釉，其特征在于，由以下组分制备而成：瓷石32％、白云石6％、方解石12％、紫金土8％、长石20％以及石英8％。
3.一种如权利要求1-2所述的越窑青釉的烧制方法，其特征在于，包括以下步骤：
S1：选料：按照上述的配方称取原料备好准备加工；
S2：粉碎：将配方中的各种原料分别粉碎；
S3：煅烧：将粉碎好的材料分别进行煅烧，温度为1000°；
S4：湿法球磨：将煅烧好的材料混合之后进行湿法球磨；
S5：筛选：将球磨好的原材料通过过筛器件进行过筛处理，细度180目；
S6：制釉：将筛选出来的原料加入水搅拌均匀，混合比重1.5；
S7：上釉：将原有的经煅烧后的半成品器皿用浸釉法进行上釉；
S8：阴干：将上好釉水的器皿进行阴干处理，时间24小时；
S9：装窑：将阴干之后的器皿装入窑中；
S10：烧制：还原气氛烧成法进行烧制，待釉面完全熔融即可。
4.根据权利要求2所述的一种越窑青釉的烧制方法，其特征在于，步骤S4中所述湿法球磨中原料与水体积比为：1:0.5。
5.根据权利要求2所述的一种越窑青釉的烧制方法，其特征在于，步骤S7中，在上釉后所述半成品器皿上的釉料厚度为1毫米。
6.根据权利要求2所述的一种越窑青釉的烧制方法，其特征在于，步骤S10中所述还原气氛烧成法的具体过程为：先用时6小时，以慢火烧到500°，完全除去坯体、釉层杂质及水分后，再用5小时升温到960°，保温1小时，开始加气压升温，再升温至1280°烧成结束。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115159848B (zh) * 2022-08-02 2023-11-10 蔡永龙 一种哥窑粉青雪花釉料及其制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105753322A (zh) * 2016-03-13 2016-07-13 浙江天丰陶瓷有限公司 一种中温梅子青釉及中温梅子青龙泉青瓷

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105753322A (zh) * 2016-03-13 2016-07-13 浙江天丰陶瓷有限公司 一种中温梅子青釉及中温梅子青龙泉青瓷

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
周晓燕主编: "《陶瓷坯釉料制备技术》", 31 August 2017, 江西高校出版社 *
马铁成主编: "《陶瓷工艺学 第2版》", 31 January 2011, 中国轻工业出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115159848B (zh) * 2022-08-02 2023-11-10 蔡永龙 一种哥窑粉青雪花釉料及其制备方法

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Application publication date: 20181130