CN106630990A - 一种高磁导率铁氧体提高初始磁导率的两次烧结工艺 - Google Patents

一种高磁导率铁氧体提高初始磁导率的两次烧结工艺 Download PDF

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CN106630990A
CN106630990A CN201610844888.6A CN201610844888A CN106630990A CN 106630990 A CN106630990 A CN 106630990A CN 201610844888 A CN201610844888 A CN 201610844888A CN 106630990 A CN106630990 A CN 106630990A
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徐仲达
燕杰
陈志华
许锡坤
毕建国
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Zhejiang Chunhui Magnetoelectric Technology Co Ltd
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Abstract

本发明公开一种高磁导率铁氧体提高初始磁导率的两次烧结工艺，对高磁导率铁氧体产品进行一次烧结后，并拣选电感系数低于最低标准值25％以内的不合格品进行再次烧结，第二次烧结步骤如下：1）将一次烧结电感系数低于最低标准值25％以内不合格品再次装窑；2）排胶段，控制室温升至450℃的时间为6.5h；3）升温段，控制450℃升至高温的时间为7.5h；4）保温段，每需提升12.5％电感系数相对于一次烧结保温段温度提高5℃，高温保温时间为5.0h；5）冷却阶段，冷却阶段1060‑1110℃段氧含量相对于一次烧结冷却阶段氧含量提高0.2％，降温冷却时间为9.0h。从而使一次烧结电感系数低于最低标准值25％以内不合格品经过两次烧结变成满足要求的合格产品。

Description

一种高磁导率铁氧体提高初始磁导率的两次烧结工艺
技术领域
本发明涉及锰锌软磁铁氧体领域，尤其涉及一种高磁导率铁氧体提高初始磁导率的两次烧结工艺。
背景技术
高磁导率铁氧体产品（5K以上）的产品在一次烧结后往往有不少电感量低于要求或批次电感值低于要求的不合格品出现，不合格产品如报废会给企业造成很大的经济损失，以前没有采用两次烧结的新工艺技术，每年都超过上百万元的损失。一次烧结工艺如下：1、装窑；2、排胶， 3、升温， 4、高温保温，根据产品不同选择1380-1400℃间的某一温度保持5h；5、降温，气氛保护冷却，降温冷却时间为9.0h。
发明内容
本发明的目的在于提供一种高磁导率铁氧体提高初始磁导率（电感系数）的两次烧结工艺，使一次烧结电感系数低于标准25％以内不合格品经过两次烧结变成满足要求的合格产品。
为了达到上述目的，本发明的技术方案是：一种高磁导率铁氧体提高初始磁导率的两次烧结工艺，对高磁导率铁氧体产品进行一次烧结后，并拣选电感系数低于标准25％以内的不合格品进行再次烧结，第二次烧结步骤如下：
1）将一次烧结电感系数低于标准25％以内不合格品再次装窑；
2）排胶段，控制室温升至450℃的时间为6.5h；
3）升温段，控制450℃升至高温的时间为7.5h；
4）保温段，每需提升12.5％电感系数相对于一次烧结保温段温度提高5℃，保温时间为5.0h；
5）冷却阶段，冷却阶段1060-1110℃段氧含量相对于一次烧结冷却阶段前氧含量提高0.2％，降温冷却时间为9.0h。
上述的一次烧结包括如下步骤：
1）装窑；
2）排胶段，从室温升至450℃的时间为6.5h；
3）升温段，从450℃升至高温的时间为7.5h；
4）保温段，根据产品不同选择1380-1400℃间的某一温度保持5.0h；
5）降温段，冷却阶段1050℃时氧含量0.1％，1060℃时氧含量0.15％，1080℃时氧含量0.45％；1110℃时氧含量0.65％。降温冷却时间为9.0h。
上述的第二次烧结步骤如下：
1）将一次烧结电感系数（初始磁导率）低于标准25％以内不合格品再次装窑；
2）排胶段，控制室温升至450℃的时间为6.5h；
3）升温段，控制450℃升至高温的时间为7.5h；
4）保温段，相对于一次烧结保温段温度提高5-10℃，保温时间为5.0h；
5）降温段，冷却阶段1050℃时氧含量0.1％，1060℃时氧含量0.35％，1080℃时氧含量0.65％；1110℃时氧含量0.85％。降温冷却时间为9.0h。
本发明的有益效果是：使一次烧结电感系数低于标准25％以内不合格品经过两次烧结变成满足要求的合格产品。
具体实施方式
实施例1
将RH7K（38*19*13）进行一次烧结包括如下步骤：装窑，排胶段6.5h将温度从室温升至450℃，升温段7.5h将温度从450℃升至1390℃，保温段1390℃保温5.0h，冷却阶段，1050℃时氧含量0.1％，1060℃时氧含量0.15％，1080℃时氧含量0.45％；1110℃时氧含量0.65％，降温冷却时间为9.0h。将电感系数低于标准25％以内的不合格品再次装窑，排胶段6.5h将温度从室温升至450℃，升温段7.5h将温度从450℃升至1400℃，保温段1400℃保温5.0h，冷却阶段，1050℃时氧含量0.1％，1060℃时氧含量0.35％，1080℃时氧含量0.65％；1110℃时氧含量0.85％，降温冷却时间为9.0h。
实施例2
将RH10（38*24*22）进行一次烧结包括如下步骤：装窑，排胶段6.5h将温度从室温升至450℃，升温段7.5h将温度从450℃升至1400℃，保温段1400℃保温5.0h，冷却阶段，1050℃时氧含量0.1％，1060℃时氧含量0.15％，1080℃时氧含量0.45％；1110℃时氧含量0.65％，降温冷却时间为9.0h。将电感系数超标在25％以内的不合格品再次装窑，排胶段，6.5h将温度从室温升至450℃，升温段7.5h将温度从450℃升至1410℃，保温段1410℃保温5.0h，冷却阶段，1050℃时氧含量0.1％，1060℃时氧含量0.35％，1080℃时氧含量0.65％；1110℃时氧含量0.85％，降温冷却时间为9.0h。
实例1、2（电感系数单位：nH/N2。测试条件：f=1KHz；N=10Ts；T=25±3℃）

Claims (3)

1.一种高磁导率铁氧体提高初始磁导率的两次烧结工艺，对高磁导率铁氧体产品进行一次烧结后，并拣选电感系数低于标准25％以内的不合格品进行再次烧结，其特征在于，第二次烧结步骤如下：
1）将一次烧结电感系数（初始磁导率）低于标准25％以内不合格品再次装窑；
2）排胶段，控制室温升至450℃的时间为6.5h；
3）升温段，控制450℃升至高温的时间为7.5h；
4）保温段，每需提升12.5％电感系数相对于一次烧结保温段温度提高5℃，高温保温为5.0h；
5）冷却阶段，冷却阶段1060-1110℃段氧含量相对于一次烧结冷却阶段氧含量提高0.2％，降温冷却时间为9.0h。
2.根据权利要求1所述一种高磁导率铁氧体提高初始磁导率的两次烧结工艺，其特征在于，所述一次烧结包括如下步骤：
1）装窑；
2）排胶段，从室温升至450℃的时间为6.5h；
3）升温段，从450℃升至高温℃的时间为7.5h；
4）保温段，根据产品不同选择1380-1400℃间的某一温度保持5h；
5）降温段，冷却阶段1050℃时氧含量0.1％，1060℃时氧含量0.15％，1080℃时氧含量0.45％；1110℃时氧含量0.65％，降温冷却时间为9.0h。
3.根据权利要求1所述一种高磁导率铁氧体提高初始磁导率的两次烧结工艺，其特征在于，第二次烧结步骤如下：
1）将一次烧结电感系数（初始磁导率）低于标准25％以内不合格品再次装窑；
2）排胶段，控制室温升至450℃的时间为6.5h；
3）升温段，控制450℃升至高温的时间为7.5h；
4）保温段，相对于一次烧结保温段温度提高5-10℃，保温时间为5.0h；
5）冷却阶段，1050℃时氧含量0.1％，1060℃时氧含量0.35％，1080℃时氧含量0.65％；1110℃时氧含量0.85％，降温冷却时间为9.0h。
CN201610844888.6A 2016-09-23 2016-09-23 一种高磁导率铁氧体提高初始磁导率的两次烧结工艺 Active CN106630990B (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN108831730A (zh) * 2018-06-04 2018-11-16 安徽天宇磁业股份有限公司 一种永磁铁的制备工艺

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* Cited by examiner, † Cited by third party
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CN108831730A (zh) * 2018-06-04 2018-11-16 安徽天宇磁业股份有限公司 一种永磁铁的制备工艺

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