A high yield ceramic powder and a method for making the same

Abstract

The application relates to the technical field of high-performance ceramic powder, in particular to a high-good-rate ceramic powder and a preparation method thereof. 0.9 Ca 0.1 ZrO3, and a sintering aid is ZnO and V2O5. The application develops MgZrO3-CaZrO3 microwave dielectric ceramic, and through the introduction of ZnO and V2O5 auxiliary sintering, a new material system makes the good rate of the ceramic powder greater than 90%, improves the production rate, and reduces the production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-performance ceramic powder, and particularly relates to a high-yield ceramic powder and a preparation method thereof. BACKGROUND

[0002] High integration is the development direction of 5G base stations. Ceramic dielectric filters have the advantages of high dielectric constant, low loss, miniaturization, high reliability and the like, and become the optimal choice for filters used in 5G base stations.

[0003] At present, high-performance filter ceramic powder faces many problems, which seriously affects the station building speed of 5G base stations. Among the many problems, the production yield is low, only about 70%, which seriously restricts the production speed and increases the production cost. SUMMARY

[0004] The present application aims to provide a high-yield ceramic powder and a preparation method thereof, and solve the technical problem of low production yield of ceramic powder in the prior art.

[0005] The present application discloses a high-yield ceramic powder, the chemical formula of the ceramic powder is Mg 0.9 Ca 0.1 ZrO3, and the sintering aid is ZnO and V2O5.

[0006] Further, the sintering aid is 1 wt% ZnO and 0.2-2.5 wt% V2O5.

[0007] A high-yield ceramic powder preparation method comprises the following steps:

[0008] S1. Milling MgO and ZrO2, drying and sieving, and then pre-sintering to obtain primary MgZrO3 powder;

[0009] S2. Milling CaO and ZrO2, drying and sieving, and then pre-sintering to obtain primary CaZrO3 powder;

[0010] S3. Mixing the primary MgZrO3 powder, the primary CaZrO3 powder and the sintering aid and performing secondary milling, drying and sieving after secondary milling, and sintering to obtain the ceramic powder.

[0011] Further, the pre-sintering temperature is 1200 DEG C, and the temperature is kept for 2h.

[0012] Further, the pre-sintering temperature is 1200 DEG C, and the temperature is kept for 2h.

[0013] Further, in step S3, the primary MgZrO3 powder and the primary CaZrO3 powder are added in a molar ratio of 9:1. Further, in step S3, the primary MgZrO3 powder and the primary CaZrO3 powder are added in a molar ratio of 9:1.

[0014] Further, the sintering aid is ZnO and V2O5.

[0015] Further, the sintering aid is 1 wt% ZnO and 0.2-2.5 wt% V2O5.

[0016] Further, the sintering system is first heated to 500 ℃ for 2h, and then heated to 1350 ℃ for 4h.

[0017] Further, the heating rate of the sintering is 2 ℃ / min.

[0018] Compared with the prior art, the present application has the beneficial effects that:

[0019] 1. The present application develops MgZrO3-CaZrO3 microwave dielectric ceramic, and through the introduction of ZnO and V2O5 auxiliary sintering, the new material system makes the good rate of ceramic powder greater than 90%, improves the production rate, and reduces the production cost. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0021] Example 1

[0022] A high-good-rate ceramic powder and a preparation method thereof are disclosed in the present embodiment, which comprises the following steps:

[0023] Step 1: 40.3g of MgO and 123.2g of ZrO2 are weighed and added into a 1L ball mill tank, 200g of large balls, 200g of small balls and 100ml of water are further added, and ball milling is carried out at a speed of 300 rpm for 12h; after drying at 100℃, grinding is carried out through a 100 mesh sieve, and then a sintering furnace is used to heat to 1200 ℃ at a heating rate of 5 ℃ / min for 2h of heat preservation to obtain a first grade MgZrO3 powder.

[0024] Step 2: 50.1g of CaO and 123.2g of ZrO2 are weighed and added into a 1L ball mill tank, 200g of large balls, 200g of small balls and 100ml of water are further added, and ball milling is carried out at a speed of 300 rpm for 12h; after drying at 100℃, grinding is carried out through a 100 mesh sieve, and then a sintering furnace is used to heat to 1200 ℃ at a heating rate of 5 ℃ / min for 2h of heat preservation to obtain a first grade CaZrO3 powder.

[0025] Step 3: 147.2 g of the primary MgZrO3 powder, 17.3 g of the primary CaZrO3 powder, 1.65 g of ZnO and 1.65 g of V2O5 were weighed into a 1 L ball mill jar, 200 g of large balls, 200 g of small balls and 100 ml of water were added, and the ball milling was carried out at a rotation speed of 300 rpm for 12 h; after drying at 100 ℃, the product was ground through a 100 mesh sieve, and then the sintering furnace was heated to 500 ℃ at a heating rate of 2 ℃ / min, kept for 2 h, heated to 1350 ℃ at a heating rate of 2 ℃ / min, and kept for 4 h, to obtain the ceramic powder.

[0026] Example 2

[0027] In this embodiment as a preferred embodiment of the present application, a high-yield ceramic powder and a preparation method thereof are disclosed, which are changed from Example 1 only in that 0.82 g of V2O5 is weighed during the secondary ball milling.

[0028] Example 3

[0029] In this embodiment as a preferred embodiment of the present application, a high-yield ceramic powder and a preparation method thereof are disclosed, which are changed from Example 1 only in that 2.47 g of V2O5 is weighed during the secondary ball milling.

[0030] Example 4

[0031] In this embodiment as a preferred embodiment of the present application, a high-yield ceramic powder and a preparation method thereof are disclosed, which are changed from Example 1 only in that 3.29 g of V2O5 is weighed during the secondary ball milling.

[0032] Comparative Example 1

[0033] In this embodiment as a comparative example of the present application, a high-yield ceramic powder and a preparation method thereof are disclosed, which are changed from Example 1 only in that 0.41 g of V2O5 is weighed during the secondary ball milling.

[0034] Comparative Example 2

[0035] In this embodiment as a comparative example of the present application, a high-yield ceramic powder and a preparation method thereof are disclosed, which are changed from Example 1 only in that 4.11 g of V2O5 is weighed during the secondary ball milling.

[0036] The ceramic powders in Examples 1-4 and Comparative Examples 1-2 were subjected to dielectric property tests according to GB / T 29306.1-2012 and GB / T 29306.2-2012, and the results are shown in Table 1. Wherein Q·f is the product of the resonance quality factor and the frequency, τ f is the resonance frequency temperature coefficient.

[0037] Table 1 Test results of dielectric properties of ceramic samples of the embodiments of the present application

[0038]

[0039] As can be seen from Table 1, the quality factor and the yield of Example 1 of the present application are the highest, and the increase and decrease of the V2O5 addition amount will decrease the quality factor and the yield, and the yield of Comparative Example 1 cannot reach 90% because the addition amount of V2O5 is too high, and the addition amount of V2O5 in Comparative Example 2 is too low.

[0040] The above are the embodiments listed in the present embodiment, but the present embodiment is not limited to the above optional embodiments, and those skilled in the art can obtain other various embodiments by arbitrarily combining the above modes with each other, and anyone can obtain other various forms of embodiments under the inspiration of the present embodiment. The above specific embodiments should not be understood as limiting the protection scope of the present embodiment, and the protection scope of the present embodiment should be defined by the claims, and the specification can be used to explain the claims.

Claims

1. A method for preparing ceramic powder with high yield, characterized in that: Includes the following steps: S1. After ball milling, drying and sieving MgO and ZrO2, pre-calcination is performed to obtain primary MgZrO3 powder; S2. After ball milling, drying and sieving CaO and ZrO2, pre-calcination is performed to obtain primary CaZrO3 powder; S3. Mix the primary MgZrO3 powder, the primary CaZrO3 powder and the sintering aid and perform secondary ball milling. After secondary ball milling, dry and sieve, and sinter to obtain ceramic powder. The sintering aid is 1 wt% ZnO and 0.5-2 wt% V2O5; In step S3, the primary MgZrO3 powder and the primary CaZrO3 powder are added at a molar ratio of 9:

1. The sintering process involves first heating to 500 ℃ and holding for 2 hours, then heating to 1350 ℃ and holding for 4 hours.

2. The method for preparing high-yield ceramic powder according to claim 1, characterized in that: The preheating temperature is 1200 ℃, and the temperature is maintained for 2 hours.

3. The method for preparing high-yield ceramic powder according to claim 2, characterized in that: The preheating rate is 5 °C / min.

4. The method for preparing high-yield ceramic powder according to claim 3, characterized in that: The heating rate for sintering is 2 °C / min.

5. A high-yield ceramic powder, characterized in that: The high-yield ceramic powder was prepared using the method described in any one of claims 1-4. The chemical formula of the ceramic powder is Mg. 0.9 Ca 0.1 ZrO3.

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