JPS5845155A - Dielectric ceramic composition for high frequence - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dielectric ceramic composition for high frequency use.

In high frequency regions such as microwaves and millimeter waves.

Dielectric ceramics are widely used for dielectric resonators, dielectric substrates for MIC, etc.

Conventionally, as this type of dielectric porcelain, Zr8kura-8nO
, -T10g material, T18@O@, (Bl,
5r) (Zr, Ti)Oj-based materials, Ba(Zn,
τa)O, and other materials are known. These materials have a dielectric constant (gr) of 20 to 40. It is an excellent material with a Q of 4000 to 8000° and a temperature coefficient (T/) of 0 ppj'c. Materials with corresponding q values of C and even higher 1 are required.

Therefore, the object of the invention of F- is to provide a dielectric ceramic composition which has a higher pitch than the conventional one in the high frequency range.

In other words, the gist of this invention' is that ζro is the general formula
""r3C"1"M)O1 -Xla-81/* The expressed composition KsIP-, α02≦X≦α13. α
It is characterized by a person in range 11 of 28≦7≦αss, α59≦厘≦165 (round stock, work+y+gx1).

Hereinafter, this invention will be explained in detail according to examples +1! I will clarify.

The weighed raw materials were wet mixed for 2 hours in a 0-order turtle, 1200 υ.
Calcinate for 2 hours at
After wet mixing for 1 hour, dehydration, and sizing, the resulting powder was molded into a disk with dimensions of 12 fins φ x 6 tlt under a pressure of 2000 KI/cl, and fired at 1450 t' for 4 hours to prepare a porcelain sample. I got it.

The obtained nine porcelain samples were transferred to the Nirikame [dielectric constant at one frequency of 7GHH (su, ・Q, and temperature coefficient of resonance frequency (τf)
) was measured and the results are shown in Table 1. Items marked with * in Table 1 are outside the scope of this invention, and all other items are within the scope of this invention.

Figure 1 also shows Zr02 among the compositions involved in this invention.
t Z n Or T aOs/s Vc') (Q-C
The composition range is shown, and the sample numbers in Figure 1 match the sample numbers in Table 1.

The temperature coefficient (τf) of the resonance frequency is +25t' to +8SL
The value is calculated based on the following formula in the temperature range of '.

τI = -i τ6 - α Here, τ, temperature change rate of dielectric constant (f) a: line** rate of porcelain sample Table 1 As is clear from Table 1, this invention K is as follows:
Shows high 1r + Kasumi Dengo and also has good τI, special K
A value of up to 14,100 was obtained for Q, and in the high frequency region there was a dielectric colosser and M.
A high frequency dielectric ceramic useful for applications such as an XC dielectric substrate can be provided.

Note that the composition outside the scope of this invention (sample numbers 7 to 9) procedural amendment document dated February 25, 1980, Commissioner of the Japan Patent Office. , Government 1, Indication of the case, 1982 Patent Application No. 143294, 2, Name of the invention: Dielectric ceramic composition for high frequency, 3, Person making the amendment, 5, Number of inventions increased by the amendment, etc.

Claims (1)

[Claims] General formula B IL (Z r x Z n y T &
txt) Ov/s-x/5-sy/s Based on the expressed composition, α02≦X≦α13. α2B≦y
≦α33. α59≦2≦α65 (However, *”+7+Ten=
1) A high frequency dielectric ceramic composition characterized by falling within the range of 1).