本實驗以傳統固態反應法製備釓取代型釔鐵柘榴石((Y3-xGdx) Fe5O12 Garnet)為主成分，並添加鈣(Ca)與錫(Sn)粉末對材料進行一系列有系統的研發工作，並特別針對中科院擬研發的微波元件，尋找此系列材料的最佳化學計量、最佳製程條件，並探討該系列材料的最佳微波及磁性特性。
實驗結果顯示：(1)、在XRD觀察鈣跟錫的添加，並無其他相的生成。晶格常數隨釓含量的增加而變大且鈣跟錫的添加也會使晶格常數變大(12.381Å~12.532 Å)。(2)、少量添加鈣跟錫(y=0.20與y=0.30)有助於密度的提高(5.84)與殘餘磁化強度Mrem的降低(0.18 emu/g)，溫度穩定率方面以y=0.30最為穩定(<0.1%)，比市售要來的好(0.13%)。(3)、各系列的介電常數與其市售商品在1GHz時所量測到的值取出觀察，發現介電常數(10~13)都很接近市售商品，介電損耗比市售商品要來的低(<3*10-2)。(4)、在電子自旋共振實驗中發現發現鈣跟錫的添加越多，共振線寬有變大之趨勢(568 ~ 917Oe)，而隨釓含量的添加共振線寬有變小的趨勢(917 ~ 554Oe)。

In this study, we reported the preparation and characterization of a series of Ca and Sn doped garnet materials prepare by traditional solid state reaction of gadolinium-substituted yttrium iron garnet ((Y3-xGdx)Fe5O12 Garnet)-basic. Ingredients. Especially for being developed microwave components from Chung-Shan Institute of Science
and Technology, to find the best chemical stoichiometric ration ，process and measurement conditions, also discuss the best of materials, and magnetic properties of microwave. Result shows that:
(1).The X-ray diffraction pattern reveals that all the samples appear as a
single phase. Lattice constant increases with the increase of Gd content
and also adding Ca and Sn make larger lattice constant.
(2).Adding a small amount of Ca and Sn helps to improve the density and
reduce Mrem. There is no significant change in the rate of temperature
stability which approaches commercial products even some of
proportion are better.
(3).Observed in 1 GHz the measured value of commercial products and
every proportion sample .The temperature stability ratio of y = 0.30 is
most stable, better than commercial products.
(4). In the electron spin resonating experiment discovered that the
discovery calcium are more with the tin increase, the resonating line width has increasing tendency, But has along with the gadolinium content's increase resonating line width changes the small tendency.

[1] S. Geller,G. P. Espinosa,H. J. Williams,R.C. Sherwood and E. A.
Nesbitt,” Rare Earth and Yttrium Free Ferrimagnetic Garnet with
493K Curie Temperature ”,Appl. Phys. Letters,3, 60-61,(1963).
[2] S. Geller,G. P. Espinosa, H. J. Williams,R.C. Sherwood and E. A.
Nesbitt,” Ferrimagnetic Garnets Containing Pentavalent
Vanadium ”,Appl. Phys.Letters,35, 570-572,(1964).
[3] Deltronic Crystal Industries, INC.
[4] 近角聰信，鐵磁性物理，ch 9 亞鐵磁氧化物的磁性，廣州大學出
版社，p172，2002 年7 月第一版。
[5] 胡朝彰，雷射加熱提拉法生長釔鐵柘榴石晶纖之研究，國立中
央大學機械工程研究所博士論文，民國92 年。
[6] N. P. Padture and G. Klemens, “ Low thermal conductivity in garnet
”, J.Am. Ceram. Soc. 1018-1020 (1997).
[7] 唐敏注，”通訊用軟磁材料之特性及應用”，工業材料105 期，
42-50(1995).
[8] 陳文照，曾春風，遊信和。「材料科學工程」。高立圖書有限
公司，p767-776，民國88年.
[9] William E. Courtney, “Analysis and Evaluation of a Method of
Measuring the Complex Permittivity and Permeability of Microwave
Insulators,” IEEE Transactions on Microwave Theory and Technique.,
vol. MTT-18, NO.8, (1970).
[10] Denesk C. Dube, Rudolf Zurmuhlen, Andrew Bell, Nava Setter,
“Dielectric Measurements on High-Q Ceramics in the Microwave
Region,” J. Am. Ceram. Soc.,80, (1997).
[11] Yoshio Kobayshi, Shuzo Tanaka, “Resonant Modes of a Dielectric
Rod Resonator Short-Circuited at Both Ends by Parallel Conducting
Plates,” IEEE Transactions on Microwave Theory and Technique,
vol. MTT-28, NO.10, October, (1980).
[12] Yoshio Kobayshi, Takayuki Aoki, Yukimasa Kabe, “Microwave
Measurement Of Dielectric Properties of Low-Loss Materials by the
Dielectric Rod Resonator Method,” IEEE Transactions on
Microwave Theory and Technique, vol. MTT-33, NO.7, July, (1985).
[13] Yoshio Kobayshi, Takayuki Aoki, Yukimasa Kabe, “Influence of
Shields on the Q-Factors of a TE0 Dielectric Resonator,” IEEE
Transactions on Microwave Theory and Technique, vol. MTT-33,
NO.12, December, (1985)
[14] 謝建國, “氧化鉍添加劑對鋇釹鈦高頻用介電陶瓷之影響, ” ,國立
清華大學碩士論文, (2002).
[15] Agilent Technologies, "Agilent Basics of Measuring the Dielectric
properties of Materials, Agilent Literature Number 5989-2589EN,
June ,26, (2006).
[16]鄭智文”以共沉法製備摻雜鉍釔鐵柘榴石之微波性質研究”
國東華大學材料科學與工程研究所,(2006).
[17] L. Landau, E. Lifshitz, “On the theory of dispersion of magnetic
permeability in ferromagnetic bodies”, Phys. Z. Sowjetunion 8
,153, (1935).
[18] J.H.E. Griffiths, “Anomalous high-frequency resistance of
ferromagnetic metals”, nature 158.,670, (1946).
[19] J.L. Snoek, “ Gyromagnetic resonance in ferrites”, nature 160,90,
(1947).
[20] C. Kittel, “Interpretation of anomalous Larmor frequencies in
ferromagnetic resonance experiment”, Phys. Rev.71, 270 (1947).
[21] C. Kittel, “On the theory of ferromagnetic resonance absorption”,
Phys. Rev. 73, 155(1948).
[22] Gerhard Winkler, “Magnetic garnet”, 1981.
[23] J.F. Dillon, “ Ferrimagnetic resonance in yttrium iron garnet”, Phys.
Rev. 105, 759 (1957).
[24] R.C. LeCraw, E.G. Spencer, C.S. Porter, “Ferromagnetic resonance
linewidth in yttrium iron garnet single crystals”, Phys. Rev. 110,
1311 (1958).
[25] Keith J. Laidler, John H. Meiser, “Physical chemistry second
edition”,Houghton Mifflin,643~644, (1995).
[26] Robert M. Silverstein, Francis X. Webster, “Spectrometric
Identification of Organic Compounds”, Sixth edition, (1997).
[27] S. Yangyun, R. J. Brook, “Preparation of zirconia toughened
ceramics by reaction sintering,” Sci. Sintering, 35-37,(1985).
[28] W.J. Huppmann, G. Ptzow, Sintering Process, Plenum Prss,
189-200, (1979).
[29] H.Y. Lu, in Physical Ceramics, (1995).
[30] M. Randall, German, Sintering Theory and Practice, John
Wily and Sons, New York, (1996).
[31] H.S. Canon, F.V. Lenel, in “Edited by F. Benesovsky Metallwerk
Plansee,”Reutte,118, 106, (1953).
[32] T. Inui and N. Ogasawara, “Grain Size Effects on Microwave
Ferrite Magnetic Properties ”J. Appl. Phys.,49,2019,(1978)