The structure and electronic properties of polymer-derived silicoboron–carbonitride ceramics are reported. Structural analysis using radial-distribution-function formalism showed that the local structure is comprised of Si tetrahedra with B, C, and N at the corners. Boron doping of SiCN leads to enhanced p-type conductivity (0.1 Ω−1 cm−1 at room temperature). The conductivity variation with temperature for both SiCN and SiBCN ceramics shows Mott’s variable range hopping behavior in these materials, characteristic of a highly defective semiconductor. The SiBCN ceramic has a low, positive value of thermopower, which is probably due to a compensation mechanism.

1.
R.
Riedel
,
H.-J.
Kleebe
,
H.
Schoenfelder
, and
F.
Aldinger
,
Nature (London)
374
,
526
(
1995
).
2.
L.
An
,
R.
Riedel
,
C.
Konetschny
,
K.-J.
Kleebe
, and
R.
Raj
,
J. Am. Ceram. Soc.
81
,
1349
(
1998
).
3.
R.
Riedel
,
L.
Ruwisch
,
L.
An
, and
R.
Raj
,
J. Am. Ceram. Soc.
81
,
3341
(
1998
).
4.
R.
Riedel
,
G.
Passing
,
H.
Schoenfelder
, and
R. J.
Brook
,
Nature (London)
355
,
714
(
1992
).
5.
R.
Riedel
,
A.
Kienzle
,
W.
Dressler
,
L.
Ruwisch
,
J.
Bill
, and
F.
Aldinger
,
Nature (London)
382
,
796
(
1996
).
6.
L. An, W. Zhang, V. M. Bright, M. L. Dunn, and R. Raj, Proceedings of the 13th Annual International Conference on Microelectromechanical Systems (2000), p. 619.
7.
M.
Scarlete
,
J.
He
,
J. F.
Harrod
, and
I. S.
Butler
,
NATO ASI Ser., Ser. E
297
,
125
(
1995
).
8.
C.
Haluschka
,
C.
Engel
, and
R.
Riedel
,
J. Eur. Ceram. Soc.
20
,
1365
(
2000
).
9.
K. J.
Rao
,
N.
Baskaran
,
P. A.
Ramakrishnan
,
B. G.
Ravi
, and
A.
Karthikeyan
,
Chem. Mater.
10
,
3109
(
1998
).
10.
A. M. Hermann, U. Onbasli, R. F. Tello, W. Kiehl, A. Naziripour, and Y. Wang, Proceedings of the 4th Asian Conference on Solid State Ionics (1994), p. 37.
11.
J.
Bill
,
J.
Seitz
,
G.
Thurn
,
J.
Duerr
,
J.
Canel
,
B. Z.
Janos
,
A.
Jalowiecki
,
D.
Sauter
,
S.
Schempp
,
H. P.
Lamparter
,
J.
Mayer
, and
F.
Aldinger
,
Phys. Status Solidi A
166
,
269
(
1998
).
12.
F.
Ténégal
,
A.-M.
Flank
,
M.
Cauchetier
, and
N.
Herlin
,
Nucl. Instrum. Methods Phys. Res. B
133
,
77
(
1997
).
13.
N. F. Mott and E. A. Davis, Electronic Processes in Noncrystalline Materials (Clarendon, Oxford, U.K., 1979).
14.
A.
Jalowiecki
,
J.
Bill
,
F.
Aldinger
, and
J.
Mayer
,
Composites
27A
,
717
(
1996
).
This content is only available via PDF.
You do not currently have access to this content.