Plunger

		Alumina							Zirconia
Item (JFM)	Unit	JC-AZ025A	JC-A995A	JC-A990A	JC-A995A	JC-A997A	JC-A997B	JC-A999A	JC-Z08	JC-ZA20
Physical Property
Content	%	-	95.0%	99.0%	99.5%	99.7%	99.7%	99.9%	-	-
Colour		Milky White	White	White	Milky White	Milky White	Milky White	White	Milky White	Milky White
Density	g/cm3	4.4	3.7	3.8	3.9	3.92	3.94	3.95	6.0	5.6
Mechanical Behavior
Vickers Hardness	GPa	15	13.7	15.2	16.0	17.2	17.2	17.5	12.5	10.5
Bending Strength	Mpa	650	350	310	360	380	380	400	1000	750
Compressive Strength	Mpa	-	-	2160	2350	2380	2400	2560	2100	2300
Young's Modulus	GPa	320	320	360	370	380	380	380	200	200
Poisson's Ratio	/	0.25	0.23	0.23	0.23	0.23	0.23	0.23	0.31	0.31
Fracture Toughness	Mpa.m1/2	5	3-4	3-4	4	4.8	5	5.4	4.6	7.4
Thermal Property
Coefficient of Thermal Expansion	10-6/°C	9	7.2	7.2	7.2	7.2	7.2	7.2	10.5	10
Thermal Conductivity	W/(m.K)	19	24	29	32	32	32	34	3	3
Specific Heat Capacity	J/(g.K)	-	0.78	0.79	0.78	0.79	0.79	0.78	0.46	0.46
Maximum Operating Temperature	°C	1600	1500	1600	1600	1600	1600	1600	2200	1600
Electrical Property
Dielectric Strength	kv/mm	-	15	15	15	15	15	15	11	13
Dielectric Constant （1MHz）	-	-	9.4	9.9	9.9	9.9	9.9	9.9	33	28
Dielectric Losses （1MHz）	（X10-4）	-	4	2	1	1	1	1	16	17
Volume Resistivity 20℃	Ω.cm	>10¹²	>10¹⁴	>10¹⁴	>10¹⁴	>10¹⁴	>10¹⁴	>10¹⁴	10¹³	>10¹⁴
Volume Resistivity 300℃	Ω.cm	-	10¹⁰	10¹⁰	10¹³	10¹³	10¹³	10¹³	10⁶	10⁶

* This data is an example of test results in lab. It may be different from the actual characteristics in a particular manufacturing process.

* This data is an example of test results in lab. It may be different from the actual characteristics in a particular manufacturing process.