Alumina 96 (Aℓ₂O₃96％) properties (physical)

Item	Unit
Bending strength	k/cm2	3,000
	Mpa	294
Apparent specific gravity	－	3.7
Water absorption rate	％	0
Melting point	℃	2,020
Thermal conductivity	Cal/cm･secs.℃	0.04
Thermal expansion coefficient	20-500×10-6/℃	7.3
	500-800×10-6/℃	8.0
Specific resistance	Ωcm	＞1014
Dielectric strength	KV/mm	＞10
Specific permittivity(1KHz)	－	9.0
Dissipation factor(1KHz)	tan×10-4	10

Alumina 96 properties (chemical resistance)

Chemical name	Temperature	Time	Evaluation
35％Hydrochloric acid	Boiling	30 mins.	◎
70% nitric acid	Boiling	30 mins.	◎
98% sulfuric acid	Boiling	30 mins.	◎
90% phosphoric acid	Boiling	30 mins.	○
60% hydrofluoric acid	20℃	24Time	△
10% potassium hydroxide	80℃	7 days	◎
Potassium hydroxide	500℃(Boiling)	24 hrs.	△
Sodium hydroxide	500℃(Boiling)	24 hrs.	○
Sodium carbonate	900℃(Boiling)	24 hrs.	○
Sodium sulfate	1000℃(Boiling)	24 hrs.	◎
Potassium fluoride	90℃(Boiling)	4 hrs.	×

◎：No erosion　○：Slight erosion △：Some erosion　×：Major erosion

Ceramic products are co-developed by Hirosugi-Keiki Co., Ltd. and Ohtsuka Ceramics Co., Ltd.