Making barium titanate dielectric for capacitors (Updated June 12)

Over the years I've needed capacitors with high dielectric constants. Click here to see my work with barium titanate to achieve this.

Measured relative dielectric constants (K)

The following are materials for which I've measured their dielectric constants.

Material	My Measured Dielectic Constant (K)	Dielectic Constant (K) from other Sources	Click for details
Cellulose Acetate (clear sheets)	2.3	?	Picture
Lucite Acrylic	2.6	2.8	Details
Resin (Dynatron/Bondo Corp.)	3.5	2.5 to 6 (for Epoxy Resin), also 4	Details
Paraffin wax	2.2	2 to 3, also between 2.1 and 2.2	Details
Varnished Cotton	2.7	N/A	Details

Special thanks to Zoltan Losonc for his guidance in how to construct suitable capacitors and make proper measurements of capacitance for computing dielectric constants. Zoltan's webpage on how to do these measurements is here. Any errors or deficiencies are my own.

Measured breakdown voltages

The following are materials for which I've measured their breakdown voltages.

Material	My Measured Breakdown Voltage	Breakdown Voltages from other Sources	Click for details
Varnished Cotton	9.17MV/m or 233V/mil	N/A	Details